Linkers and Loaders for Objective-C -

i came across john levine's book "linkers , loaders." book written in year 2000. if has read book, author says still relevant objective-c in year 2013? asking, because looks book have on shelf, if info out of date don't want study book.

thanks!

yes & no...

i don't know specific book, if up-to-date in 2000 material in should still valid learn how things work under hood.

however, not need know linking , loading understand variables , pointers.

nor need understand symbol tables such. symbol table data structure used compilers track variables during compilation part of translating program code write instructions cpu understands.

the concepts of variables , pointers in programming languages abstractions of concepts of memory locations , memory addresses @ cpu level (which in sense abstractions of lower-level stuff, ending circuits and, if dig deep enough, electrons! ;-))

what should looking book on programming language concepts rather compiling, linking , loading. book introduce variables , types, composites such arrays , records, , end objects (which variables you'll discover). types , variables go together, 1 says how interpret collection of bits other provides somewhere keep collections of bits. pointer value (collection of bits) of pointer type, integer value of integer type.

variables , pointers not difficult concepts, misunderstood - plenty of questions on stem misunderstandings of these concepts - quest good, go , read! apologies, i've no reference hand.