Returns the first index of element in this list.
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