Insert one string into another.

[jlizarraga]

Hello everyone. Today I'm looking for a way to insert one string within a certain point in another, to make redirects between spanish and english pages dynamic.

Let's pretend I have the following two variables:

var string = "http://www.example.com/hello.html"; // This would come from document.location

var insert = "/newdir/"

How would I go about taking these two strings and creating the string "http://www.example.com/newdir/hello.html"?

Thanks a bunch!

[mburt]

Well, if you're looking for that file in specific:

var string = "http://www.example.com/hello.html"; // This would come from document.location
var insert = "newdir"
string = string.replace("/hello.html", new RegExp(insert))+"hello.html";

[Twey]

var Lang = {
  interpolate: function(str, vars) {
    str = str.replace(/%%/g, '\0');
    for (var x in vars)
      str = str.replace(new RegExp('%' + x + '%', 'g'), vars[x]);
    return str.replace(/\0/g, '%');
  }
};

Usage:

Lang.interpolate("http://www.example.com/%LANG%/hello.html", {
    'LANG' : 'es'
  });

[mburt]

I'm seriously starting to believe you have some kind of condition. Haha.

[Twey]

Hmm? Because I respond to posts with (simple, in this case) code?

[mburt]

You might find 5 people on this entire forum who think that code is simple. Me = 15 year old. You = Intelligent person.

[Twey]

It's four lines of actual code, and a few lines of namespacing Also, I'm only three years older than you.

[mburt]

Wow, really? Cool. You seem older.

[jlizarraga]

Is there any chance you could explain what is going on here line by line? There's a lot of stuff in there I'm completely unfamiliar with.

[Twey]

var Lang = {                                                        // create a variable named 'Lang' and to it assign a new object.
  interpolate: function(str, vars) {                                // create a function of two arguments and assign it to a property 'interpolate' within that object.
    str = str.replace(/\\%/g, '\0');                                 // replace all instances of '\%' with a \0 null placeholder character
    for (var x in vars)                                             // for every key in 'vars' as 'x'
      if (vars.hasOwnProperty(x))
        str = str.replace(new RegExp('%' + x + '%', 'g'), vars[x]); // replace %x% with the value of that var in the 'vars' object
    return str.replace(/\0/g, '%');                                 // swap the placeholder out for a single % and return
  }                                                                 // end function
};                                                                  // end object and statement

http://developer.mozilla.org/en/docs...t_Initializers
http://developer.mozilla.org/en/docs...ction_Operator
http://developer.mozilla.org/en/docs...String:replace
http://developer.mozilla.org/en/docs...ments:for...in
http://developer.mozilla.org/en/docs...hasOwnProperty
http://developer.mozilla.org/en/docs...nctions:RegExp