A brief analysis of the source code of Prototype Number part

There are fewer methods for Number, with a total of 8:

toColorPart: Convert Number object to hexadecimal form with two digits
succ: Returns the next value of the current Number object, that is, the current value is added by one
times: Encapsulate a standard [0...n] loop in Ruby style
toPaddedString: Convert the current Number object to a string. If the converted string length is less than the value specified by length, use 0 to fill the remaining number of bits on the left
abs: Returns the absolute value of the current Number object.
round: Returns the integer value after the current Number object is rounded.
ceil: Returns the minimum integer value greater than or equal to the current Number object.
floor: Returns the maximum integer value less than or equal to the current Number object.

One of the important methods is toPaddedString. The Number object overrides the toString method:
(radix)

parameter	describe
radix	Optional. Specify the cardinality of the number, making an integer between 2 and 36. If this parameter is omitted, the cardinality 10 is used. But be aware that if the parameter is a value other than 10, the ECMAScript standard allows implementations to return any value.

Copy the codeThe code is as follows:

 
function toPaddedString(length,radix){ 
var string = (radix || 10);//Convert the number to the corresponding division first
return '0'.times(length - ) + string;//The times method is extended in String, repeating a character n times
} 

With this method, there is a more useful extension, which is toColorPart, which can be used for color conversion in CSS:

Copy the codeThe code is as follows:

 
function toColorPart() { 
return (2, 16); 
} 

Since it is a CSS color conversion, the number must be within the range [0-255].

((10).toColorPart());//0a
There is a method succ with the same name as in String, and its function is similar. The String is added in a character table, and the Number is in the order of natural numbers.

Copy the codeThe code is as follows:

 
function succ() { 
return this + 1; 
} 

((10).succ());//11
Starting from this method, come up with a simple 0-n array

Copy the codeThe code is as follows:

 
function range(){ 
var ret = [0]; 
for(var i = 0; i < this - 1; i++){ 
(()); 
} 
return ret; 
} 

((10).range());//[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
Temporarily use this range function to get the times function:

Copy the codeThe code is as follows:

 
function times(iterator, context){ 
().forEach(iterator, context);//The R() method is used in the source code
return this; 
} 

Copy the codeThe code is as follows:

 
var s = ''; 
(5).times(function(item){ 
s += item; 
}); 
(s);//01234 

Apart from the above methods, the other method is to extend the static method of Math to the Number object [the statement is inaccurate, meaning... =. =】

Copy the codeThe code is as follows:

 
function abs() { 
return (this); 
} 
function round() { 
return (this); 
} 
function ceil() { 
return (this); 
} 
function floor() { 
return (this); 
} 