The js array deletes elements by subscript

1. Create an array

var array = new Array();

var array = new Array(size);// Specifies the length of the array 

var array = new Array(item1,item2 ... itemN);// Create the array and assign the value 

2. Value and assignment

var item = array[index];// Gets the value of the specified element 

array[index] = value;// Assigns a value to the specified element 

3. Add new elements

array.push(item1,item2 ... itemN);// will 1 Two or more elements are added to an array, returning the length of the new array 

array.unshift(item1,item2 ... itemN);// will 1 Four or more elements are added to the starting position of the array, and the original element position is automatically moved back and returned    The length of the new array 

array.splice(start,delCount,item1,item2 ... itemN);// from start The position begins to be deleted backward delCount And then from start The position begins to insert 1 Two or more new elements 

4. Delete elements

array.pop();// Delete the last 1 And returns that element 

array.shift();// Delete the first 1 The array element position is automatically moved forward to return the deleted element 

array.splice(start,delCount);// from start The position begins to be deleted backward delCount An element 

5. Combination and interception of arrays

array.slice(start,end);

// Returns an array as an array 1 Partial, not included  end  The corresponding element, if omitted  end  Will be copied  start  Everything after that 

array.concat(array1,array2);

// Splice multiple arrays together 1 An array 

6. Sorting arrays

array.reverse();// An array of reverse 

array.sort();// Array sort, return array address 

7. Array to string

array. join (separator); // concatenates array causes with separator

Column so all is not found to delete the array element method! Then looked up 1 some data to find the solution.
Deleting array elements requires extending the Array prototype prototype.

Array.prototype.del=function(index){
    if(isNaN(index)||index>=this.length){
      return false;
    }
    for(var i=0,n=0;i
      if(this[i]!=this[index]){
        this[n++]=this[i];
      }
    }
    this.length-=1;
  };