added toCamelCase

Author: Anas35

lib/super_string.dart

@@ -179,7 +179,7 @@ extension SuperString on String {
 
  /// Return a `String` of specified length width which is align in center, using the specified
  /// character.
- /// 
+ ///
  /// The default value of character is space ' '.
  ///
  /// Example :
@@ -192,8 +192,7 @@ extension SuperString on String {
  /// Throws an [AssertionError] if character's length is greater than 1.
  ///
  String center(int length, [String character = ' ']) {
- assert(character.length <= 1,
- "character's length should be equal to 1");
+ assert(character.length <= 1, "character's length should be equal to 1");
 
  StringBuffer str = StringBuffer();
  String char = character;
@@ -222,7 +221,7 @@ extension SuperString on String {
  /// ```
  ///
  int count(String value, [int start = 0, int? end]) =>
- value.allMatches(this.substring(start , end)).length;
+ value.allMatches(this.substring(start, end)).length;
 
  /// expandTabs method sets the tab size to the specified number of whitespaces.
  ///
@@ -236,4 +235,42 @@ extension SuperString on String {
  ///
  String expandTabs([int? size]) =>
  size == null ? this : this.replaceAll('\t', ' ' * (size - 1));
+
+ /// Convert the given string to camelCase.
+ ///
+ /// By default `isLowerCamelCase` is set as `false` and the given string is converted into UpperCamelCase.
+ /// That means the first letter of String is converted into upperCase.
+ ///
+ /// If the `isLowerCamelCase` is set to `true` then camelCase produces lowerCamelCase.
+ /// That means the first letter of String is converted into lowerCase.
+ ///
+ /// If the String is empty, this method returns `this`.
+ ///
+ /// Example :
+ ///
+ /// ```
+ /// print('hello World'.toCamelCase()); // HelloWorld
+ /// print('hello_World'.toCamelCase()); // HelloWorld
+ /// print('hello World'.toCamelCase(isLowerCamelCase: true)); // helloWorld
+ /// ```
+ ///
+ String toCamelCase({bool isLowerCamelCase = false}) {
+ if (this.isEmpty) return this;
+
+ StringBuffer str = StringBuffer();
+
+ isLowerCamelCase
+ ? str.write(this[0].toLowerCase())
+ : str.write(this[0].toUpperCase());
+
+ for (int i = 1; i < this.length; i++) {
+ if (this[i] == ' ' || this[i] == '_') {
+ str.write(this[i + 1].toUpperCase());
+ } else {
+ if (this[i - 1] != ' ' && this[i - 1] != '_')
+ str.write(this[i].toLowerCase());
+ }
+ }
+ return str.toString();
+ }
 }