... [good, nice] 但有个事实我们应该注意,比如我用 /good|goodbye/,去匹配 goodbye 字符串时,结果是 good var regex = /good|goodbye/g; var string = goodbye; console.log( string.match(regex) ); // => [good] 而把正则改成 /goodbye|good/...
...mespace test; define(testHELLO,hello world!); define(__NAMESPACE__ . GOODBYE,goodbye cruel world); define(GOODBYE,hahahha); echo HELLO; echo ; echo GOODBYE; echo ; echo GOODBYE; echo ; echo estGO...
开发 JavaScript 时,你有没有遇到过这样的情况。页面复用大量共通组件,这些共通组件大体都在同一个文件夹下。但是由于组件分割和文件夹层级较深的缘故,你尝尝会写出
...w are you)}} class lily extends People{ constructor(){ super()} goodbye(){alert(goodbye)}} 2.解析extends和super() ①在前面的文章中有提及class声明类的原理:https://segmentfault.com/a/11... ②lily是People的子类,首先...
...什么需要装饰器 我们假设你的程序实现了say_hello()和say_goodbye()两个函数。 def say_hello(): print hello! def say_goodbye(): print hello! # bug here if __name__ == __main__: say_hello() say_goodbye() ...
...gen() { yield Hello; yield ; yield World!; return Goodbye Moon!; } $gen = gen(); foreach ($gen as $value) { echo $value; } // Outputs Hello on iteration 1, on iterator 2...
... } export default Welcome; import React, {Component} from react class Goodbye extends Component { constructor(props) { super(props); this.state = { username: ...
... if(typeof name === undefined){ var name = Jack; console.info(Goodbye + name); }else{ console.info(Hello + name); } })(); A.Goodbye Jack B.Hello Jack C.Goodbye undefined D.Hello undefi...
...of name === undefined) { var name = Jack; console.log(Goodbye + name); } else { console.log(Hello + name); } })(); 我还是先说答案吧,可能你们会不相信,答案就是 Goodbye, Jack 为什么会这样呢,因为在...
...} } export default Welcome; import React, {Component} from react class Goodbye extends Component { constructor(props) { super(props); this.state = { username: ...
...r) ); // 可以再次使用吗? Yes! (p → p) // domNode.textContent = Goodbye; ReactDOM.render( Goodbye, document.getElementById(container) ); 这套规则对子树也同样适用。例如,当我们在更新有两个子组件时的,React首先决定是否重用,然后再对每一...
...of name === undefined) { var name = Jack; console.log(Goodbye + name); } else { console.log(Hello + name); } })(); A: Goodbye Jack B: Hello Jack C: Hello undef...
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