updates

container.rkt

@@ -44,6 +44,6 @@
     [(list? container) (member item container)] ; returns #f or sublist beginning with item
     [(vector? container) (member item (vector->list container))] ; returns #f or sublist beginning with item
     [(hash? container) (and (hash-has-key? container item) (get container item))] ; returns #f or hash value
-    [(string? container) (and (string? item) (regexp-match (->string item) (->string container)))] ; returns #f or substring beginning with item
-    [(symbol? container) (and (symbol? item) ((->string item) . in? . (->string container)))] ; returns #f or subsymbol (?!) beginning with item
+    [(string? container) (regexp-match (->string item) (->string container))] ; returns #f or substring beginning with item
+    [(symbol? container) ((->string item) . in? . (->string container))] ; returns #f or subsymbol (?!) beginning with item
     [else #f]))

debug.rkt

@@ -4,7 +4,7 @@
 
 (define-syntax-rule (report var)
   (begin 
-    (displayln (format "~a = ~a" 'var var) (current-error-port)) 
+    (displayln (format "~a = ~v" 'var var) (current-error-port)) 
     var))
 
 (require (prefix-in williams: describe))