从键值是空数组的JS对象中删除 [英] Remove from JS object where key value is an empty array

问题描述

我正在尝试从值为Array(0)的对象中删除键.这是对象:

I'm trying to remove keys from an object where the values is Array(0). Here's the object:

{fruit: Array(1), dairy: Array(2), vegetables: Array(0)}

这是理想的结果:

{fruit: Array(1), dairy: Array(2)}

到目前为止，我一直在使用delete运算符和.filter/.reduce方法.

So far, I've been playing with the delete operator and .filter/.reduce methods.

任何帮助都会很棒:)

推荐答案

只需遍历对象的键，检查该键的值是否为空数组，如果是，则将其删除:

Just iterate over the keys of the object, check if the value for that key is an empty array and if so, delete it:

let obj = {
  a: [1],
  b: [],
  c: 5,
  d: false
}

for (const key in obj) { if (Array.isArray(obj[key]) && !obj[key].length) delete obj[key] };

console.log(obj);

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