Method for Array operations: concat() and sort():

 

concat() : Joins two arrays and returns a new array.

Sort() :Sorts the elements of an array.

<script language="javascript">

Arr1=new Array(2,1,4,3) ;

Arr2=new Array(6,8,9,7) ;

document.write("<h2>First Array Arr1</h2>");

for(i=0;i<Arr1.length;i++)

document.write(Arr1[i]+"<br/>");

document.write("<h2>First Array Arr2</h2>");

for(i=0;i<Arr2.length;i++)

document.write(Arr2[i]+"<br/>");

Arr3=Arr1.concat(Arr2); //user for concat two array

document.write("<h2>First Array Arr1 after concat</h2>");

for(i=0;i<Arr3.length;i++)

document.write(Arr3[i]+"<br/>");

Arr3.sort();//user for sorting

document.write("<h2>First Array Arr1 after sort()</h2>");

for(i=0;i<Arr3.length;i++)

document.write(Arr3[i]+"<br/>");

</script>

Join:

join()  The string conversions of all array elements are joined into one string.

<script language="javascript">

Arr1=new Array("RED","YELLOW","GREEN") ;

MYVAR=Arr1.join();

document.write(MYVAR);

</script>

push() and pop():

push() : Add  elements to the end of an array and returns the new length of the array. This method changes the length of the array.

pop():Removes the last element from an array.

<script language="javascript">

Arr1=new Array("RED","YELLOW","GREEN") ;

document.write("<h3>Elements of array before push()</h3>");

for(i=0;i<Arr1.length;i++)

{

document.write(Arr1[i]+"<br/>");

}

Arr1.push("BLUE","WHITE","BLACK");

document.write("<h3>Elements of array after push()</h3>");

for(i=0;i<Arr1.length;i++)

{

document.write(Arr1[i]+"<br/>");

}

document.write("<h3>Elements of array after pop() 3 times</h3>");

for(i=0;i<=2;i++)

{

Arr1.pop();

}

for(i=0;i<Arr1.length;i++)

{

document.write(Arr1[i]+"<br/>");

}

</script>

reverse(): the first array element becomes the last and the last becomes the first.

<script language="javascript">

Arr1=new Array("RED","YELLOW","GREEN","BLUE","WHITE","BLACK") ;

document.write("<h2>Element of Array Before reverse()</h2><br/>");

for(i=0;i<Arr1.length;i++)

{

document.write(Arr1[i]+"<br/>");

}

Arr1.reverse();

document.write("<h2>Element of Array After reverse()</h2><br/>");

for(i=0;i<Arr1.length;i++)

{

document.write(Arr1[i]+"<br/>");

}

</script>