在本书中运行示例代码最简单的方法——也是进行实验的方法——是在eloquentjavascript.net的在线版本中查找它。你可以单击任何代码示例进行编辑和运行,并查看它产生的输出。要进行练习,请访问eloquentjavascript.net/code,该网站提供每个编码练习的起始代码,并允许你查看解决方案。 在本书的网站之外运行本书定义
函数源自Function.prototype,数组源自Array.prototype。 console.log(Object.getPrototypeOf(Math.max) ==Function.prototype);// → trueconsole.log(Object.getPrototypeOf([]) ==Array.prototype);// → true 这样的原型对象本身也将拥有一个原型,通常是Object.prototype,这样它仍然间接提供像toString这样的函数。 你...
</script> // 那些老旧的实例可能会在 <script> 标签中使用 type="text/javascript"。现在已经不必这样做了。JavaScript 是所有现代浏览器以及 HTML5 中的默认脚本语言。 1. 2. 3. 4. <body>中的 JavaScript <!DOCTYPE html> <html> <body> <script> document.write("<h1>这是一个标题</h1>"); docu...
With `select()`With `update()`With `delete()`With `rpc()` 1 2 3 4 const { data, error } = await supabase .from('characters') .select('name, book_id') .in('name', ['Harry', 'Hermione']) Column contains every element in a value .contains() can work on array columns or ra...
In JavaScript, if we had a variable name with value '"Harry"' and wanted to print out "Hello, Tom!", we would need to writeconsole.log("Hello, " + name + "!"); "Hello, Harry!"That's not too bad, but if you start doing this with multiple variables, it can get a little ...
Run Code Output Harry 5 Hiss Arnold 8 Neigh Note:The difference betweencall()andapply()is thatcall()accepts an argument list, whileapply()accepts a singlearrayof arguments. Also Read: JavaScript Function apply()
import{User,UserJSON}from"./user.pb.js";constuser={firstName:"Harry",lastName:"Potter",active:true,locations:["Hogwarts"],projects:{DA: "Dumbledore's Army },manager:{firstName:"Albus",lastName:"Dumbledore",}}// protocol buffersconstbytes=User.encode(user);console.log(bytes);// Uint8Ar...
quokkajs by @wallabyjs is pretty damn great to use within @code. found this through seeing @mpjme use it on his video. really really neat. https://t.co/8olWgHAaqW— Harry Wolff (@hswolff) November 21, 2017 just bought Quokka.js pro for VSCode. This is a very cool javascript RE...
ExampleTry this code » function sortNames(...names) { return names.sort(); } alert(sortNames("Sarah", "Harry", "Peter")); // Harry,Peter,Sarah alert(sortNames("Tony", "Ben", "Rick", "Jos")); // John,Jos,Rick,TonyWhen the rest parameter is the only parameter in a ...
<button onclick="myFunction('Harry Potter','Wizard')">点击这里</button> <button onclick="myFunction('Bob','Builder')">点击这里</button> 根据点击的不同的按钮,上面的例子会提示 "Welcome Harry Potter, the Wizard" 或 "Welcome Bob, the Builder"。