ut2/lib/invert.js

一个现代 JavaScript 实用工具库。[点击查看在线文档]。

'use strict';

var allKeys = require('./allKeys.js');
var helpers = require('./internals/helpers.js');
var native = require('./internals/native.js');

function invert(object, predicate) {
    if (predicate === void 0) { predicate = helpers.stubTrue; }
    var _keys = allKeys(object);
    var result = {};
    _keys.forEach(function (key) {
        var value = object[key];
        if (predicate(value, key)) {
            var valueProp = value != null && typeof value.toString != 'function' ? native.objectProtoToString.call(value) : value;
            result[valueProp] = key;
        }
        else {
            result[key] = value;
        }
    });
    return result;
}

module.exports = invert;