NSCharacterSet - append another character set

Question

I would like to create a character set that includes all of its own characters, as well as those from another character set. Append in other words.

I thought there'd be an obvious way, but after control-space completion in the IDE, and then poking around the docs, I couldn't fine anything.

I can see how to append all the characters from a string. But I need to append the characters from another set. I guess I could to-string the second set, if there's a to-string method.

How do I do this?

Did you look at the methods in the NSMutableCharacterSet reference? — rdelmar, Sep 15 '13 at 05:17
@rdelmar Yes, the mutable set lets me add characters from a string or range. But how to I just add another instance of NSCharacterSet? — Jasper Blues, Sep 15 '13 at 05:19
formIntersectionWithCharacterSet: lets you add one index set to another. Is that what you want? — rdelmar, Sep 15 '13 at 05:31
Yes, that was helpful. I didn't see those methods. . (NB: formUnion is the actual one I want). — Jasper Blues, Sep 15 '13 at 06:15

B.S. · Accepted Answer · 2013-09-15T05:43:43.263

26

You are probably seaching for this method in NSMutableCharacterSet :

- (void)formUnionWithCharacterSet:(NSCharacterSet *)otherSet

From Doc:

Modifies the receiver so it contains all characters that exist in either the receiver or otherSet.

edited Sep 15 '13 at 05:43

answered Sep 15 '13 at 05:38

B.S.

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From what I can tell all the character sets are NSCharacterSet so they don't have access to the formUnionWithCharacterSet method. How do we combine multiple NSCharacterSets? – Luke Pighetti Sep 22 '19 at 15:45
@LukePighetti use mutableCopy on a NSCharacterSet: [[NSCharaterSet alphanumericCharacterSet] mutableCopy] – Stefanf Feb 17 '23 at 19:11

score 15 · Answer 2 · answered Jul 23 '17 at 18:53

15

For Swift 3:

let fullCharset = aCharset.union(anotherCharset)

answered Jul 23 '17 at 18:53

William Denniss

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NSCharacterSet - append another character set

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