将数组转换为另一个自定义数组 - javascript

Question

我有数组

const array1 = [
  { count: "1", category: "A" },
  { count: "2", category: "B" },
];

我需要将其转换为

const array2 = [
  { name: "1-A" },
  { name: "2-B" },
];

我该怎么做？

Answer 1

您可以使用Array.map方法。 Link: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map

const array1 = [
  { count: "1", category: "A" },
  { count: "2", category: "B" },
];

const array2 = array1.map(item => ({ name : `${item.count}-${item.category}`}))

Answer 2

你循环并分配新值。

多种方式之一：

const array1 = [
    { count: "1", category: "A" },
    { count: "2", category: "B" },
];
const array2 = array1.map(element => {
    return {
        name: `${element.count}-${element.category}`
    }
});
console.log(array2)

Answer 3

作为 Array.map 的替代方法，您可以使用 foreach / push。您可以在 forEach 的回调函数中进行更多控制。

const array1 = [
  { count: "1", category: "A" },
  { count: "2", category: "B" },
];
let array2  =[]
array1.forEach( (data) => 
{
    array2.push({name : `${data.count}-${data.category}`})
})

Answer 4

const array1 = [
  { count: "1", category: "A" },
  { count: "2", category: "B" },
];
var array2 = [],
  newVar;
for (let index = 0; index < array1.length; index++) {
  newVar = array1[index].count + "-" + array1[index].category;
  array2.push({ name: newVar });
}

将数组转换为另一个自定义数组 - javascript

Convert array to another custom array - javascript

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