indexOf.js•863 B
var _curry2 = require('./internal/_curry2');
var _indexOf = require('./internal/_indexOf');
var _isArray = require('./internal/_isArray');
/**
* Returns the position of the first occurrence of an item in an array, or -1
* if the item is not included in the array. `R.equals` is used to determine
* equality.
*
* @func
* @memberOf R
* @since v0.1.0
* @category List
* @sig a -> [a] -> Number
* @param {*} target The item to find.
* @param {Array} xs The array to search in.
* @return {Number} the index of the target, or -1 if the target is not found.
* @see R.lastIndexOf
* @example
*
* R.indexOf(3, [1,2,3,4]); //=> 2
* R.indexOf(10, [1,2,3,4]); //=> -1
*/
module.exports = _curry2(function indexOf(target, xs) {
return typeof xs.indexOf === 'function' && !_isArray(xs) ?
xs.indexOf(target) :
_indexOf(xs, target, 0);
});