Whats the difference?

[Ghost_Fang]

I have used "&&" many times which means "and" right?
I have used "||" which is "or" correct?
I have recently came across " | " which looks to me like it means "and" as well.
So what is the difference between "&&" and "|"?

[GiffE]

I have used "&&" many times which means "and" right?
I have used "||" which is "or" correct?
I have recently came across " | " which looks to me like it means "and" as well.
So what is the difference between "&&" and "|"?

Incorrect, | and & are bitwise operators meaning & is "bitwise and" and | is "bitwise or". You may have to understand a bit of binary to fully understand them. In quakec they are most commonly used with flags as flags are powers of 2.

http://en.wikipedia.org/wiki/Bitwise_operation

[r00k]

kinda like

if (self.var & (A|BlC)) to determine if var is any combination of ABC

u can also do

self.var = self.var - (self.var & blah);
or
self.var = (self.var|blah); which turns blah bit ON in .var

a bit of binary

Lol! no pun intended i'm sure

[dreadlorde]

Let's say that the variable `x` has a value of 13, and `y` a value of 32. In
binary, 13 is represented as `11001`. To understand this, I've made this table:

Code: Select all

128 64 32 16 8 4 2 1
0   0  0  0  1 1 0 1


As you can infer from this, `y` would be written as `100000`. With a bitwise or,
the result is 1 if the first bit is 1 or the second bit is 1, otherwise the result is 0.[1]

Code: Select all

 00001101
|00100000
---------
 00101101


Which equals 45.

With a bitwise and, the result is 1 if the first bit and the second bit are 1, and 0 otherwise.[1]

Code: Select all

 00001101
&00100000
---------
 00000000


Hope that helps.

[1]http://en.wikipedia.org/wiki/Bitwise_operation

[Ghost_Fang]

Yea, Baker explained a bit of binary before to me somewhere. And for once.... I completely understand! lol.

Thanks guys, I know a bit more now