mout/object/flatten.js

Modular Utilities

"use strict";
exports.__esModule = true;
var forOwn_1 = require("./forOwn");
var isPlainObject_1 = require("../lang/isPlainObject");
/*
 * Helper function to flatten to a destination object.
 * Used to remove the need to create intermediate objects while flattening.
 */
function flattenTo(obj, result, prefix, level) {
    forOwn_1["default"](obj, function (value, key) {
        var nestedPrefix = prefix ? prefix + "." + key : key;
        if (level !== 0 && isPlainObject_1["default"](value)) {
            flattenTo(value, result, nestedPrefix, level - 1);
        }
        else {
            result[nestedPrefix] = value;
        }
    });
    return result;
}
/**
 * Recursively flattens an object.
 * A new object containing all the elements is returned.
 * If level is specified, it will only flatten up to that level.
 */
function flatten(obj, level) {
    if (obj == null) {
        return {};
    }
    level = level == null ? -1 : level;
    return flattenTo(obj, {}, '', level);
}
exports["default"] = flatten;