objective c - Remove dot/double dot from path in iOS -


all single dot components of path must removed.

for example, "abi/./bune" should normalized "abi/bune".

all double dot components of path must removed, along parent directory. example, "abi/ba/../bune" should normalized "abi/bune".

without using regular expressions. idea how achieve?

@daniel's answer correct one. since there discussion in comments question, decided provide code example @ rey gonzales's idea of tokenizing string , using stack.

warning: code here purely educational purposes (because asked in comments question). in real life stick @daniel's solution.

the code might this:

-(nsstring *)normalizepath:(nsstring *)path {     nsarray *pathcomponents = [path componentsseparatedbystring:@"/"];      nsmutablearray *stack = [[nsmutablearray alloc] initwithcapacity:pathcomponents.count];      (nsstring *pathcomponent in pathcomponents) {         if ([pathcomponent isequaltostring:@".."]) {             [stack removelastobject];         }         else {             if (![pathcomponent isequaltostring:@"."]) {                 [stack addobject:pathcomponent];             }         }     }      return [stack componentsjoinedbystring:@"/"]; }

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