description

# contains abstract method

bool contains(

1. Pattern other, [
2. int startIndex = 0

])

Whether this string contains a match of `other`.

Example:

    const string = 'Dart strings';
    final containsD = string.contains('D'); // true
    final containsUpperCase = string.contains(RegExp(r'[A-Z]')); // true

If `startIndex` is provided, this method matches only at or after that index:

    const string = 'Dart strings';
    final containsD = string.contains(RegExp('D'), 0); // true
    final caseSensitive = string.contains(RegExp(r'[A-Z]'), 1); // false

The `startIndex` must not be negative or greater than length.

## Implementation

    bool contains(Pattern other, [int startIndex = 0]);