Array functions of JavaScript

(1) Join function: Converts and joins all elements in an array to a string. Cases:

　　　　

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1. function Joindemo ()
2. {
3. var a, b;
4. A = NewArray (0,1,2,3,4);
5. b =a.join ("-"); //Delimiter
6. return (b); //Return to b== "0-1-2-3-4"
7. }

(2) Length function: Returns the lengths of the array. Cases:

　　　

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1. function Lengthdemo ()
2. {
3. var a, l;
4. A = NewArray (0,1,2,3,4);
5. L = a.length;
6. return (L); //l==5
7. }

(3) Reverse function: Reverses the order of the array elements. Cases:

　　　

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1. function Reversedemo ()
2. {
3. var a, l;
4. A = new Array (0,1,2,3,4);
5. L = A.reverse ();
6. return (L);
7. }

(4) sort Function: Reorder the elements of the array. Cases:

　　　　

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1. function Sortdemo ()
2. {
3. var a, l;
4. A = NewArray ("X","y","D", "Z","V","M","R");
5. L = A.sort ();
6. return (L);
7. }

(5) toString Function: Converts an array into a string, concatenated by commas.

(6) valueOf function: The same as the ToString function.

(7) concat function: Connect the other array to the end of the current array.

(8) shift Function: Deletes the first element in the array and returns the value of the deleted element.

(9) pop function: Deletes the last element.

(10) Push function: Adds one or more elements to the tail end and returns the length of the array after the addition.

(11) unshift function: Add one or more elements to the first end

(12) Slice (start,end) function: intercepts a segment element of an array, starting at the end of the array if start is a negative number

Array functions of JavaScript