本文介绍了过滤以JavaScript中的字母开头的列表元素的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试将以'N'开头的列表元素整理成新列表。
为什么这不起作用?
I am trying to sort out list elements that starts with 'N' into a new list.Why won't this work?
const countries = ['Norway', 'Sweden', 'Denmark', 'New Zealand'];
function firstN(){
for (let i=0;i<countries.length;i++){
countries[i].startsWith("N")
}
}
let startsWithN = countries.filter(firstN())
推荐答案
这与@ adeneo的回答大致相同,只是一点点:
This is roughly the same as @adeneo's answer, just a little terser:
const countries = ['Norway', 'Sweden', 'Denmark', 'New Zealand'];
const startsWithN = countries.filter((country) => country.startsWith("N"));
console.log(startsWithN);
// Output: [ 'Norway', 'New Zealand' ]
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