A simple function(or can be used as method) that makes texts lowerCamelCased. Separated by any non-alphabetic characters.
-
-
Save tsaniel/1094627 to your computer and use it in GitHub Desktop.
toCamelCase
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| function f( | |
| a, // the text, omitted if used as method | |
| b, // placeholder for replace for the first letter of a word | |
| c // placeholder for replace for the position | |
| ){ | |
| return | |
| ++c ? | |
| b.toUpperCase() | |
| : | |
| ( | |
| a | |
| || | |
| this | |
| ).toLowerCase() | |
| .replace(/[^a-z]+(.?)/g,f) | |
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| function f(a,b,c){return++c?b.toUpperCase():(a||this).toLowerCase().replace(/[^a-z]+(.?)/g,f)} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE | |
| Version 2, December 2004 | |
| Copyright (C) 2011 YOUR_NAME_HERE <YOUR_URL_HERE> | |
| Everyone is permitted to copy and distribute verbatim or modified | |
| copies of this license document, and changing it is allowed as long | |
| as the name is changed. | |
| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE | |
| TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION | |
| 0. You just DO WHAT THE FUCK YOU WANT TO. |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| { | |
| "name": "toCamelCase", | |
| "description": "Make texts lowerCamelCased", | |
| "keywords": [ | |
| "CamelCase", | |
| "toCamelCase" | |
| ] | |
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <title>toCamelCase</title> | |
| <div>Expected value: <b>thisIsJustAnExample</b></div> | |
| <div>Actual value: <b id="ret"></b></div> | |
| <script> | |
| var myFunction = function f(a,b,c){return++c?b.toUpperCase():(a||this).toLowerCase().replace(/[^a-z]+(.?)/g,f)} | |
| document.getElementById( "ret" ).innerHTML = myFunction('this-is0just\nan!@#$%example') | |
| </script> |
Thanks @subzey! Changed.
Thanks again @subzey, the second tip is really awesome!
@tsaniel, not at all!
Another note: function works unexpectedly if argument is an empty string
I have tried to fix, thanks!
you can shave another byte by using "top" instead of "this"...
The this here is actually this.
For example,
String.prototype.toCamelCase = function f(a,b){return b?b.toUpperCase():(a||this).toLowerCase().replace(/[^a-z]+([a-z])/g,f)}
'this-is0just\nan!@#$%example'.toCamelCase();
If you are going to go prototypical on me, I'll pass. ;-)
I tried to create a version that works without this (introduced some problems for me) and without a function name f in the global scope. (Update: It's not in the global scope but I simply don't like this.) It also strips non-letters from the end of the string (your version does not). It's 97 bytes, a little bit bigger than your attempt. If you don't care about the "non-letters at the end of string" case you can remove the ?.
function(a){return a.toLowerCase().replace(/[^a-z]+(.?)/g,function(a,b){return b.toUpperCase()})}
@maettig nice try!
But the f doesn't leak to the global scope, see Named function expressions.
@tsaniel, you can save 4 bytes by replacing [^a-z]+([a-z]) with [^a-z]+(.). (Note: This changes the behavior for some strings, e.g. "x12" becomes "x2".) But you can not use [^a-z]+(.?) to strip non-letters from the end of the string as in my approach without introducing some kind of typeof, e.g. ''+b===b. And this will make your version 1 byte longer than mine. ;-)
@maettig: wouldn't that fail on spaces?
@atk, no, why? ' aa bb ' becomes 'AaBb' in my version (but 'AaBb ' in @tsaniel's current one). ''+b===b is mentioned in the Byte-saving Techniques wiki. It returns true if b is a string, no matter what's in the string.
@maettig I've reflected the change, thanks!
By the way, we can use a variable c and the trick ++c rather than ''+b===b.
Another cool trick. By the way, I still don't understand why the this is in the code?
It's for the prototyping use.
See https://gist.github.com/1094627#gistcomment-56234.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
toCamelCase("a b c")returns"aBundefinedCundefined"It can be fixed (and shortened) by replacing
/([a-z])([a-z]+)?/gwith/([a-z])([a-z]*)/g.Another byte may be shaved by rearranging the
returnstatement:function(a){return(a||this).toLowerCase(a="").replace(/([a-z])([a-z]*)/g,function(b,c,d){a+=a?c.toUpperCase()+d:b}),a}