How to change String value comparison

Question

In my code I need to compare string letters but my problem is that lower case letters are greater than upper case letter.

For example Z < a.

How could I implement this in my code ?

Thanks

score 3 · Accepted Answer · answered Mar 08 '10 at 15:48

3

String.Compare(string1, string2, false);

String.Compare will do a string comparisson and ignore their case. It returns an integer representing the match.

Using your example:

// Will result in true
String.Compare("Z", "a", false) > 0

answered Mar 08 '10 at 15:48

Josh

he said, that he'd like to compare chars, not a whole string. therefore he'd need to browse through the string maybe with charAt and do the comparision then... – Gnark Mar 08 '10 at 15:51
Either way String.Compare will work. If you pass in a single character it will work, or if you pass in something like "Bob" it will do an ordinal comparisson and return their lexical relationship. This is what .Net will use under the hood when sorting an array of strings. – Josh Mar 08 '10 at 15:54

score 3 · Answer 2 · answered Mar 08 '10 at 15:48

just use :

String.Compare( string , string , StringComparison)

with the StringComaparison set to InvariantCultureIgnoreCase , OrdinalIgnoreCase or CurrentCultureIgnoreCase depending on context....

score 2 · Answer 3 · answered Mar 08 '10 at 15:45

2

What if you make them both uppercase and compare afterwards ? (I guess you do not want to test equality)

answered Mar 08 '10 at 15:45

thelost

score 0 · Answer 4 · answered Mar 08 '10 at 15:46

0

Are you using char's in the end? If yes, you could just remap the ranges of the integer values of the characters.

answered Mar 08 '10 at 15:46

Marcel

4 Answers4