/**
 * @fileoverview This module provides a bind() function for context binding.
 * @author NHN.
 *         FE Development Lab <dl_javascript@nhn.com>
 */

'use strict';

/**
 * Create a new function that, when called, has its this keyword set to the provided value.
 * @param {function} fn A original function before binding
 * @param {*} obj context of function in arguments[0]
 * @returns {function()} A new bound function with context that is in arguments[1]
 * @memberof tui.util
 */
function bind(fn, obj) {
    var slice = Array.prototype.slice;
    var args;

    if (fn.bind) {
        return fn.bind.apply(fn, slice.call(arguments, 1));
    }

    /* istanbul ignore next */
    args = slice.call(arguments, 2);

    /* istanbul ignore next */
    return function() {
        /* istanbul ignore next */
        return fn.apply(obj, args.length ? args.concat(slice.call(arguments)) : arguments);
    };
}

module.exports = {
    bind: bind
};