javascript将数组的一些元素排序到另一个数组中

Question

对于一个项目，我必须对包含字符串和数字的数组进行排序。该字符串用作应将数字存储到哪个数组中的指示符。let myArray = [22, 'talk', 31, 'perfo', 35, 'init', 42, 'talk']let talk = []let perfo = []let init = []for (let i = 0; i < myArray.length; i + 2) {    if (myArray[i + 1] == 'talk') {        talk.push(myArray[i])    } else if (myArray[i + 1] == 'perfo') {        perfo.push(myArray[i])    } else if (myArray[i + 1] == 'init') {        init.push(myArray[i])    } else {}}预期结果 ：talk [22, 42], perfo [35], init [42]但不知何故，它似乎甚至没有通过 for 循环。

Answer 1

对象与数组相同，但不是以数字作为索引，而是具有字符串，因此我们可以使用对象来重构初始数组。

let myArray = [22, 'talk', 31, 'perfo', 35, 'init', 42, 'talk']

let arrays = {}

for (let i = 0; i < myArray.length; i+=2) {

  const arrayName = myArray[i+1];

  

  if (arrays[arrayName]) {

    arrays[arrayName].push(myArray[i])

  } else {

    arrays[arrayName] = [myArray[i]]

  }

}

console.log(arrays);

// [object Object] {

//  init: [35],

//  perfo: [31],

//  talk: [22, 42]

// }

Answer 2

您可以获取带有所需数组的对象并将值推送给它。

let data = [22, 'talk', 31, 'perfo', 35, 'init', 42, 'talk'],

    talk = [],

    perfo = [],

    init = [],

    temp = { talk, perfo, init },

    i = 0;

while (i < data.length) {

    let [value, key] = data.slice(i, i += 2);

    temp[key].push(value);

}

console.log(talk);

console.log(perfo);

console.log(init);

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