What is OR EQUAL

Question

dataUpdated |= [backgroundApplicationData downloadLinks];

What does this Or/Equal mean? Never seen it before.

Answer 1

It's bitwise OR, but condensed like +=.

It's equivalent to dataUpdated = dateUpdated | [backgroundApplicationData downloadLinks];

Here's a list of the bitwise operators: http://www.techotopia.com/index.php/Objective-C_Operators_and_Expressions#Compound_Bitwise_Operators