StringCompare - Cookbook - s c h e m a t i c s : c o o k b o o k

Comparing Strings

Solution

All of the R5RS functions are in the form stringop?, e.g. string<=? or string>?. The operators defined are >, >=, <, <=, and =.

> (string<=? "ABC" "abc")
#t
> (string<=? "abc" "abc")
#t
> (string=? "ABC" "abc")
#f
> (string<? "abd" "abc")
#f

Lower case characters are considered greater than uppercase:

> (string>? "AAA" "aaa")
#f
> (string<? "AAA" "aaa")
#t

There are also case insensitive versions in the form string-ciop?

> (string-ci=? "AAA" "aaa")
#t

Discussion

TODO: talk about case sensitivity when you're working with text that's not English.

-- GordonWeakliem - 09 Apr 2004

CookbookForm
TopicType:	Recipe
ParentTopic:	StringRecipes
TopicOrder:	160

Current Rev: r1.4 - 09 Jun 2004 - 15:42 GMT - NoelWelsh, Revision History:Diffs | r1.4 | > | r1.3 | > | r1.2

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s c h e m a t i c s : c o o k b o o k

Comparing Strings

Problem

Solution

Discussion