用Lodash将对象的键转换为具有键值的数组 [英] Convert object key to array with values number of key with Lodash

问题描述

我有一个与产品有关的对象

I have an object with products:

products: {
  bread: 1,
  milk: 2,
  cheese: 2,
  chicken: 1,
}

我想要一个数组，其产品名称如下:

I would like to have an array with the name of products like this:

products: ['bread', 'milk', 'milk', 'cheese', 'cheese', 'chicken']

我试图将lodash与reduce方法一起使用，但是我不知道如何在阵列中将该乘积相乘".

I was trying to use lodash with reduce method but I don't know how to "multiply" this product in array.

我认为这不是一个好主意:

I think this is not a good idea:

_.reduce(products, (result, value, key) => {
  for(let i = 0; i < value; i++) {
   result.push(key);
  }
  return result;
}, [])

因此，如果有人可以提供帮助，我将不胜感激.

So if anyone could help, I will be grateful.

推荐答案

您可以使用该对象的条目

const products = {
  bread: 1,
  milk: 2,
  cheese: 2,
  chicken: 1,
}

const output = Object.entries(products).flatMap(([k, v]) => Array(v).fill(k))

console.log(output)

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