JavaScript中数组经常使用方法整理

1.Array.splice(开始位置，删除的个数，元素) ——能够实现增删改 let arr=[1,2,3,4,5]; let arr1 = arr.splice(2,0,'haha'); let arr2 = arr.splice(2,3); let arr3 = arr.splice(2,1,'haha'); console.log(arr1); //[1,2,'haha',3,4,5]

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