replaceFirstWhere method

@useResult IList<T> replaceFirstWhere(bool test(T item), T replacement(T? item), { bool addIfNotFound = false, })

Finds the first item that satisfies the provided test, and replace it with the result of replacement.

• If addIfNotFound is false, return the unchanged list if no item satisfies the test.

• If addIfNotFound is true, add the replacement to the end of the list if no item satisfies the test.

Implementation

@useResult
IList<T> replaceFirstWhere(
  bool Function(T item) test,
  T Function(T? item) replacement, {
  bool addIfNotFound = false,
}) {
  final int index = indexWhere(test);
  return (index != -1)
      ? put(index, replacement(this[index]))
      : addIfNotFound
          ? add(replacement(null))
          : this;
}