I am learning Javascript from CrockFord video "Crockford on javascript" and I am watching : "Function The Ultimate" In one of his code "he was talking about " pseudo parameters" " I saw something like this :
for( i = 0; i<n; i+=1) So why he is not using the increment operator "++" and he is using the "+=", i know they do the same but is there a performance difference ?
Thank you.
As the OP is talking about performance, I set up a JSPerf to see how the two compare. Go ahead and test this out for yourself:
++ but that's because I personally read code easier when using that. However, I also sometimes have cleaner one-line code when using ++ within another line of code. It can save the use of a bracket in this case, but that's about the only difference it will make.There's no measurable performance difference. You'd be hard pressed to write a test case in which you could measure any difference.
As Ronnie pointed out in his comment, the ++ operator increments by 1, but the += can add an amount other than 1.
++is plus 1 and+=can be plus X. In your instance they both do the same thing since you are adding by only 1. edit: should have read the end part of the question..I can't speak on performance difference, but I would imagine not muchi = i + 1==i += 1==i ++==++ i(although what each of those returns when used inside a larger expression is another matter)++for some reason: see stackoverflow.com/questions/971312/…