Brad Cox has died

Post by PaulDavisThe1st » Sat, Jan 23, 2021, 4:45 AM UTC

armadsen wrote: post #89

PaulDavisThe1st wrote: post #83

Earlier quoted context omitted.

I don't see how you can call ObjC any more of a superset of C than C++. Object-related syntax in ObjC is completely alien to C. Object-related syntax in C++ (mostly) extends C structure syntax. Yes, ObjC takes its cues from Smalltalk. C++ does not. And so... ? [EDIT: ok, so people want to interpret "superset" as meaning "every valid C program is a valid Objective C program too. This is, with very few exceptions, true…

Because ObjC is a strict superset of C in the technical sense. That is: every valid C program is also a valid Objective-C program. Of course idiomatic ObjC is heavily tilted toward the non-C parts of the language (OOP features), but that doesn’t mean it’s not a true superset of C.

Post by saagarjha » Sat, Jan 23, 2021, 4:52 AM UTC

PaulDavisThe1st wrote: post #100

saagarjha wrote: post #98

Earlier quoted context omitted.

Thankfully, in computer science terms like "array" and "string" still mean what they did many years ago.

It's not about "array" or string". [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(appDidBecomeActive:) name:NSApplicationDidBecomeActiveNotification object:[NSApplication sharedApplication]]; can you explain to me what any of those terms mean without looking a fairly extensive reference manual?

Post by grzm » Sat, Jan 23, 2021, 4:59 AM UTC

saagarjha wrote: post #105

PaulDavisThe1st wrote: post #102

Earlier quoted context omitted.

"Yes! C++ is nearly exactly a superset of Standard C95 (C90 and the 1995 Amendment 1). With very few exceptions, every valid C95 program is also a valid C++ program with the same meaning." https://isocpp.org/wiki/faq/c

Objective-C has no exceptions.

   @try {
        // do something that might throw an exception
    }
    @catch (NSException *exception) {
        // deal with the exception
    }
    @finally {
        // optional block of clean-up code
        // executed whether or not an exception occurred
    }

Post by nielsbot » Sat, Jan 23, 2021, 5:24 AM UTC

saagarjha wrote: post #96

userbinator wrote: post #93

Earlier quoted context omitted.

Coincidentally, I've been doing RE for many years, starting in the days of DOS and then moving into Windows, but it was only very recently --- less than a week ago --- that I had my first look at an app written in ObjC, and the first thing I noticed was the amount of information in the binary that seemed to almost give away most of its source: method, field, and class names everywhere. When I saw a method named somet…

Objective-C, at least these days, is plenty fast, with a the cost of a message send being comparable to a virtual function call. The fast path of objc_msgSend is just over a dozen instructions.

Post by Sunspark » Sat, Jan 23, 2021, 6:21 AM UTC

mucholove wrote: post #91

Two years ago I started writing an app in Swift. After a two year sabbatical, this was going to be my first app. When using Swift, the compiler was painstakingly slow. Because of that, I tried Objective-C and it is so clear to me that I love it. It is the best language in my humble opinion. The dynamism clicked and the modern features make it a real breeze to use. Messages are so flexible. I also love how it has “gra…