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
int indexOf(Object element, [int start = 0]) { if (start < 0) start = 0; for (int i = start; i < this.length; i++) { if (this[i] == element) return i; } return -1; }
© 2012 the Dart project authors
Licensed under the Creative Commons Attribution-ShareAlike License v4.0.
https://api.dartlang.org/stable/2.0.0/dart-collection/ListMixin/indexOf.html