zipWith.js•1.06 kB
var _curry3 = require('./internal/_curry3');
/**
* Creates a new list out of the two supplied by applying the function to each
* equally-positioned pair in the lists. The returned list is truncated to the
* length of the shorter of the two input lists.
*
* @function
* @memberOf R
* @since v0.1.0
* @category List
* @sig (a,b -> c) -> [a] -> [b] -> [c]
* @param {Function} fn The function used to combine the two elements into one value.
* @param {Array} list1 The first array to consider.
* @param {Array} list2 The second array to consider.
* @return {Array} The list made by combining same-indexed elements of `list1` and `list2`
* using `fn`.
* @example
*
* var f = (x, y) => {
* // ...
* };
* R.zipWith(f, [1, 2, 3], ['a', 'b', 'c']);
* //=> [f(1, 'a'), f(2, 'b'), f(3, 'c')]
*/
module.exports = _curry3(function zipWith(fn, a, b) {
var rv = [];
var idx = 0;
var len = Math.min(a.length, b.length);
while (idx < len) {
rv[idx] = fn(a[idx], b[idx]);
idx += 1;
}
return rv;
});