[NOOB QUESTION] how can i edit a function to return 1 in IDA pro?

[sendersu]

IDA is not very suitable for binary editing/patching
I'm using for this purpose old good (I think best) hex editor - Hiew

for example, I have a simple routine: http://prntscr.com/1qdbek0
I want to patch it so it 'll return 1

I'm navigating to required address, pressing F3, then F2
and typing (wow) asm commands
like
xor eax, eax
inc eax
retn

here we go: http://prntscr.com/1qdbfu3