如何使偶数数组先打印而不是赔率？ [英] How to get even numbers array to print first instead of odds?

问题描述

所以我有此功能，需要取出偶数和几率并将它们放入单独的数组中，但我需要先打印偶数而不是几率。

So I have this function where I've need to take out the evens and odds and put them into separate arrays but I need the evens array to print first rather than the odds.

var numbersArray = [1,2,34,54,55,34,32,11,19,17,54,66,13];

function divider(numbersArray) {
  var evensOdds = [[], []];
    for (var i = 0; i < numbersArray.length; i++) {
      evensOdds[i & 1].push(numbersArray[i]);
  }
  return evensOdds;
}

推荐答案

如果要拆分而不是使用索引（ i ），而是使用值- numbersArray [i ]％2 。

If you want to split the number by their even and odd values, instead of using the index (i), determine the sub array to push into using the value - numbersArray[i] % 2.

var numbersArray = [1,2,34,54,55,34,32,11,19,17,54,66,13];

function divider(numbersArray) {
  var evensOdds = [[], []];
  for (var i = 0; i < numbersArray.length; i++) {
    evensOdds[numbersArray[i] % 2].push(numbersArray[i]);
  }
  return evensOdds;
}

console.log(divider(numbersArray));

如果要按偶数和奇数索引对它们进行拆分，请使用（i + 1）％2 确定要推入的子数组：

If you want to split them by even and odd indexes use (i + 1) % 2 to determine the sub array to push into:

var numbersArray = [1,2,34,54,55,34,32,11,19,17,54,66,13];

function divider(numbersArray) {
  var evensOdds = [[], []];
  for (var i = 0; i < numbersArray.length; i++) {
    evensOdds[(i + 1) % 2].push(numbersArray[i]);
  }
  return evensOdds;
}

console.log(divider(numbersArray));

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