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1. Top results related to is objective-c a strict superset of ansi c?

   • Is C# a super set of C just like Objective-C and C++?

     Top Answer

     Answered Dec 21, 2011 · 7 votes

     No you can not wirte C code in C# and it is not a superset of C or any other language. Read introduction about C# here http://msdn.microsoft.com/library/z1zx9t92.aspx

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     1/5

   • What does "Objective-C is a superset of C more strictly than C++" mean exactly?

     Top Answer

     Answered Aug 08, 2016 · 137 votes

     I prepared a simple diagram; it is not very pretty, but hopefully gets the point across:

     • Red: the set of all programs valid in C, C++, and Objective-C (relatively small)
     • Green: the set of all programs valid in C and Objective-C, but invalid in C++ (even smaller)
     • Gray: the set of all programs valid in Objective C and C++, but invalid in C (empty, as far as I know)
     • Blue: the set of all programs valid only in Objective C (relatively large)
     • Yellow: the set of all programs valid only in C++ (largest)

     The set of valid C programs (in red and green) is an strict subset of the set of valid Objective C programs (blue)

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     2/5

   • Objective-C: What is a lazy class?

     Top Answer

     Answered Mar 10, 2013 · 15 votes

     I found the answer: It's all about a class implementing or not a +load method.

     All the classes implemented in a given image file have a reference in a list stored in the "__DATA, __objc_classlist, regular, no_dead_strip" binary's section. This list allows the runtime system to keep track of all the classes stored in such file. However, not all of the classes need to be realized when the program starts up. That's why when a class implements a +load method, it also has a reference in a list stored in the "__DATA, __objc_nlclslist, regular, no_dead_strip" section.

     So, _getObjc2NonlazyClassList retrieves the list of classes that do implement a +load method and are so called non-lazy. _getObjc2ClassList retrieves a list of all the classes in a image file, including the classes that don't have a +load method (and are called lazy) and the non-lazy ones. Non-lazy classes must be realized when the program starts up. Lazy classes, on the other hand, don't need to be realized immediately. This may be delayed until the class receives a message for the first time, for example (that's the reason for them to be considered "lazy").

     The same is true for categories, by the way.

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     3/5

   • Objective-C: How to check a number is between two values

     Top Answer

     Answered Jul 11, 2011 · 6 votes

     Unless your compiler is broken there is nothing wrong with that code. There is probably something wrong with x

     As Sascha stated in the comments make sure that x is not an NSNumber. The reason for this is if x is an NSNumber then the value stored in it is a pointer which value would likely be much higher than 100 (0x4FBC60 for example) and you would want to compare against the -(int)intValue.

     Other things to consider are comparing against the right data. While implicit number conversions work well you may want to use the same literal comparison as your data type.

     unsigned long long x = 51ull;if(x > 50ull && x < 100ull){-}-

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     4/5

   • Objective-C how to check if a string is null

     Top Answer

     Answered Mar 08, 2010 · 20 votes

     Your first warning looks like you're trying to call objectForKey on an NSArray. Which isn't going to work, as NSArray doesn't have an objectForKey method.

     As for the second warning you can just compare directly with nil, ie:

     if (temp != nil)-

     or since nil is equivalent to 0, you can also just do:

     if (temp)-

     Other Answers

     Answered Aug 24, 2012 · 17 votes

     After trying all the options, i think this is the best option to comapre NSString null

     if ( temp != ( NSString *) [ NSNull null ] ){ // do some thing}

     Other Answers

     Answered Feb 13, 2013 · 14 votes

     Both of the answers previously given missed a fundamental point: you can't put nil into an array, so you'll never get nil out of an array. Using NSNull

     as a placeholder in an array is the correct thing to do, however your variable temp then cannot be declared as an NSString *, as it might not be one. Use either NSObject * or id as the type of the variable to suppress the comparison warning.

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     5/5

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2. stackoverflow.com › questions › 4317652Which dialect of C is Objective-C a "strict superset" of ...

   stackoverflow.com › questions › 4317652

   • Cached

   Nov 30, 2010 · Objective C is usually thought of a strict superset of ANSI-C (which is the same as C90). However, Objective C isn't a standardized language or anything of that sort. It's description basically is "Take C, and add these features to it".

3. en.wikipedia.org › wiki › Objective-CObjective-C - Wikipedia

   en.wikipedia.org › wiki › Objective-C

   • Cached

   Since Objective-C is a strict superset of C, it does not treat C primitive types as first-class objects. Unlike C++ , Objective-C does not support operator overloading . Also unlike C++, Objective-C allows an object to directly inherit only from one class (forbidding multiple inheritance ).

4. www.geeksforgeeks.org › what-is-objective-cWhat Is Objective C? (Definition, Uses, vs. Swift ...

   www.geeksforgeeks.org › what-is-objective-c

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   Mar 5, 2024 · Objective-C is a superset of the C programming language, which means Objective-C extends C with its object-oriented features. It combines the features and syntax of the C programming language with Smalltalk-style messaging objects.

5. link.springer.com › content › pdfLanguage Elements - Springer

   link.springer.com › content › pdf

   As Objective-C is a strict superset of the C programming language. It supports all of the standard ANSI C data types and type qualifiers. Objective-C also defines a number of language-specific data types (BOOL type, class instance types, id type, class definition types, block type). These are discussed in the following paragraphs. BOOL Type

6. link.springer.com › chapter › 10Language Elements | SpringerLink

   link.springer.com › chapter › 10

   • Cached

   Sep 2, 2013 · Its scope is the Objective-C language extensions to ANSI C. The fundamental elements of the C programming language are not covered here; they can be found in numerous other references. Download chapter PDF. Appendix A provides a concise summary of the basic elements of the Objective-C language.

7. cgi.csc.liv.ac.uk › COMP327 › T4-ObjectiveC10COMP327 Mobile Computing - Liverpool

   cgi.csc.liv.ac.uk › COMP327 › T4-ObjectiveC10

   What is Objective-C. •An object-oriented language. •“..focused on simplicity and the elegance of object oriented design...” •A strict superset of ANSI C. •Very Different (and somewhat simpler) to C++. •Exploits a number of object oriented principles. •Inherits many principles from Smalltalk. •Used to develop the Cocoa API Framework.

8. People also ask

   Why is Objective-C a superset of C?

   • Since Objective-C is a strict superset of C, it does not treat C primitive types as first-class objects . Unlike C++, Objective-C does not support operator overloading. Also unlike C++, Objective-C allows an object to directly inherit only from one class (forbidding multiple inheritance ).

   Objective-C - Wikipedia

   en.wikipedia.org/wiki/Objective-C

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   Is Objective-C a strict superset of ANSI C?

   • Objective-C is a strict superset of ANSI C ^ "Examining Objective-C". Archived from the original on September 4, 2014. Retrieved September 4, 2014. Objective-C is an object-oriented strict superset of C ^ Lee, Keith (September 3, 2013). Pro Objective-C. Apress. ISBN 9781430250500. Archived from the original on May 14, 2018.

   Objective-C - Wikipedia

   en.wikipedia.org/wiki/Objective-C

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   What is the difference between C and Objective-C?

   • Objective-C is a thin layer atop C and is a "strict superset " of C, meaning that it is possible to compile any C program with an Objective-C compiler and to freely include C language code within an Objective-C class. Objective-C derives its object syntax from Smalltalk.

   Objective-C - Wikipedia

   en.wikipedia.org/wiki/Objective-C

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   Is Objective C a programming language?

   • Objective-C is a general-purpose, object-oriented programming language that was developed in the early 1980s by Brad Cox and Tom Love. Mainly, it is used for software development on Apple’s macOS, iOS (mobile), watchOS, and TVOS platforms.

   What Is Objective C? (Definition, Uses, vs. Swift)

   www.geeksforgeeks.org/what-is-objective-c/

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9. www.informit.com › articles › articleObjective-C Boot Camp | The Objective-C ... - InformIT

   www.informit.com › articles › article

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   Objective-C is a strict superset of ANSI C. C is a compiled, procedural programming language developed in the early 1970s at AT&T. Objective-C, which was developed by Brad J. Cox in the early 1980s, adds object-oriented features to C.