ascii: adding title case.

mrjbq7 · Apr 5, 2012 · 66ecd19 · 66ecd19
1 parent c8e2bd6
commit 66ecd19
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Showing 3 changed files with 19 additions and 3 deletions.
diff --git a/basis/ascii/ascii-docs.factor b/basis/ascii/ascii-docs.factor
@@ -57,6 +57,14 @@ HELP: >upper
 { $values { "str" "a string" } { "upper" "a string" } }
 { $description "Converts an ASCII string to upper case." } ;
 
+HELP: >title
+{ $values { "string" "a string" } { "title" "a string" } }
+{ $description "Converts a string to title case." } ;
+
+HELP: >words
+{ $values { "str" "a string" } { "words" "an array of strings" } }
+{ $description "Divides the string up into words." } ;
+
 ARTICLE: "ascii" "ASCII"
 "The " { $vocab-link "ascii" } " vocabulary implements support for the legacy ASCII character set. Most applications should use " { $link "unicode" } " instead."
 $nl
@@ -77,6 +85,7 @@ $nl
     ch>upper
     >lower
     >upper
+    >title
 } ;
 
 ABOUT: "ascii"
diff --git a/basis/ascii/ascii-tests.factor b/basis/ascii/ascii-tests.factor
@@ -1,4 +1,5 @@
-USING: ascii tools.test sequences kernel math ;
+USING: ascii tools.test sequences kernel math strings ;
+
 IN: ascii.tests
 
 [ t ] [ CHAR: a letter? ] unit-test
@@ -17,3 +18,5 @@ IN: ascii.tests
 
 [ "HELLO HOW ARE YOU?" ] [ "hellO hOw arE YOU?" >upper ] unit-test
 [ "i'm good thx bai" ] [ "I'm Good THX bai" >lower ] unit-test
+[ "Hello How Are You?" ] [ "hEllo how ARE yOU?" >title ] unit-test
+[ { " " "Hello" "    " "World" } ] [ " Hello    World" >words [ >string ] map ] unit-test
diff --git a/basis/ascii/ascii.factor b/basis/ascii/ascii.factor
@@ -1,7 +1,7 @@
 ! Copyright (C) 2005, 2009 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: kernel math math.order sequences strings
+USING: combinators.short-circuit hints kernel math math.order
-combinators.short-circuit hints ;
+sequences splitting.monotonic strings ;
 IN: ascii
 
 : ascii? ( ch -- ? ) 0 127 between? ; inline
@@ -18,6 +18,10 @@ IN: ascii
 : >lower ( str -- lower ) [ ch>lower ] map ;
 : ch>upper ( ch -- upper ) dup letter? [ 0x20 - ] when ; inline
 : >upper ( str -- upper ) [ ch>upper ] map ;
+: >words ( str -- words ) [ [ blank? ] bi@ = ] slice monotonic-slice ;
+: capitalize ( str -- title ) unclip [ >lower ] [ ch>upper ] bi* prefix ;
+: >title ( str -- title ) >words [ capitalize ] map concat ;
 
 HINTS: >lower string ;
 HINTS: >upper string ;
+