NSString Slicing in Objective C (right to left)

Question

How can I substring an NSString with the last x characters? Right to left.

In python it takes only one line!

>>> "string"[-4:]
'ring'

[String Programming Guide: Combining and Extracting Strings](http://developer.apple.com/library/mac/documentation/Cocoa/Conceptual/Strings/Articles/CreatingStrings.html#//apple_ref/doc/uid/20000148-SW5) | [`NSString` Class Reference](http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSString_Class/Reference/NSString.html) — jscs, Jan 11 '12 at 00:17

score 16 · Answer 1 · answered Jan 11 '12 at 00:16

16

It should be a one liner in Objective-C, too:

NSString *substring = [string substringFromIndex:[string length] - x];

answered Jan 11 '12 at 00:16

Carl Norum

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@Martino if you are happy with an answer, you should accept it by clicking the green √ – David Kennedy of Zenopolis Jan 11 '12 at 10:26

score 1 · Answer 2 · answered Jan 11 '12 at 00:29

You can find the answer you're looking for by checking out the documentation for NSString from the apple.developer.com website.

Specifically, you can use the substringFromIndex: method.

For example, if you already have a string called originalString and you want to obtain a string that has the last x characters. You can do:

NSString* slicedString = [originalString substringFromIndex: originalString.length-x]

This should return a string with the last x characters.

score 0 · Answer 3 · answered Jan 11 '12 at 00:17

0

int index = **Some integer value**
    NSString *string = [originalString substringFromIndex:index];
    NSString *string = [originalString substringToIndex:index];

answered Jan 11 '12 at 00:17

Dani Pralea

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score 0 · Answer 4 · answered Jan 11 '12 at 00:19

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NSString *substring = [initialstring substringFromIndex:[intialstring length] - x];

answered Jan 11 '12 at 00:19

dgund

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NSString Slicing in Objective C (right to left)

4 Answers4