12 Practical Javascript tricks for kinky sex

Here are 12 useful Javascript tricks to share . 16 years after JavaScript was born in 1995, countless web pages around the world rely on her for mission-critical tasks, andJavaScript has ranked 8th in the list of programming languages published by Tiobe, followed by C #, JavaScript has shifted from a previously decorative scripting language to a mainstream programming language that people use to develop larger and more complex programs.

1. Turn the rounding into a numerical type:

' 10.567890 ' |

Results: 10

' 10.567890 ' ^0

Results: 10

-2.23456789|0

Results: 2

~~-2.23456789

Results: 2

2. Date to Value:

var d = +new Date (); 1295698416792

3. Class Array Object goto array:

var arr = [].slice.call (arguments)

4. Beautiful Random Code:

Math.random (). toString (+). substring (2); 14-bit Math.random (). toString (+). substring (2); 11 Guests

5. Merging arrays:

var a = [1,2,3];var B = [4,5,6]; Array.prototype.push.apply (A, b); Uneval (a); [1,2,3,4,5,6]

6. Use 0 full-complement digits:

function Prefixinteger (num, length) {  return (Num/math.pow (ten, length)). toFixed (length). substr (2);

7. Exchange Value:

a= [B, b=a][0];

8. Insert an array into another array at the specified location:

var a = [1,2,3,7,8,9];var b = [4,5,6];var Insertindex = 3;a.splice.apply (A, Array.concat (Insertindex, 0, b));//a:1,2,3,4 , 5,6,7,8,9

9. Delete the array element:

var a = [1,2,3,4,5];a.splice (3,1);

10. Quickly take the maximum and minimum values of the array

Math.max.apply (math, [])//3math.min.apply (math, [])//1

11. Condition Judgment:

var a = b && 1;

Equivalent

if (b) {  a = 1}

var a = B | | 1;

Equivalent

if (b) {  a = b;} else {  a = 1;}

12. Determine IE:

var ie =/* @cc_on [email protected]*/false;

12 Practical Javascript tricks for kinky sex