Turns indentation into {curly brackets} Great for a yml to json converter or something. Credit to @maettig for writing all* the code.
Turn this:
if(3==3)
alert("obviously!")
alert("lol!")
Into:
if(3==3){
alert("obviously!")
alert("lol!")
}
jsperf showing the different methods:
http://jsperf.com/blockifyindents
*almost
| function(a,b,c){ | |
| for( | |
| b=1; //loop starts at 1 | |
| (c=RegExp('(\n\t{'+b+++'}).*(\\1.*)*','g')) //for every indent level (b) | |
| .test(a=a.replace(c,'{$&}')); //put curly braces around blocks | |
| ); //if regex test returns false, end loop | |
| return a //return the blockified string | |
| } |
| function(a,b,c){for(b=1;(c=RegExp('(\n\t{'+b+++'}).*(\\1.*)*','g')).test(a=a.replace(c,'{$&}')););return a} | |
| //shorter version (Only if indents are smaller than 9!!!) | |
| function(a,b){for(b=9;--b;)a=a.replace(RegExp('(\n\t{'+b+'}).*(\\1.*)*','g'),'{$&}');return a} |
| { | |
| "name": "blockifyIndents", | |
| "description": "Turns indentation into {curly brackets}.", | |
| "keywords": [ | |
| "indentation", | |
| "tabs", | |
| "block", | |
| "whitespace", | |
| "yml" | |
| ] | |
| } |
| <!DOCTYPE html> | |
| <title>Foo</title> | |
| <div id = code> | |
| if(3==3) | |
| alert("obviously!") | |
| alert("lol!") | |
| </div> | |
| <script> | |
| blockifyIndents = function(a,b,c){for(b=1;(c=RegExp('(\n\t{'+b+++'}).*(\\1.*)*','g')).test(a=a.replace(c,'{$&}')););return a} | |
| document.write(blockifyIndents(document.getElementById("code").innerHTML)) | |
| </script> |
@maettig
=D smart bit of code there!
Thanks!
Here is an other idea I had. I'm not sure if it works in all cases. Maybe we need to replace the first .* with [^\t]*. Do you have more test cases?
function(a,b){for(b=9;--b;)a=a.replace(RegExp('(\n\t{'+b+'}).*(\\1.*)*','g'),'{$&}');return a}
@maettig
Holy shit that's genius!
But it only works up to a certain indent level...
Aside from that it seems to work with all the tests I did! :D
You can either replace 9 with 99 (which is very slow, see this jsPerf test case) or use something like the following to make it work with all indention levels.
function(a,b,c){for(b=1;(c=RegExp('(\n\t{'+b+++'}).*(\\1.*)*','g')).test(a);)a=a.replace(c,'{$&}');return a}
@maettig
Sweet! I'll test it a bit and I'll probably make it the official version.
I also added safari and chrome to the jsperf.
@maettig
Congratulations! Your version (edited to remove 1 byte) is now the official function!
Thanks a bunch!
This is a funny hack. You are executing test() and replace() in reverse order. But it works. It's even faster. I wonder why.
You can save a few bytes. Also your version leaked the variable e to the global scope. You may find my dumpGlobalLeaks helpful.