JavaScript simulation implements C# String.format function function code_javascript skills

The C# string.format function is used in many places, so I implemented a simple version using js:

Copy code The code is as follows:

String.format = function ()
                                                                    🎜> var formatStr = arguments[0];
if ( typeof formatStr === 'string' )

{
var pattern,
length = arguments.length;

for ( var i = 1; i < length; i )

{
pattern = new RegExp( '\{' ( i - 1 ) '\}', 'g' );
                formatStr = formatStr.replace(pattern, arguments[i]);
                                         '';
}

           return formatStr;
       };

The above code adds a static method format to the javascript String class, and its usage is exactly the same as c#'s string.format. The test is as follows:

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The code is as follows:String.format('http://wcf.open .a.com/blog/sitehome/paged/{0}/{1}',1,20)Output: "http://wcf.open.a.com/blog/sitehome/paged/1/ 20"

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The code is as follows:String.format('{0} {0} { 1}={2}',1,2,1 1 2)Output: "1 1 2=4"

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The code is as follows:String.format({name:'leonwang'}, 'hello,world')Output: ""

If the first parameter is not of string type, simply return an empty string without further processing.