indexOf

Find first index of a value.

Alternatives: indexOf, lastIndexOf.
Similar: search, indexOf, hasValue, includes.

function indexOf(x, v, i)
// x: an iterable
// v: search value
// i: start index [0]

const xiterable = require('extra-iterable');

var x = [1, 2, 3, 2, 5];
xiterable.indexOf(x, 2);
// → 1      ^

var x = [1, 2, 3, 2, 5];
xiterable.indexOf(x, 2, 2);
// → 3            ^

References

• List-Extra.elemIndex: elm
• Array.prototype.indexOf: MDN web docs