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js implements moving up and down of data in an array
- 小云云Original
- 2018-01-19 13:07:301889browse
This article mainly brings you an example of js realizing moving up and down data in an array. The editor thinks it is quite good, so I will share it with you now and give it as a reference for everyone. Let’s follow the editor to take a look, I hope it can help everyone.
The example is as follows:
var swapItems = function(arr, index1, index2){
arr[index1] = arr.splice(index2,1,arr[index1])[0]
return arr
}
var arr = [1,2,3]
var newArr = []
upData (arr, index) {
if (this.arr.length > 1 && index !== 0) {
newArr = swapItems(arr, index, index - 1)
}
}
downData (arr, index) {
if (this.arr.length > 1 && index !== (this.arr.length - 1)) {
newArr = swapItems(this.arr, index, index + 1)
}
}
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