toCamelCase function

String toCamelCase(String? input)

Converts a string input to camel case format.

If the input is null or empty, an empty string is returned. The function trims leading and trailing whitespace from the input and splits it into an array of words using underscores, spaces, and hyphens as delimiters. It then converts the first word to lowercase and appends the capitalized version of each subsequent word (except the first word) to the result. The remaining characters in each word are converted to lowercase.

Example: toCamelCase('hello_world') => 'helloWorld' toCamelCase('hello-world') => 'helloWorld' toCamelCase('hello world') => 'helloWorld' toCamelCase('HelloWorld') => 'helloWorld'

Returns the converted string in camel case format.

Implementation

String toCamelCase(String? input) {
  if (input == null || input.isEmpty) return '';

  final words = input.trim().split(RegExp(r'[_\s-]+|(?<=[a-z])(?=[A-Z])'));
  final buffer = StringBuffer()..write(words[0].toLowerCase());

  for (var i = 1; i < words.length; i++) {
    if (words[i].length > 1) {
      buffer
        ..write(words[i][0].toUpperCase())
        ..write(words[i].substring(1).toLowerCase());
    } else {
      buffer.write(words[i].toUpperCase());
    }
  }

  return buffer.toString();
}