获取数组中最接近(但更高)的数字 [英] Get closest (but higher) number in an array

问题描述

我有一个数字说 165

I have a number say 165

我有一个包含数字的数组.像这样:

I have an array with numbers in it. Like this:

[2, 42, 82, 122, 162, 202, 242, 282, 322, 362]

[2, 42, 82, 122, 162, 202, 242, 282, 322, 362]

我希望我得到的数字更改为最接近但更高的数组数字.

I want that the number I've got changes to the nearest, but higher number of the array.

例如我得到 165 它应该达到 202

For example I get 165 it should go tot 202

javascript 数组

javascript arrays

推荐答案

这是一个使用 Array.forEach() 的方法:

Here's a method using Array.forEach():

const number = 165;
const candidates = [2, 42, 82, 122, 162, 202, 242, 282, 322, 362];

//looking for the lowest valid candidate, so start at infinity and work down
let bestCandidate = Infinity;

//only consider numbers higher than the target
const higherCandidates = candidates.filter(candidate => candidate > number);

//loop through those numbers and check whether any of them are better than
//our best candidate so far
higherCandidates.forEach(candidate => {
    if (candidate < bestCandidate) bestCandidate = candidate;
});

console.log(bestCandidate); //the answer, or Infinity if no valid answers exist

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