It looks like it’s decompiled from something, so all the variable names are missing and instead presented with whatever index they had in the binary.

But that’s just a wild guess. I don’t know what actual decompiled code looks like.

Edit: scratch that, it’s just obfuscated code to make it harder to copy.

https://stackoverflow.com/questions/11932567/found-this-nasty-code-i-wonder-what-it-does-should-i-be-worried#11932708