FAQ Database Discussion Community


Are Parse Counters Multi-threaded?

ios,multithreading,parse.com,increment,decrement
I am creating an app that will increment/decrement a value by 1 or 2 based on responses from users. If multiple users try to change the value at the same time, will it work correctly? My example code is: PFObject *gameScore = [PFObject objectWithClassName:@"GameScore"]; [gameScore setObject:[NSNumber numberWithInt:1337] forKey:@"score"]; [gameScore saveInBackground];...

What are the historical reasons C languages have pre-increments and post-increments?

c++,c,post-increment,decrement,pre-increment
(Note: I am not asking about the definitions of pre-increment vs. post-increment, or how they are used in C/C++. Therefore, I do not think this is a duplicate question.) Developers of C (Dennis Ritchie et al) created increment and decrement operators for very good reasons. What I don't understand is...

Javascript For Loop with Iterator In the Middle and Decrement Operator to the Left of i?

javascript,for-loop,syntax,decrement
For a non-recursive example of a factorial function I found this example and am having a little difficulty tracing through the code: function fact(x) { if(x == 0) { return 1; } if(x < 0 ) { return undefined; } for(var i = x; --i; ) { x *= i;...