与push()相反;

Question

我需要关于这个问题的帮助 - "JavaScript push();方法的反义词是什么？"

就像说我有一个阵列 -

var exampleArray = ['remove'];

我想要push();这个词'keep'-

exampleArray.push('keep');

如何'remove'从数组中删除字符串？

Answer 1

push()最后添加; pop()从最后删除.

unshift()加到前面; shift()从前面删除.

splice() 可以随心所欲地做任何事情.

Answer 2

好吧,你有点问过两个问题.push()(题为标题)的反面是pop().

var exampleArray = ['myName'];
exampleArray.push('hi');
console.log(exampleArray);

exampleArray.pop();
console.log(exampleArray);

pop()将删除最后一个元素exampleArray并返回该元素("hi"),但它不会从数组中删除字符串"myName",因为"myName"不是最后一个元素.

你需要的是shift()或splice():

var exampleArray = ['myName'];
exampleArray.push('hi');
console.log(exampleArray);

exampleArray.shift();
console.log(exampleArray);

var exampleArray = ['myName'];
exampleArray.push('hi');
console.log(exampleArray);

exampleArray.splice(0, 1);
console.log(exampleArray);

有关更多数组方法,请参阅:https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array#Mutator_methods