JavaScript deletes elements in an array/object

One, array:

1. Code:

   /*@desc：删除数组中的元素@param arr 原数组@param item 数组索引，只能是数字索引@param len 要删除的长度@return arr 删除元素后的数组*/function unset(arr,item,len = 1){arr.splice(item,len)return arr}

2. Test:

   var arr = new Array(1,2,3,4)var ret = unset(arr,1,2)console.log(ret)

3. Output:

   [ 1, 4 ]

   Two, JSON object:
4. Code:

   /*@desc：删除对象中的元素@param arr 原对象@param item 对象索引@return arr 删除元素后的对象*/function unsetobj(obj,item){delete obj[item]return obj}

5. Test:

   var obj = {name:‘lee‘,sex:‘male‘}var ret = unsetobj(obj,‘sex‘)console.log(ret)

6. Output:

   { name: ‘lee‘ }

JavaScript deletes elements in an array/object