Tag: javascript objects

地图与对象在ES6，何时使用？: 参考：MDN地图当键未知时，使用映射到对象上，直到运行时，以及所有键都是相同types，并且所有值都是相同types。当存在对单个元素进行操作的逻辑时使用对象。题：什么是在地图上使用对象的适用示例？特别是“什么时候键直到运行时才知道？” var myMap = new Map(); var keyObj = {}, keyFunc = function () { return 'hey'}, keyString = "a string"; // setting the values myMap.set(keyString, "value associated with 'a string'"); myMap.set(keyObj, "value associated with keyObj"); myMap.set(keyFunc, "value associated with keyFunc"); console.log(myMap.get(keyFunc));

在bash脚本函数中使用curl POST来定义variables: 当我回应我得到这个，当我进入terminal时运行 curl -i \ -H "Accept: application/json" \ -H "Content-Type:application/json" \ -X POST –data '{"account":{"email":"akdgdtk@test.com","screenName":"akdgdtk","type":"NIKE","passwordSettings":{"password":"Starwars1","passwordConfirm":"Starwars1"}},"firstName":"Test","lastName":"User","middleName":"ObiWan","locale":"en_US","registrationSiteId":"520","receiveEmail":"false","dateOfBirth":"1984-12-25","mobileNumber":"9175555555","gender":"male","fuelActivationDate":"2010-10-22","postalCode":"10022","country":"US","city":"Beverton","state":"OR","bio":"This is a test user","jpFirstNameKana":"unsure","jpLastNameKana":"ofthis","height":"80","weight":"175","distanceUnit":"MILES","weightUnit":"POUNDS","heightUnit":"FT/INCHES"}' https://xxx:xxxxx@xxxx-www.xxxxx.com/xxxxx/xxxx/xxxx 但是当在bash脚本文件中运行时，我得到这个错误 curl: (6) Could not resolve host: application; nodename nor servname provided, or not known curl: (6) Could not resolve host: is; nodename nor servname provided, or not known curl: (6) Could not resolve host: […]

将JavaScript对象编码为Jsonstring: 我想将一个JavaScript对象编码成一个JSONstring，而且我遇到了相当多的困难。对象看起来像这样 new_tweets[k]['tweet_id'] = 98745521; new_tweets[k]['user_id'] = 54875; new_tweets[k]['data']['in_reply_to_screen_name'] = "other_user"; new_tweets[k]['data']['text'] = "tweet text"; 我想要得到这个到一个JSONstring，把它放入一个AJAX请求。 {'k':{'tweet_id':98745521,'user_id':54875, 'data':{…}}} 你得到的照片。不pipe我做什么，这都行不通。所有的JSON编码器，如json2等产生 [] 那么，这并不能帮助我。基本上我想有像php encodejson函数的东西。

在JavaScript中用{}或新的Object（）创build一个空对象？: 有两种不同的方法可以在JavaScript中创build一个空对象： var objectA = {} var objectB = new Object() 脚本引擎如何处理它们有什么不同？有没有任何理由相互使用？同样，也可以使用不同的语法创build一个空数组： var arrayA = [] var arrayB = new Array()

如何从JavaScript对象中移除一个属性？: 说我创build一个对象如下： var myObject = { "ircEvent": "PRIVMSG", "method": "newURI", "regex": "^http://.*" }; 如何删除属性regex以最终的新myObject的最佳方式是什么？ var myObject = { "ircEvent": "PRIVMSG", "method": "newURI" };