mout/array/toLookup.js

Modular Utilities

"use strict";
exports.__esModule = true;
var isFunction_1 = require("../lang/isFunction");
/**
 * Creates an object that holds a lookup for the objects in the array.
 */
function toLookup(arr, key) {
    var result = {};
    if (arr == null) {
        return result;
    }
    var i = -1;
    var len = arr.length;
    var value;
    if (isFunction_1["default"](key)) {
        while (++i < len) {
            value = arr[i];
            result[key(value)] = value;
        }
    }
    else {
        while (++i < len) {
            value = arr[i];
            result[value[key]] = value;
        }
    }
    return result;
}
exports["default"] = toLookup;