June 2011
1 post
2 tags
Parsing Mathematical Expressions
A while ago, I was looking for a library to parse NSString objects as mathematical expressions. I wanted to be able to take a string like @"2+3*4" and get back 14. I found two easy ways to do this: GCMathParser and NSPredicate (of course!).
GCMathParser is a library by Graham Cox for parsing strings as equations. It uses a parser generated by BISON as the primary engine, with a...
