indexOf method

Returns the first index of [element] in this list.

int indexOf(
Object element,
[int startIndex = 0]
)

Returns the first index of [element] in this list.

Searches the list from index [start] to the end of the list. The first time an object o is encountered so that o == element, the index of o is returned.

List<String> notes = ['do', 're', 'mi', 're']; notes.indexOf('re'); // 1 notes.indexOf('re', 2); // 3

Returns -1 if [element] is not found.

notes.indexOf('fa'); // -1