The some() method checks if any of the elements in an array pass a test (provided as a function).The some() method executes the function once for each element present in the array:If it finds an array element where the function returns a true value, some() returns true (and does ...
在JavaScript 数组操作中,some() 是一个高效的条件检测方法,而 any() 并非原生存在的方法。本文将通过功能解析、语法对比和应用场景,揭示两者的本质差异,并说明如何正确使用这类工具提升代码效率。一、some() 方法的核心功能与实现some() 是JavaScript...
JavaScript Array some() 方法 JavaScript Array 对象 实例 检测数组中是否有元素大于 18: var ages = [3, 10, 18, 20];function checkAdult(age) { return age >= 18;}function myFunction() { docume..
somereturns abooleanvalue after passing each item in the source array through the test function that you pass in as the first parameter. This makes it well suited to the types of queries that require a simpleyesornoanswer. In this lesson we look at 2 practical use-cases forsome. The firs...
The some() method checks if any array elements pass a test (provided as a callback function).The some() method executes the callback function once for each array element.The some() method returns true (and stops) if the function returns true for one of the array elements.The some() ...
JavaScript Array some() 方法JavaScript Array 对象实例检测数组中是否有元素大于 18:var ages = [3, 10, 18, 20];function checkAdult(age) { return age >= 18;}function myFunction() { document.getElementById("demo").innerHTML = ages.some(checkAdult);...
somereturns abooleanvalue after passing each item in the source array through the test function that you pass in as the first parameter. This makes it well suited to the types of queries that require a simpleyesornoanswer. In this lesson we look at 2 practical use-cases forsome. The firs...
JavaScript Array 对象方法太多了,短时间内记不住的,可以每天学几个日积月累,来学习几个常用的方法吧 ! 1. some() 检测数组中的元素是否满足指定条件 用于检测数组中的元素是否满足指定条件,比如: 判断数组中是否存在大于 10 的数组元素 该方法会依次执行数组的每个元素,如果有一个元素满足条件,则返回 true , ...
console.log("element:"+element+",index:"+index+",array:"+array); if(element>1){ return true; } } var ret = [1,2,3].some(testSome); console.log(ret); 在浏览器的运行结果(2大于1,就返回): 如果未设置返回true的条件语句,如下代码(去掉if语句,会执行全部有值元素,最后返回false): fun...
在Array.some 中正确使用 async 使用Promise检查集合 本文译自:How to use async functions with Array.some and every in Javascript - 在第一篇文章中, 我们介绍了async / await 如何帮助执行异步命令 ,但是在异步处理集合时却无济于事。在这篇文章中,当结果为布尔值时,我们将研究some和every函数用于更有效的...