JeOam’s gists

JeOam / Hello-World.m

Created November 7, 2013 01:24

	#import <Foundation/Foundation.h>
	int main(int argc, const char * argv[])
	{
	@autoreleasepool {
	NSLog(@"Programming is fun");
	NSLog(@"Fun Fun");
	}
	return 0;
	}

JeOam / Basic Data Types(4.1)

Created November 7, 2013 04:13

	Type Constant Examples NSLog chars
	char 'a','\n' %c
	short int - %hi, %hx, %ho
	unsigned short int - %hu, %hx, %ho
	int 12, -97, oxFFE0, 0177 %i, %x, %o
	unsigned int 12u, 100u, 0Xffu %u, %x, %o
	unsigned long int 12UL, 100ul, 0xffeeUL %li, %lx, %lo
	long long int 0xe5e5e5e5LL, 500ll %lli, %llx, %llo
	unsigned long long int 12ull, oxffeeull %llu, %llx, %llo
	float 12.34f, 3.1e-5f, 0x1.5p10, 0x1p-1 %f, %e, %g, %a

JeOam / Methods for Working with Dynameic Types(9.1)

Created November 7, 2013 04:15

	Method Quesstion or Action
	-(BOOL) isKindofClass: class-object Is the object a member of class-object or a descendant?
	-(BOOL) isMemberofClass: class-object Is the object a member of class-object?
	-(BOOL) respondsToSelector: selector Can the object respond to the method specified by selector?
	+(BOOL) instancesRespondToSelector: selector Can instances of the specified class respon to selector?
	+(BOOL) isSubclassofClass: class-object Is the object of a subclass of the specified class?
	-(id) performSelector: selector Apply the method specified by selector
	-(id) performSlector: selector withObject: object Apply the method specified by selector passing the argument object
	-(id) performSelector: selector w

JeOam / Exception Handling(P412)

Created November 7, 2013 04:16

	@try{
	//some codes
	}
	@catch (NSException *exception){
	NSLog(@"Caught %@%@", exception.name, exception.reason);
	}

JeOam / NSArray class's six initialization methods(P419)

Created November 7, 2013 04:52

JeOam / enum type（P441）

Created November 7, 2013 05:02

	enum month { january = 1, february, march, april, may, june, july, august, september, october, november, december };
	enum month thisMonth;
	thisMonth = february;

JeOam / Conditional Compliation(P514)

Created November 7, 2013 05:05

JeOam / Compound Literals(P614)

Created November 7, 2013 05:16

(struct date){ .month=7, .day=2, year=2011}

JeOam / NSNumber Creation and Retrieval Methods(15.1)

Created November 7, 2013 06:04

	Creation and Initialization Initialization Instance Method Retrieval Instance Method
	numberWithChar: initWithChar: charValue
	numberWithUnignedChar: initWithUnsignedChar: unsignedCharValue
	numberWithShort: initWithShort: shortValue
	numberWithUnsignedShort: initWithUnsignedShort: unsignedShortVlaue
	numberWithInteger: initWithInteger: integerValue
	numberWithUnsignedInteger: initWithUnsignedInteger: unsignedIntegerValue
	numberWithInt: initWithInt: intValue
	numberWithUnsignedInt: initWithUnsignedInt: unsignedIntValue
	numberWithLong: initWithLong: longValue

JeOam / Common NSString Methods:(15.2)

Last active December 27, 2015 18:19

	Method Description
	+(id) stringWithContentsofFile:path encoding:enc error:err Creates a new string and sets it to the path contents
	of a file specified by the path using character encoding env,
	returning error in err if non-nil

	+(id) stringWithContentsofURL:url encoding:enc error:err Creates a new string and sets it to the contents of url
	using character encoding enc,
	returning error in err if non-nil

	+(id) string Creates a new empty string

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