What does | and << mean?

Question

Sorry if this is a common question but I don\'t know what it\'s called so I\'m having trouble searching for it.

How does this work:

view.autoresizing         


        

Answer 1

"|" is a bitwise 'or'.

"<<" is also a bitwise operation shifting. it moves all the bits to the left:

00100 << 1 = 01000

Read the wiki, you're interested in "or" and shift operations.

Answer 2

These are C bit level operators.

| is binary or: 0001 | 0010 = 0011.

<< is a bit shift: 0001 << 1 = 0010.

They are used for bitmasks.