jsCopy to Clipboard function walkTree(node) { if (node === null) { return; } // 对节点做些什么 for (let i = 0; i < node.childNodes.length; i++) { walkTree(node.childNodes[i]); } } 跟loop 函数相比,这里每个递归调用都产生了更多的递归调用。
for...of 语句执行一个循环,该循环处理来自可迭代对象的值序列。可迭代对象包括内置对象的实例,例如 Array、String、TypedArray、Map、Set、NodeList(以及其他 DOM 集合),还包括 arguments 对象、由生成器函数生成的生成器,以及用户定义的可迭代对象。
Get CSSStyleSheet objects with for loop jsCopy to Clipboard const styleSheet = []; const styleSheets = document.styleSheets; for (let i = 0; i < styleSheets.length; i++) { styleSheet.push(styleSheets[i]); } Get all CSS rules for the document using Array methods jsCopy to Clipboard co...
The comma (,) operator evaluates each of its operands (from left to right) and returns the value of the last operand. This is commonly used to provide multiple updaters to a for loop's afterthought.
These statements define a getter and setter for the year property: js> var d = Date.prototype; js> Object.defineProperty(d, "year", { get: function() {return this.getFullYear() }, set: function(y) { this.setFullYear(y) } }); ...
JavaScript (JS) is a lightweight, interpreted, programming language with first-class functions. While it is most well-known as the scripting language for Web pages, many non-browser environments also use it, such as node.js and Apache CouchDB. JS is a prototype-based, multi-paradigm, ...
Using take() with a for...of loop What information was incorrect, unhelpful, or incomplete? Becausefibonacci()is an infinite iterator, you can't use aforloop to iterate it directly. You absolutely can, provided that you eventually break out of the loop through some means such asbreak,retur...
loop();},delay);})(); In the above snippet, a named functionloop()is declared and is immediately executed.loop()is recursively called insidesetTimeout()after the logic has completed executing. While this pattern does not guarantee execution on a fixed interval, it does guarantee that the ...
AllowShortLoopsOnASingleLine:falseAllowShortFunctionsOnASingleLine:falseAllowShortIfStatementsOnASingleLine:false ClangFormat将扫描父目录中的.clang-format文件,该文件指定了确切的格式化规则。这使我们能够自定义每个细节。在我的案例中,我从 Google 的编码风格开始,并做了一些调整:140 字符列限制,不使用制表符,不...
循环(Loop)上面代码中有一部分需要我们仔细研读,那就是 for 循环。 循环是一个非常重要的编程概念,它让你能够重复运行一段代码,直到满足某个条件为止。首先,请再次转到 浏览器开发工具 JavaScript 控制台 然后输入以下内容:for (let i = 1; i < 21; i++) { console.log(i); } ...