javascript for 循环函数合并两个新数组。

Question

作为学习练习的一部分，我正在尝试创建一个带有 For 循环的函数。该函数返回一个新的数组变量，合并并匹配数组 musicians 和 instruments 的索引值。所以预期的返回应该是字符串:“约翰·列侬弹吉他”

这是我的尝试，但我一直未能获得返回:

var musicians = ["John Lennon", "Paul McCartney", "George Harrison", "Ringo Starr"]
var instruments = ["Guitar", "Bass Guitar", "Lead Guitar", "Drums"]

  function theBeatlesPlay(musicians, instruments) {      

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

      var newMusicians = musicians[i]
      var newInstruments = instruments[i]
    }

    console.log(newMusicians[i] + "plays" + instruments[i])
  }

Answer 1

您将在循环的每次迭代中覆盖变量。您需要创建一个空数组并填充它(然后返回它):

var musicians = ["John Lennon", "Paul McCartney", "George Harrison", "Ringo Starr"]
var instruments = ["Guitar", "Bass Guitar", "Lead Guitar", "Drums"]

function theBeatlesPlay(musicians, instruments) {
  var combinations = [];

  for (let i = 0; i < musicians.length; i++) {
    combinations.push(musicians[i] + ' plays ' + instruments[i]);
  }

  return combinations;
}

console.log(theBeatlesPlay(musicians, instruments));