Question

我想知道如何实现这种情况：我有2个字符串数组，比如说：

var cars = ["Saab", "Volvo", "BMW", "Mercedes", "Fiat"];

第二个是：

var colour = ["red", "blue", "green"];

我想制作一个循环，例如7个交互循环从两个数组中选择7对，如下所示：

   1st iteration "Saab" "red", 
   2nd iteration "Volvo" "blue", 
   3th iteration "BMW" "green", 
   4th iteration "Mercedes" "red", 
   5th iteration "Fiat" "blue", 
   6th iteration "Saab" "green", 
   7th iterathion "Volvo" "red"

因此它将第一个数组与第二个数组匹配，如果数组没有值则从头开始。

Answer 1

使用Array#map对cars进行迭代，并使用索引（i）上的% operator (remainder)来获得匹配的颜色：

var cars = ["Saab", "Volvo", "BMW", "Mercedes", "Fiat"];
var colour = ["red", "blue", "green"];

var result = cars.map(function(car, i) {
  return [car, colour[i % colour.length]]; // convert to whatever result you need
});

console.log(result);

Answer 2

你可以计算并利用remainder operator %的优势和实际数组的长度。

＆＃13;

.as-console-wrapper { max-height: 100% !important; top: 0; }

＆＃13;

Error: No matching signature for function IF for argument types: BOOL, STRUCT. 
Supported signature: IF(BOOL, ANY, ANY) at [12:11]

＆＃13;

将两个数组配对，长度不同

2 个答案: