Data update

Task/Balanced-brackets/Factor/balanced-brackets-1.factor

@@ -1,22 +1,20 @@
-USING: io formatting locals kernel math sequences unicode.case ;
-IN: balanced-brackets
+USING: combinators formatting kernel math random sequences strings ;
+IN: rosetta-code.balanced-brackets
 
-:: balanced ( str -- )
-   0 :> counter!
-   1 :> ok!
-   str
-   [ dup length 0 > ]
-   [ 1 cut swap
-     "[" = [ counter 1 + counter! ] [ counter 1 - counter! ] if
-     counter 0 < [ 0 ok! ] when
-   ]
-   while
-   drop
-   ok 0 =
-   [ "NO" ]
-   [ counter 0 > [ "NO" ] [ "YES" ] if ]
-   if
-   print ;
+: balanced? ( str -- ? )
+    0 swap [
+        {
+            { CHAR: [ [ 1 + t ] }
+            { CHAR: ] [ 1 - dup 0 >= ] }
+            [ drop t ]
+        } case
+    ] all? swap zero? and ;
 
-readln
-balanced
+: bracket-pairs ( n -- str )
+    [ "[]" ] replicate "" concat-as ;
+
+: balanced-brackets-main ( -- )
+    5 bracket-pairs randomize dup balanced? "" "not " ?
+    "String \"%s\" is %sbalanced.\n" printf ;
+
+MAIN: balanced-brackets-main

Task/Balanced-brackets/Factor/balanced-brackets-2.factor

@@ -1,20 +1,22 @@
 USING: io formatting locals kernel math sequences unicode.case ;
 IN: balanced-brackets
 
-: map-braces ( -- qout )
-  [
-    {
-      { "[" [ drop  1 ] }
-      { "]" [ drop -1 ] }
-            [ drop  0 ]
-    } case
-  ]
-;
+:: balanced ( str -- )
+   0 :> counter!
+   1 :> ok!
+   str
+   [ dup length 0 > ]
+   [ 1 cut swap
+     "[" = [ counter 1 + counter! ] [ counter 1 - counter! ] if
+     counter 0 < [ 0 ok! ] when
+   ]
+   while
+   drop
+   ok 0 =
+   [ "NO" ]
+   [ counter 0 > [ "NO" ] [ "YES" ] if ]
+   if
+   print ;
 
-: balanced? ( str -- ? )
-  map-braces map sum 0 =
-;
-
-"[1+2*[3+4*[5+6]-3]*4-[3*[3+3]]]" balanced?
--- Data stack:
-t
+readln
+balanced