fjs.first in array

Jump to
  1. 1. fjs.first
    1. 1.1. Usage
    2. 1.2. Example

fjs.first

  • Alias: fjs.head
  • Alias: fjs.take

fjs.first returns the first item in a list that returns true for the iterator function. Can be curried by default.

Usage

fjs.first(iterator, items);

Example

var even = function (item) {
    return item % 2 === 0;
};
var odd = function (item) {
    return item % 2 !== 0;
};
var firstEven = fjs.first(even);
var firstOdd = fjs.first(odd);
firstEven([5, 4, 3, 2, 1]); // => 4
firstOdd([5, 4, 3, 2, 1]); // => 5