从数组中获取最接近的数字 [英] Get the closest number out of an array

问题描述

我有一个从负 1000 到正 1000 的数字，我有一个包含数字的数组.像这样:

I have a number from minus 1000 to plus 1000 and I have an array with numbers in it. Like this:

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

我希望我得到的数字更改为数组中最近的数字.

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

例如我得到 80 作为数字我希望它得到 82.

For example I get 80 as number I want it to get 82.

推荐答案

ES5 版本:

var counts = [4, 9, 15, 6, 2],
  goal = 5;

var closest = counts.reduce(function(prev, curr) {
  return (Math.abs(curr - goal) < Math.abs(prev - goal) ? curr : prev);
});

console.log(closest);

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