Minor fix: use blank?

extra/csv/csv.factor

@@ -4,7 +4,8 @@
 ! Simple CSV Parser
 ! Phil Dawes phil@phildawes.net
 
-USING: kernel sequences io namespaces combinators ;
+USING: kernel sequences io namespaces combinators
+unicode.categories ;
 IN: csv
 
 DEFER: quoted-field
@@ -29,7 +30,7 @@ DEFER: quoted-field
 
 ! trims whitespace from either end of string
 : trim-whitespace ( str -- str )
-  [ "\s\t" member? ] trim ; inline
+  [ blank? ] trim ; inline
   
 : quoted-field ( -- endchar )
   "\"" read-until                                 ! "

extra/usa-cities/usa-cities.factor

@@ -0,0 +1,51 @@
+USING: io.files io.encodings.ascii sequences sequences.lib
+math.parser combinators kernel memoize csv symbols inspector
+words accessors math.order sorting ;
+IN: zip-codes
+
+SINGLETONS: AK AL AR AS AZ CA CO CT DC DE FL GA HI IA ID IL IN
+KS KY LA MA MD ME MI MN MO MS MT NC ND NE NH NJ NM NV NY OH OK
+OR PA PR RI SC SD TN TX UT VA VI VT WA WI WV WY ;
+
+: states ( -- seq )
+    {
+        AK AL AR AS AZ CA CO CT DC DE FL GA HI IA ID IL IN KS KY
+        LA MA MD ME MI MN MO MS MT NC ND NE NH NJ NM NV NY OH OK
+        OR PA PR RI SC SD TN TX UT VA VI VT WA WI WV WY
+    } ; inline
+
+ERROR: no-such-state name ;
+
+M: no-such-state summary drop "No such state" ;
+
+MEMO: string>state ( string -- state )
+    dup states [ word-name = ] with find nip
+    [ ] [ no-such-state ] ?if ;
+
+TUPLE: city
+first-zip name state latitude longitude gmt-offset dst-offset ;
+
+MEMO: cities ( -- seq )
+    "resource:extra/zip-codes/zipcode.csv" ascii <file-reader>
+    csv rest-slice [
+        7 firstn {
+            [ string>number ]
+            [ ]
+            [ string>state ]
+            [ string>number ]
+            [ string>number ]
+            [ string>number ]
+            [ string>number ]
+        } spread city boa
+    ] map ;
+
+MEMO: cities-named ( name -- cities )
+    cities [ name>> = ] with filter ;
+
+MEMO: cities-named-in ( name state -- cities )
+    cities [
+        tuck [ name>> = ] [ state>> = ] 2bi* and
+    ] with with filter ;
+
+: find-zip-code ( code -- city )
+    cities [ first-zip>> <=> ] binsearch* ;