Convert a string to a decimal base using JavaScript

JS is a very magical language, the internal system of many functions can help us to carry out number (base) conversion;

JS can directly use hexadecimal;
Var a = 0 XFF. / / 255

Convert any hexadecimal string to decimal, such as binary, octal, hexadecimal, the second number is not written is the most commonly used conversion to integer decimal;

parseInt("11", 2); //3, 2 to 10 

parseInt("77", 8); //Hexadecimal to hexadecimal 

parseInt("af", 16); //175 hexadecimal to hexadecimal 

Converts hexadecimal to binary, octal, and hexadecimal strings
Object. ToString (n) : can (n) represent the base, such as

(152).toString(2) //"10011000"; Convert 152 into an object using parentheses, or write it as follows. < br / >
152..toString(2) //Here the first point converts 152 to a decimal of the float type, and the second point is the eject object method; < br / >
152..toString(16) //"98" : decimal to hexadecimal 

152..toString(32) //"4o" : decimal to 32 

If necessary during the conversion process. You can use the following:

/** 

* @param num  It needs to be made up 16 For the digital  

* @param len  The number of digits to fill   Here is the  

* @returns  The completed string  

* */ 

function format(num, len) { 

var l = num.length; 

if (num.length < len) { 

for (var i = 0; i < len - l; i++) { 

num = "0" + num; 

} 

} 

return num; 

}