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string.format function code in js_javascript skills

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Release： 2016-05-16 18:04:41

Original

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Originated from string.Format() in C#

Copy code The code is as follows:

 
String. prototype.format = function(args) { 
if (arguments.length>0) { 
var result = this; 
if (arguments.length == 1 && typeof (args) == "object" ) { 
for (var key in args) { 
var reg=new RegExp ("({" key "})","g"); 
result = result.replace(reg, args[ key]); 
} 
} 
else { 
for (var i = 0; i < arguments.length; i ) { 
if(arguments[i]==undefined) 
{ 
return ""; 
} 
else 
{ 
var reg=new RegExp ("({[" i "]})","g"); 
result = result.replace(reg, arguments[i]); 
} 
} 
} 
return result; 
} 
else { 
return this; 
} 
} 

Example:

Copy code The code is as follows:

 
//Two calling methods 
var template1="I am {0}, and I am {1} this year"; 
var template2="I am {name}, and I am {age} this year. "; 
var result1=template1.format("loogn",22); 
var result2=template1.format({name:"loogn",age:22}); 
//Two results They are all "I am loogn, I am 22 this year" 

Related labels：

format string

source：php.cn

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