Use of Javascript methods

(1): Add an element to the array: var array = [];

    VaR
Array = [];
  Array. Push (123 );
  Array. Push (456 );
  Array. Push (false );
  Array. Push ("M ");
  Array. Push ("");
  Array. Push ("S ");
  
  For (VAR item in array ){
   Alert (typeof
Array [item]);
  }

(2) Pop pops up the elements in the array.

VaR array = [];
  Array. Push (123 );
  Array. Push (456 );
  Array. Push (false );
  Array. Push ("M ");
  Array. Push ("");
  Array. Push ("S ");
  VaR Len = array. length;
 
  For (VAR
I = 0; I <Len; I ++ ){
   Alert (array. Pop ());

  }
  Alert ("length of the last array:" + array. Length );

(3) join

VaR array = [];
  Array. Push (123 );
  Array. Push (456 );
  Array. Push (false );
  Array. Push ("M ");
  Array. Push ("");
  Array. Push ("S ");
  VaR str1 = array. Join (",");
  VaR str2 = array. Join ("| ");
  Alert (str1 );
  Alert (str2 );

The printed result is:

123,456, false, M, A, S
Concatenates an array into a string.
123 | 456 | false | M | A | S
Use | to cut the array into a string...

(4) Contact 
Combine the arrays another and another2 into an array (all the elements of the three arrays are available)

 VaR Bigarray=Array. Concat (another,Another2 ); 

(5)

Alert (bigarray. Slice (5, 9 ));Returns the starting position of the first parameter to the ending position of the second parameter. The array itself is not affected.

(6) splice Method

 

1.
Bigarray. splice (5,2 );     

2:Bigarray. splice (5,0,"","B ","B ","D "); 

 

The first line of code indicates that two elements are deleted from the bigarray array and the second line of code indicates that 0 elements are deleted from the first element, insert all subsequent parameters to the starting position from 5th.