Jquery string format issue with {0}

Question

This not works and I can't figure it out why...

alert("milan {0}".format("djukic"));

My jquery version is 1.6.2. I tried everything and no success..

This is not related to jQuery, you are calling an undefined method. What is `format`? — Ram, Dec 22 '13 at 13:18
there is no predefined method called `.format()` in jQuery. I guess are you using any external plugins or have you written any method? — Praveen, Dec 22 '13 at 13:20
Now i see that format is not standard function.. Is there any like this or must write one? i want some method for string formating — milandjukic88, Dec 22 '13 at 13:21
Check this http://stackoverflow.com/questions/610406/javascript-equivalent-to-printf-string-format — Ram, Dec 22 '13 at 13:24

score 13 · Accepted Answer · edited May 23 '17 at 12:17

13

This isn't an error related to jQuery - it's the fact that you're trying to run a string instance's method that doesn't exist. A quick search gives me another StackOverflow answer, which happily implements String#format for you.

String.prototype.format = function() {
  var str = this;
  for (var i = 0; i < arguments.length; i++) {       
    var reg = new RegExp("\\{" + i + "\\}", "gm");             
    str = str.replace(reg, arguments[i]);
  }
  return str;
}

Just paste that at the top or near to the top of your script file and use your newly-created function like "the {0} jumps over the {1}".format("quick brown fox", "lazy dog"); in the script.

edited May 23 '17 at 12:17

Community

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answered Dec 22 '13 at 13:27

boxmein

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There's a small error there. The related answer implements `String.format`, that is, as a static method which takes a string as the first argument. To implement `String.prototype.format` you'd have to replace `arguments[0]` with `this`. – Fabrício Matté Dec 22 '13 at 13:36
1

Uhm I believe you can't reassign a value to `this` that way, better keep the `var s = this;` I think. `:P` – Fabrício Matté Dec 22 '13 at 16:56
I did that too. Thanks again! – boxmein Dec 22 '13 at 18:12
Thank you! Very nice function! – milandjukic88 Dec 27 '13 at 12:14

Jquery string format issue with {0}

1 Answers1