description

# contains method Null safety

bool contains (

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

)

Returns true if this string contains a match of `other`:

    var string = 'Dart strings';
    string.contains('D');                     // true
    string.contains(new RegExp(r'[A-Z]'));    // true

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

    string.contains('X', 1);                  // false
    string.contains(new RegExp(r'[A-Z]'), 1); // false

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

## Implementation

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