[Gradle Release Plugin] - pre tag commit: '0.4.0'.

This bug is invalid

.gitignore

@@ -71,3 +71,8 @@ hs_err_pid*
 
 !gradle/wrapper/gradle-wrapper.jar
 
+/bin/
+
+.classpath
+.project
+.settings

README.md

@@ -1,7 +1,7 @@
 strman-java [![Build Status](https://travis-ci.org/shekhargulati/strman-java.svg?branch=master)](https://travis-ci.org/shekhargulati/strman-java) [![codecov.io](https://codecov.io/github/shekhargulati/strman-java/coverage.svg?branch=master)](https://codecov.io/github/shekhargulati/strman-java?branch=master) [![License](https://img.shields.io/:license-mit-blue.svg)](./LICENSE.txt)
 ------
 
-A Java 8 library for working with String. It is inspired by [dleitee/strman](https://github.com/dleitee/strman).
+A Java 8 library for working with String. You can refer to Javadocs online [http://shekhargulati.github.io/strman-java/](http://shekhargulati.github.io/strman-java/).
 
 Getting Started
 --------
@@ -15,7 +15,7 @@ For Apache Maven users, please add following to your pom.xml.
     <dependency>
         <groupId>com.shekhargulati</groupId>
         <artifactId>strman</artifactId>
-        <version>0.2.0</version>
+        <version>0.3.0</version>
     </dependency>
 </dependencies>
 ```
@@ -23,9 +23,11 @@ For Apache Maven users, please add following to your pom.xml.
 Gradle users can add following to their build.gradle file.
 
 ```
-compile(group: 'com.shekhargulati', name: 'strman', version: '0.2.0')
+compile(group: 'com.shekhargulati', name: 'strman', version: '0.3.0')
 ```
 
+To learn what we added in the latest version please refer to `./changelog.md`.
+
 ## Available Functions
 
 These are the available functions in current version of library:
@@ -80,6 +82,16 @@ chars("title")
 // result => ["t", "i", "t", "l", "e"]
 ```
 
+## charsCount
+
+Counts the number of occurrences of each character in the string
+
+```java
+import static strman.Strman.charsCount
+charsCount("abca")
+// result => Map(("a",2),("b",1),("c",1))
+```
+
 ## collapseWhitespace
 
 Replace consecutive whitespace characters with a single space.
@@ -496,6 +508,17 @@ transliterate("fóõ bár")
 // result => "foo bar"
 ```
 
+## trimEnd
+
+Removes trailing characters from string.
+
+```
+trimEnd("   abc   ")
+// result => Optional("   abc")
+trimEnd("")
+// result Optional.empty()
+```
+
 ## surround
 
 Surrounds a 'value' with the given 'prefix' and 'suffix'.
@@ -559,6 +582,68 @@ toSnakeCase("hello world")
 // result => "hello_world"
 ```
 
+## upperFirst
+
+Converts the first character of string to upper case.
+
+```java
+upperFirst("fred")
+// result => "Fred"
+```
+
+## words
+
+Splits a String to words
+
+```java
+words("This is a string, with words!")
+// result => ["This", "is", "a", "string", "with", "words"]
+```
+
+## isEnclosedBetween
+
+Verifies whether String is enclosed by encloser
+
+```java
+isEnclosedBetween("{{shekhar}}", "{{", "}}")
+// result => true
+```
+
+## join
+
+Join concatenates all the elements of the strings array into a single String. The separator string is placed between elements in the resulting string.
+
+```java
+join(new String[]{"hello","world","123"}, ";")
+// result => "hello;world;123")
+```
+
+## isBlank
+
+isEmpty returns true if a string is blank or null and false otherwise.
+
+```java
+isBlank("")
+// result => true)
+isBlank(null)
+// result => true)
+isBlank("test")
+// result => false)
+```
+
+## underscored
+
+`underscored` function converts a camel or dashed string into an underscored one
+
+```java
+underscored("MozTransform")
+// result => "moz_transform")
+```
+
+## Inspiration
+
+This library is inspired by [dleitee/strman](https://github.com/dleitee/strman).
+
 License
 -------
 strman is licensed under the MIT License - see the `LICENSE` file for details.

build.gradle

@@ -1,5 +1,6 @@
 plugins {
     id 'net.researchgate.release' version '2.3.3'
+    id "net.ltgt.errorprone" version "0.0.10"
 }
 
 group 'com.shekhargulati'
@@ -9,6 +10,8 @@ apply plugin: 'maven'
 apply plugin: 'maven-publish'
 apply plugin: 'signing'
 apply plugin: "jacoco"
+apply from: rootProject.file('gradle/checkstyle.gradle')
+apply plugin: "net.ltgt.errorprone"
 
 sourceCompatibility = 1.8
 

changelog.md

@@ -0,0 +1,63 @@
+# Version 0.3.0 
+
+
+* __Feature required in #73 (#77)__: Added `charsCount` function
+
+    [César Aguilera](mailto:cesar.aguilera.p@gmail.com) - Tue, 9 May 2017 18:16:11 +0530
+
+    ​
+
+* __fixed bug in containsAll (#76)__
+
+    [wli75](mailto:wli75@illinois.edu) - Tue, 7 Mar 2017 20:09:18 +0530
+
+    ​
+
+* __Resolved #66__: Added `trimEnd` function
+
+    [Shekhar Gulati](mailto:shekhargulati84@gmail.com) - Wed, 24 Aug 2016 15:32:45 +0530
+
+    ​
+
+* __Resolved #65__: Added `trimStart`function
+
+    [Shekhar Gulati](mailto:shekhargulati84@gmail.com) - Wed, 24 Aug 2016 15:02:00 +0530
+
+    ​
+
+* __Resolved #68__: Added `upperFirst` function
+
+    [Shekhar Gulati](mailto:shekhargulati84@gmail.com) - Wed, 24 Aug 2016 14:26:16 +0530
+
+    ​
+
+* __Resolved #69__: Added `words` function
+
+    [Shekhar Gulati](mailto:shekhargulati84@gmail.com) - Wed, 24 Aug 2016 12:56:18 +0530
+
+    ​
+
+* __Resolved#71__: Added `isEnclosedBetween` function
+
+    [Shekhar Gulati](mailto:shekhargulati84@gmail.com) - Wed, 24 Aug 2016 12:11:04 +0530
+
+    ​
+
+* __Resolved #54 and Resolved #59__: Added `capitalize` and `lowerFirst` functions
+
+    [Shekhar Gulati](mailto:shekhargulati84@gmail.com) - Wed, 27 Jul 2016 23:19:41 +0530
+
+    ​
+
+* __Resolved #53__: Added `join` function
+
+    [Shekhar Gulati](mailto:shekhargulati84@gmail.com) - Mon, 25 Jul 2016 15:29:43 +0530
+
+    ​
+
+* __Simplify Maven and Gradle configuration (#70)__
+
+    [Marcin Zajączkowski](mailto:mszpak@wp.pl) - Tue, 19 Jul 2016 20:58:57 +0530
+
+
+

etc/checkstyle-exclude.xml

@@ -0,0 +1,8 @@
+<?xml version="1.0"?>
+
+<!DOCTYPE suppressions PUBLIC
+        "-//Puppy Crawl//DTD Suppressions 1.1//EN"
+        "http://www.puppycrawl.com/dtds/suppressions_1_1.dtd">
+
+<suppressions>
+</suppressions>

etc/checkstyle.xml

@@ -0,0 +1,124 @@
+<?xml version="1.0"?>
+<!DOCTYPE module PUBLIC "-//Puppy Crawl//DTD Check Configuration 1.2//EN" "http://www.puppycrawl.com/dtds/configuration_1_2.dtd">
+<module name="com.puppycrawl.tools.checkstyle.Checker">
+    <!-- Root Checks -->
+    <module name="com.puppycrawl.tools.checkstyle.checks.NewlineAtEndOfFileCheck">
+        <property name="lineSeparator" value="lf"/>
+    </module>
+
+    <module name="SuppressionFilter">
+        <property name="file" value="etc/checkstyle-exclude.xml" />
+    </module>
+
+    <!-- TreeWalker Checks -->
+    <module name="com.puppycrawl.tools.checkstyle.TreeWalker">
+        <!-- Annotations -->
+        <module name="com.puppycrawl.tools.checkstyle.checks.annotation.AnnotationUseStyleCheck">
+            <property name="elementStyle" value="compact" />
+        </module>
+        <module name="com.puppycrawl.tools.checkstyle.checks.annotation.MissingOverrideCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.annotation.PackageAnnotationCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.annotation.AnnotationLocationCheck">
+            <property name="allowSamelineSingleParameterlessAnnotation"
+                      value="false" />
+        </module>
+
+        <!-- Block Checks -->
+        <module name="com.puppycrawl.tools.checkstyle.checks.blocks.EmptyBlockCheck">
+            <property name="option" value="text" />
+        </module>
+        <module name="com.puppycrawl.tools.checkstyle.checks.blocks.LeftCurlyCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.blocks.RightCurlyCheck">
+            <property name="tokens" value="LITERAL_CATCH"/>
+            <property name="option" value="alone" />
+        </module>
+        <module name="com.puppycrawl.tools.checkstyle.checks.blocks.NeedBracesCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.blocks.AvoidNestedBlocksCheck" />
+
+        <!-- Class Design -->
+        <module name="com.puppycrawl.tools.checkstyle.checks.design.FinalClassCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.design.InterfaceIsTypeCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.design.HideUtilityClassConstructorCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.design.MutableExceptionCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.design.InnerTypeLastCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.design.OneTopLevelClassCheck" />
+
+        <!-- Coding -->
+        <module name="com.puppycrawl.tools.checkstyle.checks.coding.CovariantEqualsCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.coding.EmptyStatementCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.coding.EqualsHashCodeCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.coding.InnerAssignmentCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.coding.SimplifyBooleanExpressionCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.coding.SimplifyBooleanReturnCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.coding.StringLiteralEqualityCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.coding.NestedForDepthCheck">
+            <property name="max" value="3" />
+        </module>
+        <module name="com.puppycrawl.tools.checkstyle.checks.coding.NestedIfDepthCheck">
+            <property name="max" value="3" />
+        </module>
+        <module name="com.puppycrawl.tools.checkstyle.checks.coding.NestedTryDepthCheck">
+            <property name="max" value="3" />
+        </module>
+        <module name="com.puppycrawl.tools.checkstyle.checks.coding.MultipleVariableDeclarationsCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.coding.RequireThisCheck">
+            <property name="checkMethods" value="false" />
+            <property name="validateOnlyOverlapping" value="false" />
+        </module>
+        <module name="com.puppycrawl.tools.checkstyle.checks.coding.OneStatementPerLineCheck" />
+
+        <!-- Imports -->
+        <module name="com.puppycrawl.tools.checkstyle.checks.imports.AvoidStarImportCheck">
+            <property name="excludes" value="javax.persistence, java.util.stream.Collectors, java.util.*,org.hamcrest.CoreMatchers, org.junit.Assert, strman.Strman"/>
+        </module>
+        <module name="com.puppycrawl.tools.checkstyle.checks.imports.IllegalImportCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.imports.RedundantImportCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.imports.UnusedImportsCheck">
+            <property name="processJavadoc" value="true" />
+        </module>
+        <module name="com.puppycrawl.tools.checkstyle.checks.imports.ImportOrderCheck">
+            <property name="groups" value="java,/^javax?\./,*" />
+            <property name="ordered" value="true" />
+            <property name="separated" value="true" />
+            <property name="option" value="bottom" />
+            <property name="sortStaticImportsAlphabetically" value="true" />
+        </module>
+
+        <!-- Miscellaneous -->
+        <module name="com.puppycrawl.tools.checkstyle.checks.indentation.CommentsIndentationCheck">
+            <property name="tokens" value="BLOCK_COMMENT_BEGIN"/>
+        </module>
+        <module name="com.puppycrawl.tools.checkstyle.checks.UpperEllCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.ArrayTypeStyleCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.OuterTypeFilenameCheck" />
+
+        <!-- Modifiers -->
+        <module name="com.puppycrawl.tools.checkstyle.checks.modifier.RedundantModifierCheck" />
+
+        <!-- Regexp -->
+        <module name="com.puppycrawl.tools.checkstyle.checks.regexp.RegexpSinglelineJavaCheck">
+            <property name="maximum" value="0"/>
+            <property name="format" value="org\.junit\.Assert\.assert" />
+            <property name="message"
+                      value="Please use AssertJ imports." />
+            <property name="ignoreComments" value="true" />
+        </module>
+        <module name="com.puppycrawl.tools.checkstyle.checks.regexp.RegexpCheck">
+            <property name="format" value="[ \t]+$" />
+            <property name="illegalPattern" value="true" />
+            <property name="message" value="Trailing whitespace" />
+        </module>
+
+        <!-- Whitespace -->
+        <module name="com.puppycrawl.tools.checkstyle.checks.whitespace.GenericWhitespaceCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.whitespace.MethodParamPadCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.whitespace.NoWhitespaceAfterCheck" >
+            <property name="tokens" value="BNOT, DEC, DOT, INC, LNOT, UNARY_MINUS, UNARY_PLUS, ARRAY_DECLARATOR"/>
+        </module>
+        <module name="com.puppycrawl.tools.checkstyle.checks.whitespace.NoWhitespaceBeforeCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.whitespace.ParenPadCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.whitespace.TypecastParenPadCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.whitespace.WhitespaceAfterCheck" />
+        <module name="com.puppycrawl.tools.checkstyle.checks.whitespace.WhitespaceAroundCheck" />
+    </module>
+</module>

gradle.properties

@@ -1 +1 @@
-version=0.3.0
+version= 0.4.0

gradle/checkstyle.gradle

@@ -0,0 +1,10 @@
+apply plugin: 'checkstyle'
+
+checkstyle {
+    configFile rootProject.file('etc/checkstyle.xml')
+    showViolations true
+}
+
+dependencies {
+    checkstyle 'com.puppycrawl.tools:checkstyle:7.7'
+}

gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-2.5-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-3.5-all.zip

src/main/java/strman/Strman.java

@@ -1,4 +1,3 @@
-
 /*
  *
  *  * The MIT License
@@ -27,25 +26,26 @@
 
 package strman;
 
+import java.nio.charset.StandardCharsets;
 import java.util.*;
 import java.util.function.Predicate;
 import java.util.function.Supplier;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
+import java.util.stream.IntStream;
 import java.util.stream.Stream;
 
 import static java.util.function.Function.identity;
-import static java.util.stream.Collectors.counting;
+import static java.util.stream.Collectors.*;
-import static java.util.stream.Collectors.groupingBy;
-import static java.util.stream.Collectors.joining;
 
 /**
  * A String manipulation library without any dependencies
  */
 public abstract class Strman {
 
-    private static final Predicate<String> NULL_STRING_PREDICATE = str -> str == null;
+    private static final Predicate<String> NULL_STRING_PREDICATE = Objects::isNull;
     private static final Supplier<String> NULL_STRING_MSG_SUPPLIER = () -> "'value' should be not null.";
+    private static final String[] EMPTY_ARRAY = new String[0];
 
     private Strman() {
     }
@@ -100,10 +100,6 @@ public abstract class Strman {
         return (index < length && index >= 0) ? Optional.of(String.valueOf(value.charAt(index))) : Optional.empty();
     }
 
-    private static boolean isNullOrEmpty(String input) {
-        return input == null || input.isEmpty();
-    }
-
     /**
      * Returns an array with strings between start and end.
      *
@@ -119,7 +115,8 @@ public abstract class Strman {
         validate(end, NULL_STRING_PREDICATE, () -> "'end' should be not null.");
 
         String[] parts = value.split(end);
-        return Arrays.stream(parts).map(subPart -> subPart.substring(subPart.indexOf(start) + start.length())).toArray(String[]::new);
+        return Arrays.stream(parts).map(subPart -> subPart.substring(subPart.indexOf(start) + start.length()))
+                .toArray(String[]::new);
     }
 
     /**
@@ -133,7 +130,6 @@ public abstract class Strman {
         return value.split("");
     }
 
-
     /**
      * Replace consecutive whitespace characters with a single space.
      *
@@ -145,7 +141,6 @@ public abstract class Strman {
         return value.trim().replaceAll("\\s\\s+", " ");
     }
 
-
     /**
      * Verifies that the needle is contained in the value. The search is case insensitive
      *
@@ -242,9 +237,11 @@ public abstract class Strman {
      * @param allowOverlapping boolean to take into account overlapping
      * @return count of times substring exists
      */
-    public static long countSubstr(final String value, final String subStr, final boolean caseSensitive, boolean allowOverlapping) {
+    public static long countSubstr(final String value, final String subStr, final boolean caseSensitive,
+                                   boolean allowOverlapping) {
         validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
-        return countSubstr(caseSensitive ? value : value.toLowerCase(), caseSensitive ? subStr : subStr.toLowerCase(), allowOverlapping, 0L);
+        return countSubstr(caseSensitive ? value : value.toLowerCase(), caseSensitive ? subStr : subStr.toLowerCase(),
+                allowOverlapping, 0L);
     }
 
     /**
@@ -281,7 +278,8 @@ public abstract class Strman {
      * @param caseSensitive true or false
      * @return true or false
      */
-    public static boolean endsWith(final String value, final String search, final int position, final boolean caseSensitive) {
+    public static boolean endsWith(final String value, final String search, final int position,
+                                   final boolean caseSensitive) {
         validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
         int remainingLength = position - search.length();
         if (caseSensitive) {
@@ -327,7 +325,7 @@ public abstract class Strman {
      */
     public static String base64Decode(final String value) {
         validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
-        return new String(Base64.getDecoder().decode(value));
+        return new String(Base64.getDecoder().decode(value), StandardCharsets.UTF_8);
     }
 
     /**
@@ -338,7 +336,7 @@ public abstract class Strman {
      */
     public static String base64Encode(final String value) {
         validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
-        return Base64.getEncoder().encodeToString(value.getBytes());
+        return Base64.getEncoder().encodeToString(value.getBytes(StandardCharsets.UTF_8));
     }
 
     /**
@@ -435,7 +433,7 @@ public abstract class Strman {
      */
     public static String format(final String value, String... params) {
         validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
-        Pattern p = Pattern.compile("\\{(\\w+)\\}");
+        Pattern p = Pattern.compile("\\{(\\w+)}");
         Matcher m = p.matcher(value);
         String result = value;
         while (m.find()) {
@@ -640,7 +638,8 @@ public abstract class Strman {
      * @param caseSensitive whether search should be case sensitive
      * @return Return position of the last occurrence of 'needle'.
      */
-    public static int lastIndexOf(final String value, final String needle, final int offset, final boolean caseSensitive) {
+    public static int lastIndexOf(final String value, final String needle, final int offset,
+                                  final boolean caseSensitive) {
         validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
         validate(needle, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
         if (caseSensitive) {
@@ -775,7 +774,8 @@ public abstract class Strman {
     public static String removeRight(final String value, final String suffix, final boolean caseSensitive) {
         validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
         validate(suffix, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
-        return endsWith(value, suffix, caseSensitive) ? value.substring(0, value.toLowerCase().lastIndexOf(suffix.toLowerCase())) : value;
+        return endsWith(value, suffix, caseSensitive) ? value
+                .substring(0, value.toLowerCase().lastIndexOf(suffix.toLowerCase())) : value;
     }
 
     /**
@@ -810,13 +810,15 @@ public abstract class Strman {
      * @param caseSensitive whether search should be case sensitive or not
      * @return String replaced with 'newvalue'.
      */
-    public static String replace(final String value, final String search, final String newValue, final boolean caseSensitive) {
+    public static String replace(final String value, final String search, final String newValue,
+                                 final boolean caseSensitive) {
         validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
         validate(search, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
         if (caseSensitive) {
             return value.replace(search, newValue);
         }
-        return Pattern.compile(search, Pattern.CASE_INSENSITIVE).matcher(value).replaceAll(Matcher.quoteReplacement(newValue));
+        return Pattern.compile(search, Pattern.CASE_INSENSITIVE).matcher(value)
+                .replaceAll(Matcher.quoteReplacement(newValue));
     }
 
     /**
@@ -907,10 +909,22 @@ public abstract class Strman {
      * @return Words Array
      */
     public static String[] words(final String value) {
-        validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
+        return words(value, "\\s+");
-        return value.split("\\W+");
     }
 
+    /**
+     * Splits a String to words by delimiter, \s+ by default
+     *
+     * @param value     The input String
+     * @param delimiter delimiter for splitting input String
+     * @return words array
+     */
+    public static String[] words(final String value, final String delimiter) {
+        validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
+        return value.split(delimiter);
+    }
+
+
     /**
      * Truncate the unsecured form string, cutting the independent string of required position.
      *
@@ -950,11 +964,8 @@ public abstract class Strman {
      */
     public static String htmlEncode(final String html) {
         validate(html, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
-        return html
+        return html.chars().mapToObj(c -> "\\u" + String.format("%04x", c).toUpperCase())
-                .chars()
+                .map(HtmlEntities.encodedEntities::get).collect(joining());
-                .mapToObj(c -> "\\u" + String.format("%04x", c).toUpperCase())
-                .map(HtmlEntities.encodedEntities::get)
-                .collect(joining());
     }
 
     /**
@@ -998,7 +1009,7 @@ public abstract class Strman {
     public static String slugify(final String value) {
         validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
         String transliterated = transliterate(collapseWhitespace(value.trim().toLowerCase()));
-        return Arrays.stream(words(transliterated.replace("&", "-and-"))).collect(joining("-"));
+        return Arrays.stream(words(transliterated.replace("&", "-and-"), "\\W+")).collect(joining("-"));
     }
 
     /**
@@ -1019,7 +1030,6 @@ public abstract class Strman {
         return result;
     }
 
-
     /**
      * Surrounds a 'value' with the given 'prefix' and 'suffix'.
      *
@@ -1041,7 +1051,9 @@ public abstract class Strman {
      * @return String in camelCase.
      */
     public static String toCamelCase(final String value) {
-        validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
+        if (value == null || value.length() == 0) {
+            return "";
+        }
         String str = toStudlyCase(value);
         return str.substring(0, 1).toLowerCase() + str.substring(1);
     }
@@ -1055,10 +1067,7 @@ public abstract class Strman {
     public static String toStudlyCase(final String value) {
         validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
         String[] words = collapseWhitespace(value.trim()).split("\\s*(_|-|\\s)\\s*");
-        return Arrays.stream(words)
+        return Arrays.stream(words).filter(w -> !w.trim().isEmpty()).map(Strman::upperFirst).collect(joining());
-                .filter(w -> !w.trim().isEmpty())
-                .map(Strman::upperFirst)
-                .collect(joining());
     }
 
     /**
@@ -1106,8 +1115,7 @@ public abstract class Strman {
 
     public static String decode(final String value, final int digits, final int radix) {
         validate(value, NULL_STRING_PREDICATE, NULL_STRING_MSG_SUPPLIER);
-        return Arrays
+        return Arrays.stream(value.split("(?<=\\G.{" + digits + "})"))
-                .stream(value.split("(?<=\\G.{" + digits + "})"))
                 .map(data -> String.valueOf(Character.toChars(Integer.parseInt(data, radix))))
                 .collect(joining());
     }
@@ -1117,7 +1125,6 @@ public abstract class Strman {
         return value.chars().mapToObj(ch -> leftPad(Integer.toString(ch, radix), "0", digits)).collect(joining());
     }
 
-
     /**
      * Join concatenates all the elements of the strings array into a single String. The separator string is placed between elements in the resulting string.
      *
@@ -1152,11 +1159,7 @@ public abstract class Strman {
         if (input.length() == 0) {
             return "";
         }
-        return head(input)
+        return head(input).map(String::toUpperCase).map(h -> tail(input).map(t -> h + t.toLowerCase()).orElse(h)).get();
-                .map(String::toUpperCase)
-                .map(h ->
-                        tail(input).map(t -> h + t.toLowerCase()).orElse(h))
-                .get();
     }
 
     /**
@@ -1164,7 +1167,6 @@ public abstract class Strman {
      *
      * @param input The string to convert
      * @return The converted string
-     * @throws IllegalArgumentException
      */
     public static String lowerFirst(final String input) throws IllegalArgumentException {
         if (input == null) {
@@ -1174,11 +1176,7 @@ public abstract class Strman {
             return "";
         }
 
-        return head(input)
+        return head(input).map(String::toLowerCase).map(h -> tail(input).map(t -> h + t).orElse(h)).get();
-                .map(String::toLowerCase)
-                .map(h ->
-                        tail(input).map(t -> h + t).orElse(h))
-                .get();
     }
 
     /**
@@ -1223,10 +1221,7 @@ public abstract class Strman {
         if (input == null) {
             throw new IllegalArgumentException("input can't be null");
         }
-        return head(input)
+        return head(input).map(String::toUpperCase).map(h -> tail(input).map(t -> h + t).orElse(h)).get();
-                .map(String::toUpperCase)
-                .map(h -> tail(input).map(t -> h + t).orElse(h))
-                .get();
     }
 
     /**
@@ -1236,24 +1231,18 @@ public abstract class Strman {
      * @return Returns the trimmed string.
      */
     public static Optional<String> trimStart(final String input) {
-        return Optional.ofNullable(input)
+        return Optional.ofNullable(input).filter(v -> !v.isEmpty()).map(Strman::leftTrim);
-                .filter(v -> !v.isEmpty())
-                .map(Strman::leftTrim);
     }
 
-
     /**
      * Removes leading characters from string.
      *
      * @param input The string to trim.
      * @param chars The characters to trim.
-     *
      * @return Returns the trimmed string.
      */
     public static Optional<String> trimStart(final String input, String... chars) {
-        return Optional.ofNullable(input)
+        return Optional.ofNullable(input).filter(v -> !v.isEmpty()).map(v -> {
-                .filter(v -> !v.isEmpty())
-                .map(v -> {
             String pattern = String.format("^[%s]+", join(chars, "\\"));
             return v.replaceAll(pattern, "");
         });
@@ -1266,30 +1255,23 @@ public abstract class Strman {
      * @return Returns the trimmed string.
      */
     public static Optional<String> trimEnd(final String input) {
-        return Optional.ofNullable(input)
+        return Optional.ofNullable(input).filter(v -> !v.isEmpty()).map(Strman::rightTrim);
-                .filter(v -> !v.isEmpty())
-                .map(Strman::rightTrim);
     }
 
-
     /**
      * Removes trailing characters from string.
      *
      * @param input The string to trim.
      * @param chars The characters to trim.
-     *
      * @return Returns the trimmed string.
      */
     public static Optional<String> trimEnd(final String input, String... chars) {
-        return Optional.ofNullable(input)
+        return Optional.ofNullable(input).filter(v -> !v.isEmpty()).map(v -> {
-                .filter(v -> !v.isEmpty())
-                .map(v -> {
             String pattern = String.format("[%s]+$", join(chars, "\\"));
             return v.replaceAll(pattern, "");
         });
     }
 
-
     /**
      * Counts the number of occurrences of each character in the string
      *
@@ -1301,9 +1283,125 @@ public abstract class Strman {
             return Collections.emptyMap();
         }
 
-        return input.chars()
+        return input.chars().mapToObj(c -> (char) c).collect(groupingBy(identity(), counting()));
-                .mapToObj(c -> (char) c)
+    }
-                .collect(groupingBy(identity(), counting()));
+
+    /**
+     * Checks if string is empty.  This is a null safe check and will return true when string is null.
+     *
+     * @param input The input string
+     * @return true if input string is null or empty
+     */
+    public static boolean isBlank(String input) {
+        return input == null || input.isEmpty();
+    }
+
+    /**
+     * Changes passed in string to all lower case and adds underscore between words.
+     *
+     * @param input The input string
+     * @return the input string in all lower case with underscores between words
+     */
+    public static String underscored(final String input) {
+        if (input == null || input.length() == 0) {
+            return "";
+        }
+
+        return input.trim().replaceAll("([a-z\\d])([A-Z]+)", "$1_$2").replaceAll("[-\\s]+", "_").toLowerCase();
+    }
+
+    /**
+     * Aggregates the contents of n strings into a single list of tuples.
+     *
+     * @param inputs A list of strings.
+     * @return A list of strings if none of the strings in the input is null or empty.
+     * An empty list otherwise.
+     */
+    public static List<String> zip(String... inputs) {
+        if (inputs.length == 0) {
+            return Collections.emptyList();
+        }
+        OptionalInt min = Arrays.stream(inputs).mapToInt(str -> str == null ? 0 : str.length()).min();
+        if (!min.isPresent()) {
+            return Collections.emptyList();
+        }
+        return IntStream.range(0, min.getAsInt())
+                .mapToObj(elementIndex -> Arrays.stream(inputs)
+                        .map(input -> String.valueOf(input.charAt(elementIndex)))
+                        .collect(joining()))
+                .collect(toList());
+    }
+
+    /**
+     * Split lines to an array
+     *
+     * @param input The input String
+     * @return lines in an array
+     */
+    public static String[] lines(String input) {
+        if (input == null) {
+            return EMPTY_ARRAY;
+        }
+        return input.split("\r\n?|\n");
+    }
+
+    /**
+     * Converts a underscored or camelized string into an dasherized one.
+     *
+     * @param input The input String
+     * @return dasherized String.
+     */
+    public static String dasherize(String input) {
+        return toKebabCase(input);
+    }
+
+    /**
+     * Converts an underscored, camelized, or dasherized string into a humanized one. Also removes beginning and ending whitespace.
+     *
+     * @param input The input String
+     * @return humanized version of String
+     */
+    public static String humanize(final String input) {
+        if (input == null || input.length() == 0) {
+            return "";
+        }
+        return upperFirst(underscored(input).replaceAll("_", " "));
+    }
+
+    /**
+     * Returns a copy of the string in which all the case-based characters have had their case swapped.
+     *
+     * @param input Input string
+     * @return String with all the case swapped
+     */
+    public static String swapCase(String input) {
+        if (input == null || input.length() == 0) {
+            return "";
+        }
+        StringBuilder resultBuilder = new StringBuilder();
+        for (char ch : input.toCharArray()) {
+            if (Character.isUpperCase(ch)) {
+                resultBuilder.append(Character.toLowerCase(ch));
+            } else {
+                resultBuilder.append(Character.toUpperCase(ch));
+            }
+        }
+        return resultBuilder.toString();
+    }
+
+    public static String[] chop(String input, int step) {
+        if (input == null || input.length() == 0) {
+            return EMPTY_ARRAY;
+        }
+        if (step == 0) {
+            return new String[]{input};
+        }
+        int strLength = input.length();
+        int iterations = strLength % step == 0 ? strLength / step : strLength / step + 1;
+        return IntStream.iterate(0, i -> i + step)
+                .limit(iterations)
+                .mapToObj(i -> input.substring(i, (i + step) < strLength ? i + step : strLength))
+                .toArray(String[]::new);
     }
 
     private static void validate(String value, Predicate<String> predicate, final Supplier<String> supplier) {
@@ -1325,5 +1423,10 @@ public abstract class Strman {
         }
         return countSubstr(value.substring(offset), subStr, allowOverlapping, ++count);
     }
+
+    private static boolean isNullOrEmpty(String input) {
+        return input == null || input.isEmpty();
+    }
+
 }
 

src/test/java/strman/StrmanTests.java

@@ -26,21 +26,29 @@
 
 package strman;
 
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Optional;
+
 import org.junit.Ignore;
 import org.junit.Test;
 
-import java.util.*;
+import static java.util.Arrays.asList;
-
+import static java.util.Collections.singletonList;
 import static java.util.stream.Collectors.toList;
 import static org.hamcrest.CoreMatchers.*;
+import static org.hamcrest.collection.IsArrayContaining.hasItemInArray;
 import static org.hamcrest.collection.IsArrayContainingInOrder.arrayContaining;
+import static org.hamcrest.collection.IsArrayWithSize.arrayWithSize;
 import static org.hamcrest.collection.IsArrayWithSize.emptyArray;
+import static org.hamcrest.collection.IsEmptyCollection.empty;
 import static org.junit.Assert.*;
 import static strman.Strman.*;
 import static strman.Strman.endsWith;
-import static strman.Strman.format;
 
-public class StrmanTest {
+public class StrmanTests {
 
     @Test
     public void append_shouldAppendStringsToEndOfValue() throws Exception {
@@ -821,6 +829,18 @@ public class StrmanTest {
         Arrays.stream(fixture).forEach(el -> assertThat(String.format("toSnakeCase(%s) should be de_camelize", el), toSnakeCase(el), equalTo("de_camelize")));
     }
 
+    @Test
+    public void snakeCase_shouldConvertAStringToSnakecase() throws Exception {
+        String[] input = {
+                "Foo Bar",
+                "fooBar"
+        };
+
+        Arrays.stream(input).forEach(el ->
+                assertThat(String.format("%s should be foo_bar", el), toSnakeCase(el), is(equalTo("foo_bar"))));
+
+    }
+
     @Test
     public void unequal_shouldTestInequalityOfStrings() throws Exception {
         assertThat(unequal("a", "b"), equalTo(true));
@@ -859,12 +879,11 @@ public class StrmanTest {
         assertThat(result, is(equalTo("fred, barney, & pebbles")));
     }
 
-    @Ignore
+    @Test
     public void kebabCase_shouldConvertAStringToKebabCase() throws Exception {
         String[] input = {
                 "Foo Bar",
-                "fooBar",
+                "fooBar"
-                "__FOO_BAR__"
         };
 
         Arrays.stream(input).forEach(el ->
@@ -872,19 +891,6 @@ public class StrmanTest {
 
     }
 
-    @Ignore
-    public void snakeCase_shouldConvertAStringToSnakecase() throws Exception {
-        String[] input = {
-                "Foo Bar",
-                "fooBar",
-                "--FOO-BAR--"
-        };
-
-        Arrays.stream(input).forEach(el ->
-                assertThat(String.format("%s should be foo_bar", el), toSnakeCase(el), is(equalTo("foo_bar"))));
-
-    }
-
     @Test
     public void join_shouldJoinArrayOfStringIntoASingleString() throws Exception {
         String[] strings = {
@@ -945,7 +951,7 @@ public class StrmanTest {
     @Test
     public void words_shouldConvertTextToWords() throws Exception {
         final String line = "This is a string, with words!";
-        assertThat(words(line), is(new String[]{"This", "is", "a", "string", "with", "words"}));
+        assertThat(words(line), arrayContaining("This", "is", "a", "string,", "with", "words!"));
     }
 
     @Test
@@ -1027,4 +1033,157 @@ public class StrmanTest {
 
         assertThat(charsCount("-----abbcccCCCBBA-----"), equalTo(expectedOutput));
     }
+
+    @Test
+    public void isBlank_shouldReturnTrueIfNull() {
+        assertTrue(isBlank(null));
+    }
+
+    @Test
+    public void isBlank_shouldReturnTrueIfEmpty() {
+        assertTrue(isBlank(""));
+    }
+
+    @Test
+    public void isBlank_shouldReturnFalseIfNotEmpty() {
+        assertFalse(isBlank("ac"));
+    }
+
+    @Test
+    public void underscored_shouldReturnUnderscoredString() {
+        assertThat(underscored("MozTransform"), equalTo("moz_transform"));
+    }
+
+    @Test
+    public void underscored_shouldReturnEmptyStringIfEmptyStringPassedIn() {
+        assertThat(underscored(""), equalTo(""));
+    }
+
+    @Test
+    public void underscored_shouldReturnNullIfNullPassedIn() {
+        assertThat(underscored(null), equalTo(""));
+    }
+
+    @Test
+    public void underscored_shouldUnderscoreInputString() throws Exception {
+//        assertThat(underscored("foo-bar-baz"), equalTo("foo_bar_baz"));
+        assertThat(underscored("fooBarBaz"), equalTo("foo_bar_baz"));
+//        assertThat(underscored("FooBarBaz"), equalTo("foo_bar_baz"));
+//        assertThat(underscored(" foo   bar baz  "), equalTo("foo_bar_baz"));
+    }
+
+    @Test
+    public void zip_shouldReturnEmptyList_whenNullOrEmptyIsPassedIn() {
+        assertThat(zip("a", null), is(empty()));
+        assertThat(zip("", "a"), is(empty()));
+    }
+
+    @Test
+    public void zip_shouldReturnListOfOneElement_forSimplestValidInput() {
+        assertThat(zip("a", "b"), equalTo(asList("ab")));
+    }
+
+    @Test
+    public void zip_shouldReturnExpectedListOfPairs_whenBothInputsHaveSameSize() {
+        assertThat(zip("abc", "def"), equalTo(asList("ad", "be", "cf")));
+        assertThat(zip("ABC", "DEF"), equalTo(asList("AD", "BE", "CF")));
+    }
+
+    @Test
+    public void zip_shouldReturnExpectedListOfPairs_whenFirstInputIsBiggerThanSecond() {
+        assertThat(zip("abc", "d"), equalTo(asList("ad")));
+        assertThat(zip("ABCDE", "FGH"), equalTo(asList("AF", "BG", "CH")));
+    }
+
+    @Test
+    public void zip_shouldReturnExpectedListOfPairs_whenSecondInputIsBiggerThanFirst() {
+        assertThat(zip("d", "abc"), equalTo(asList("da")));
+        assertThat(zip("FGH", "ABCDE"), equalTo(asList("FA", "GB", "HC")));
+    }
+
+    @Test
+    public void zip_shouldReturnExpectedListOfTriplets_whenThreeInputs() {
+        assertThat(zip("abc", "def", "ghi"), equalTo(asList("adg", "beh", "cfi")));
+    }
+
+    @Test
+    public void zip_shouldReturnExpectedListOfTuples_whenMoreThanThreeInputs() {
+        assertThat(zip("abc", "def", "ghi", "123"), equalTo(asList("adg1", "beh2", "cfi3")));
+    }
+
+    @Test
+    public void zip_shouldReturnEmptyList_whenNotEnoughInputs() {
+        assertThat(zip(), is(empty()));
+    }
+
+    @Test
+    public void zip_shouldReturnInputInListForm_whenOnlyOneInput() {
+        assertThat(zip("zip"), is(equalTo(asList("z", "i", "p"))));
+        assertThat(zip("z"), is(equalTo(singletonList("z"))));
+    }
+
+    @Test
+    public void lines_shouldReturnEmptyArrayWhenInputIsNull() throws Exception {
+        assertThat(lines(null), emptyArray());
+    }
+
+    @Test
+    public void lines_shouldReturnArrayWithOneEmptyElementWhenInputIsEmptyString() throws Exception {
+        assertThat(lines(""), arrayWithSize(1));
+        assertThat(lines(""), hasItemInArray(""));
+    }
+
+    @Test
+    public void lines_shouldSplitToLines() throws Exception {
+        assertThat(lines("Hello\r\nWorld").length, equalTo(2));
+        assertThat(lines("Hello\rWorld").length, equalTo(2));
+        assertThat(lines("Hello World").length, equalTo(1));
+        assertThat(lines("\r\n\n\r ").length, equalTo(4));
+        assertThat(lines("Hello\r\r\nWorld").length, equalTo(3));
+        assertThat(lines("Hello\r\rWorld").length, equalTo(3));
+    }
+
+    @Test
+    public void humanize_shouldHumanizeStrings() throws Exception {
+        assertThat(humanize("the_humanize_method"), equalTo("The humanize method"));
+        assertThat(humanize("ThehumanizeMethod"), equalTo("Thehumanize method"));
+        assertThat(humanize("ThehumanizeMethod"), equalTo("Thehumanize method"));
+        assertThat(humanize("the humanize  method"), equalTo("The humanize method"));
+        assertThat(humanize("the humanize_id  method_id"), equalTo("The humanize id method id"));
+        assertThat(humanize("the  humanize  method  "), equalTo("The humanize method"));
+        assertThat(humanize("   capitalize dash-CamelCase_underscore trim  "), equalTo("Capitalize dash camel case underscore trim"));
+        assertThat(humanize(""), equalTo(""));
+        assertThat(humanize(null), equalTo(""));
+    }
+
+    @Test
+    public void dasherize_shouldDasherizeInputString() throws Exception {
+        assertThat(dasherize("the_dasherize_string_method"), equalTo("the-dasherize-string-method"));
+        assertThat(dasherize("TheDasherizeStringMethod"), equalTo("the-dasherize-string-method"));
+        assertThat(dasherize("thisIsATest"), equalTo("this-is-a-test"));
+        assertThat(dasherize("this Is A Test"), equalTo("this-is-a-test"));
+        assertThat(dasherize("thisIsATest123"), equalTo("this-is-a-test123"));
+        assertThat(dasherize("123thisIsATest"), equalTo("123this-is-a-test"));
+        assertThat(dasherize("the dasherize string method"), equalTo("the-dasherize-string-method"));
+        assertThat(dasherize("the  dasherize string method  "), equalTo("the-dasherize-string-method"));
+        assertThat(dasherize("input with a-dash"), equalTo("input-with-a-dash"));
+        assertThat(dasherize(""), equalTo(""));
+        assertThat(dasherize(null), equalTo(""));
+    }
+
+    @Test
+    public void swapCase_shouldSwapCaseOfCharacters() throws Exception {
+        assertThat(swapCase("AaBbCcDdEe"), equalTo("aAbBcCdDeE"));
+        assertThat(swapCase("Hello World"), equalTo("hELLO wORLD"));
+        assertThat(swapCase(""), equalTo(""));
+        assertThat(swapCase(null), equalTo(""));
+    }
+
+    @Test
+    public void chop_shouldChopStringByStep() throws Exception {
+        assertThat(chop(null, 2).length, equalTo(0));
+        assertThat(chop("whitespace", 2).length, equalTo(5));
+        assertThat(chop("whitespace", 3).length, equalTo(4));
+        assertThat(chop("whitespace", 0)[0].length(), equalTo(10));
+    }
 }