Question

我正在自学代码，并试图解决这个问题：

写一个循环遍历nums的循环，如果该项为偶数，则将其添加到evens数组，如果该项为奇数，则将其添加到odds数组。

这是我到目前为止所做的：

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

var evenNumbers = function(nums) {
    for (var i = 0; i < nums.length; i++) {

        if ((nums[i] % 2) != 1) {
            evens.push(nums[i]);
                console.log(evens);
        }
        else {
            odds.push(nums[i]);
                console.log(odds);
        }
    }

};

alert(evens);
alert(odds);

他们没有退货，我不知道我哪里出错了，任何帮助都会非常感激。

Answer 1

我建议使用ES6语法检查array.prototype.filter函数：

const oddNumbers = [1,2,34,54,55,34,32,11,19,17,54,66,13].filter((number) => number%2!==0);
console.log(oddNumbers);

如此优雅：）

Answer 2

您实际上并未执行此功能。你需要调用evenNumbers（）;

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

var evenNumbers = function(nums) {
    for (var i = 0; i < nums.length; i++) {

        if ((nums[i] % 2) != 1) {
            evens.push(nums[i]);
                console.log(evens);
        }
        else {
            odds.push(nums[i]);
                console.log(odds);
        }
    }

};

evenNumbers(nums);
alert(evens);
alert(odds);

Answer 3

你实际上并没有调用你的函数，只是定义它。

呼叫：

evenNumbers(nums);

警告数组之前

Answer 4

function groupNumbers(arr) {

  var arr = [1,2,3,4,5,6,7,8,9,10];

  var evenNumbers = arr.filter(number => number % 2 == 0);

  console.log("Even numbers " + evenNumbers);

  var oddNumbers = arr.filter(number => number % 2 !== 0);

  console.log("Odd numbers " + oddNumbers);
}

groupNumbers();

Answer 5

var rsl = {even:[], odd:[]};

[1,2,34,54,55,34,32,11,19,17,54,66,13].forEach(function(val,key,arr)
{
    var wrd = (val % 2) ? 'odd' : 'even';
    rsl[wrd][rsl[wrd].length] = val;
});

console.log(rsl);

Answer 6

            //Even odd
            var arrays = [1,2,34,54,55,34,32,11,19,17,54,66,13];
            var result = arrays.filter((numbers)=>{
                 if(numbers%2!==0){
                   console.log(`${numbers} is not even`);
                 } else {
                     console.log(`${numbers} is even`);
                }
            });

循环数组，返回奇数和偶数

6 个答案: