toSnakeCase method

String toSnakeCase({
  1. String separator = '_',
})

Converts a string from camelCase to snake_case.

Example:

'helloWorld'.toSnakeCase( ) ;  // 'hello_world'
'userProfileData'.toSnakeCase( ) ;  // 'user_profile_data'
'HelloWorld'.toSnakeCase( ) ;  // 'hello_world'

Implementation

String toSnakeCase({String separator = '_'}) {
  return this
      .replaceAll(RegExp(r'\s+'), '_')
      .replaceAllMapped(
          RegExp(r'[A-Z]'), (match) => '_' + match.group(0)!.toLowerCase())
      .replaceAll(RegExp(r'^_'), '')
      .replaceAll(RegExp(r'_+'), '_');
}