Iterations & Loops 使用 JavaScript 时应该记住的 JavaScript 中最重要和最基本的概念之一是迭代。 作为程序员,我们经常负责重复某些过程/代码块或为特定的值集提供条件,以实现最佳应用程序性能和地址代码可读性。 在处理大量数据时,代码可读性成为一个问题,您很容易发现自己被时间所消耗。 为了减少时间消耗,迭代对我们...
Loops and Iterations Function arguments对象 函数参数 (Fat) Arrow Functions Working with objects Classes Extends and inheritance Promise async/await Iterator/Generator JavaScript元级别编程(元编程) Proxies 可撤销的Proxy(Revokable Proxy) Reflection 模块 import maps 在HTML中使用module modules与普通脚本的区别 ...
然后,阅读 MDN 的JavaScript 指南中的以下部分: Grammar and types (语法和类型) Control flow and error handling (控制流程和错误处理) Loops and iterations (循环和迭代) Functions(函数) 不要太担心记住特定的语法,你可以随时查一下文档。相反,应该专注于理解重要的概念,比如变量实例化、循环和函数。如果知识密...
To get the gist of it, let’s say we want to double the array and get back the result; using the map function, we can do that like this:[1, 2, 3].map((a) => { return a * a }) =>[1, 4, 9] The interesting point to note here is that map calls the function with thre...
This loop iterates through the fruits array and prints each element to the console. More on JavaScript for loop Nested for Loops A for loop can also have another for loop inside it. For each cycle of the outer loop, the inner loop completes its entire sequence of iterations. For exampl...
// Initialize a for statement with 5 iterationsfor(leti=0;i<4;i++){console.log(i);} Copy First, we are declaringiand setting it to0. Then, we are setting a condition for the loop to run untiliis less than4. Finally, we’re incrementingiby one 1 each iteration. Our code block ...
So when do we useforand whenwhile? If the number of iterations is known use theforloop. If you want to loop until a certain condition is met use thewhileloop. for in # Afor-inloop iterates through the properties of an object and executes the loop's body once for each enumerable pro...
Syntax, data types, prototype-based programming, for loops, asynchronous and parallel execution, Node JS, npm, Deno, TypeScript, WebAssembly
In nested loops, it's possible to skip iterations of the outer loop by using alabeled continue statement. Working of labeled break statement in JavaScript Let's look at an example. outerloop:for(leti =1; i <=3; i++) {innerloop:for(letj =1; j <=3; j++) {if(j ===2) {continu...
Generators allow you to hook together multiple generators with theyield*syntax. This allows you to branch off into many different types of iterations within the main iteration and covers complex scenarios where you usually end up reaching for nested for loops. ...