How to loop an array in vue.js

Vue.js method to implement loop array: 1. Use for traversal, the code is [for(var i in array):console.log(array[i], i)]; 2. Use forEach method , traverse the array from beginning to end, calling the specified function for each element.

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vue.js implements loops Array methods:

1. Vue traversal array methods:

var array = [1, 2, 3, 4]
//方法一：
for( var i in array):
    console.log(array[i], i)
 
//方法二：
array.forEach((v, i) => {
    console.log(v, i)
})

for loop and forEach are equivalent, both loop arrays.

2. The forEach() method traverses the array from beginning to end and calls the specified function for each element.

var a = [1,2,3,4,5];     
var sum = 0;             
a.forEach(function (value) {
    sum += value
})             
console.log(sum); //sum = 15

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