Update stub error messages

exercises/practice/accumulate/accumulate.rkt

@@ -3,4 +3,4 @@
 (provide accumulate)
 
 (define (accumulate sequence operation)
-  (error "Not implemented yet"))
+  (error "Please implement 'accumulate'"))

exercises/practice/acronym/acronym.rkt

@@ -3,4 +3,4 @@
 (provide acronym)
 
 (define (acronym string)
-  (error "Not implemented yet"))
+  (error "Please implement 'acronym'"))

exercises/practice/affine-cipher/affine-cipher.rkt

@@ -1,4 +1,5 @@
-#lang racket/base
+#lang racket
+
 (require racket/contract)
 
 (provide (contract-out
@@ -10,7 +11,7 @@
                    exact-nonnegative-integer? . -> . string?)]))
 
 (define (encode msg a b)
-  (error "Not implemented yet"))
+  (error "Please implement 'encode'"))
 
 (define (decode msg a b)
-  (error "Not implemented yet"))
+  (error "Please implement 'decode'"))

exercises/practice/all-your-base/all-your-base.rkt

@@ -3,4 +3,4 @@
 (provide rebase)
 
 (define (rebase list-digits in-base out-base)
-  (error "Not implemented yet"))
+  (error "Please implement rebase"))

exercises/practice/allergies/allergies.rkt

@@ -3,7 +3,7 @@
 (provide list-allergies allergic-to?)
 
 (define (list-allergies score)
-  (error "Not implemented yet"))
+  (error "Please implement 'list-allergies'"))
 
 (define (allergic-to? str score)
-  (error "Not implemented yet"))
+  (error "Please implement 'allergic-to?'"))

exercises/practice/alphametics/alphametics.rkt

@@ -3,4 +3,4 @@
 (provide solve)
 
 (define (solve puzzle)
-  (error "Not implemented yet"))
+  (error "Please implement 'solve'"))

exercises/practice/anagram/anagram.rkt

@@ -3,4 +3,4 @@
 (provide anagrams-for)
 
 (define (anagrams-for subject candidates)
-  (error "Not implemented yet"))
+  (error "Please implement 'anagrams-for'"))

exercises/practice/armstrong-numbers/armstrong-numbers.rkt

@@ -3,4 +3,4 @@
 (provide armstrong-number?)
 
 (define (armstrong-number? n)
-  (error "Not implemented yet"))
+  (error "Please implement 'armstrong-number?'"))

exercises/practice/atbash-cipher/atbash-cipher.rkt

@@ -3,7 +3,7 @@
 (provide encode decode)
 
 (define (encode m)
-  (error "Not implemented yet"))
+  (error "Please implement 'encode'"))
 
 (define (decode m)
-  (error "Not implemented yet"))
+  (error "Please implement 'decode'"))

exercises/practice/bank-account/bank-account.rkt

@@ -4,4 +4,4 @@
 
 (define bank-account%
   (class object%
-    (error "Not implemented yet")))
+    (error "Please implement 'bank-account'")))

exercises/practice/binary-search/binary-search.rkt

@@ -3,4 +3,4 @@
 (provide binary-search)
 
 (define (binary-search array value)
-  (error "Not implemented yet"))
+  (error "Please implement 'binary-search'"))

exercises/practice/bob/bob.rkt

@@ -3,4 +3,4 @@
 (provide response-for)
 
 (define (response-for prompt)
-  (error "Not implemented yet"))
+  (error "Please implement 'response-for'"))

exercises/practice/bowling/bowling.rkt

@@ -4,4 +4,4 @@
 
 (define game%
   (class object%
-    (error "Not implemented yet")))
+    (error "Please implement 'game'")))

exercises/practice/circular-buffer/circular-buffer.rkt

@@ -4,4 +4,4 @@
 
 (define circular-buffer%
   (class object%
-    (error "Not implemented yet")))
+    (error "Please implement 'circular-buffer'")))

exercises/practice/clock/clock.rkt

@@ -5,13 +5,11 @@
          subtract
          clock->string)
 
-; We have provided stubs for add, subtract, and clock->string. The clock implementation is up to you.
-
 (define (clock->string c)
-  (error "Not implemented yet"))
+  (error "Please implement 'clock->string'"))
 
 (define (add c minutes)
-  (error "Not implemented yet"))
+  (error "Please implement 'add'"))
 
 (define (subtract c minutes)
-  (error "Not implemented yet"))
+  (error "Please implement 'subtract'"))

exercises/practice/collatz-conjecture/collatz-conjecture.rkt

@@ -3,4 +3,4 @@
 (provide collatz)
 
 (define (collatz num)
-  (error "Not implemented yet"))
+  (error "Please implement 'collatz'"))

exercises/practice/darts/darts.rkt

@@ -3,4 +3,4 @@
 (provide score)
 
 (define (score x y)
-  (error "Not implemented yet"))
+  (error "Please implement 'score'"))

exercises/practice/diamond/diamond.rkt

@@ -3,4 +3,4 @@
 (provide rows)
 
 (define (rows high-char)
-  (error "Not implemented yet"))
+  (error "Please implement 'rows'"))

exercises/practice/difference-of-squares/difference-of-squares.rkt

@@ -3,10 +3,10 @@
 (provide sum-of-squares square-of-sum difference)
 
 (define (sum-of-squares number)
-  (error "Not implemented yet"))
+  (error "Please implement 'sum-of-squares'"))
 
 (define (square-of-sum number)
-  (error "Not implemented yet"))
+  (error "Please implement 'square-of-sum'"))
 
 (define (difference number)
-  (error "Not implemented yet"))
+  (error "Please implement 'difference'"))

exercises/practice/dnd-character/dnd-character.rkt

@@ -9,10 +9,10 @@
     ()) ; Add necessary struct fields
 
 (define (ability)
-  (error "Not implemented yet"))
+  (error "Please implement 'ability'"))
 
 (define (modifier value)
-  (error "Not implemented yet"))
+  (error "Please implement 'modifier'"))
 
 (define (make-character)
-  (error "Not implemented yet"))
+  (error "Please implement 'make-character'"))

exercises/practice/eliuds-eggs/eliuds-eggs.rkt

@@ -3,5 +3,5 @@
 (provide number->eggs)
 
 (define (number->eggs n)
-  (error "Not implemented yet"))
+  (error "Please implement 'number->eggs'"))
 

exercises/practice/etl/etl.rkt

@@ -3,4 +3,4 @@
 (provide etl)
 
 (define (etl input)
-  (error "Not implemented yet"))
+  (error "Please implement 'etl'"))

exercises/practice/flower-field/flower-field.rkt

@@ -3,4 +3,4 @@
 (provide annotate)
 
 (define (annotate garden)
-  (error "Not implemented yet"))
+  (error "Please implement 'annotate'"))

exercises/practice/food-chain/food-chain.rkt

@@ -3,4 +3,4 @@
 (provide recite)
 
 (define (recite start-verse end-verse)
-  (error "Not implemented yet"))
+  (error "Please implement 'recite'"))

exercises/practice/gigasecond/gigasecond.rkt

@@ -1,8 +1,6 @@
 #lang racket
 
-(require racket/date)
-
 (provide add-gigasecond)
 
 (define (add-gigasecond datetime)
-  (error "Not implemented yet"))
+  (error "Please implement 'add-gigasecond'"))

exercises/practice/grade-school/grade-school.rkt

@@ -4,4 +4,4 @@
 
 (define school%
   (class object%
-    (error "Not implemented yet")))
+    (error "Please implement 'school'")))

exercises/practice/grains/grains.rkt

@@ -3,7 +3,7 @@
 (provide square total)
 
 (define (square a-square)
-  (error "Not implemented yet"))
+  (error "Please implement 'square'"))
 
 (define (total)
-  (error "Not implemented yet"))
+  (error "Please implement 'total'"))

exercises/practice/grep/grep.rkt

@@ -3,4 +3,4 @@
 (provide grep)
 
 (define (grep flags pattern files)
-  (error "Not implemented yet"))
+  (error "Please implement 'grep'"))

exercises/practice/hamming/hamming.rkt

@@ -3,4 +3,4 @@
 (provide hamming-distance)
 
 (define (hamming-distance source target)
-  (error "Not implemented yet"))
+  (error "Please implement 'hamming-distance'"))

exercises/practice/high-scores/high-scores.rkt

@@ -4,5 +4,4 @@
 
 (define high-scores%
   (class object%
-    ; implement me!
-    (super-new)))
+    (error "Please implement 'high-scores'")))

exercises/practice/house/house.rkt

@@ -3,4 +3,4 @@
 (provide house)
 
 (define (house [start 1] [end 12])
-  'implement)
+  (error "Please implement 'house'"))

exercises/practice/isogram/isogram.rkt

@@ -3,4 +3,4 @@
 (provide isogram?)
 
 (define (isogram? s)
-  (error "Not implemented yet"))
+  (error "Please implement 'isogram?'"))

exercises/practice/kindergarten-garden/kindergarten-garden.rkt

@@ -3,4 +3,4 @@
 (provide plants)
 
 (define (plants diagram student)
-  (error "Not implemented yet"))
+  (error "Please implement 'plants'"))

exercises/practice/knapsack/knapsack.rkt

@@ -5,4 +5,4 @@
 (struct item (weight value) #:transparent)
 
 (define (maximum-value maximum-weight items)
-  (error "Not implemented yet"))
+  (error "Please implement 'maximum-value'"))

exercises/practice/largest-series-product/largest-series-product.rkt

@@ -3,4 +3,4 @@
 (provide largest-product)
 
 (define (largest-product digits span)
-  (error "Not implemented yet"))
+  (error "Please implement 'largest-product'"))

exercises/practice/leap/leap.rkt

@@ -3,4 +3,4 @@
 (provide leap-year?)
 
 (define (leap-year? year)
-  (error "Not implemented yet"))
+  (error "Please implement 'leap-year?'"))

exercises/practice/list-ops/list-ops.rkt

@@ -9,22 +9,22 @@
          my-concatenate)
 
 (define (my-length sequence)
-  (error "Not implemented yet"))
+  (error "Please implement 'my-length'"))
 
 (define (my-reverse sequence)
-  (error "Not implemented yet"))
+  (error "Please implement 'my-reverse'"))
 
 (define (my-map operation sequence)
-  (error "Not implemented yet"))
+  (error "Please implement 'my-map'"))
 
 (define (my-filter operation? sequence)
-  (error "Not implemented yet"))
+  (error "Please implement 'my-filter'"))
 
 (define (my-fold operation accumulator sequence)
-  (error "Not implemented yet"))
+  (error "Please implement 'my-fold'"))
 
 (define (my-append sequence1 sequence2)
-  (error "Not implemented yet"))
+  (error "Please implement 'my-append'"))
 
 (define (my-concatenate sequence-of-sequences)
-  (error "Not implemented yet"))
+  (error "Please implement 'my-concatenate'"))

exercises/practice/luhn/luhn.rkt

@@ -3,4 +3,4 @@
 (provide valid?)
 
 (define (valid? digits)
-  (error "Not implemented yet"))
+  (error "Please implement 'valid?'"))

exercises/practice/matching-brackets/matching-brackets.rkt

@@ -3,4 +3,4 @@
 (provide balanced?)
 
 (define (balanced? str)
-  (error "Not implemented yet"))
+  (error "Please implement 'balanced?'"))

exercises/practice/meetup/meetup.rkt

@@ -3,4 +3,4 @@
 (provide meetup-day)
 
 (define (meetup-day year month weekday week-of-month)
-  (error "Not implemented yet"))
+  (error "Please implement 'meetup-day'"))

exercises/practice/minesweeper/minesweeper.rkt

@@ -3,4 +3,4 @@
 (provide annotate)
 
 (define (annotate minefield)
-  (error "Not implemented yet"))
+  (error "Please implement 'annotate'"))

exercises/practice/nth-prime/nth-prime.rkt

@@ -3,4 +3,4 @@
 (provide nth-prime)
 
 (define (nth-prime number)
-  (error "Not implemented yet"))
+  (error "Please implement 'nth-prime'"))

exercises/practice/nucleotide-count/nucleotide-count.rkt

@@ -3,4 +3,4 @@
 (provide nucleotide-counts)
 
 (define (nucleotide-counts nucleotides)
-  (error "Not implemented yet"))
+  (error "Please implement 'nucleotide-counts'"))

exercises/practice/pangram/pangram.rkt

@@ -3,4 +3,4 @@
 (provide pangram?)
 
 (define (pangram? sentence)
-  (error "Not implemented yet"))
+  (error "Please implement 'pangram?'"))

exercises/practice/parallel-letter-frequency/parallel-letter-frequency.rkt

@@ -3,4 +3,4 @@
 (provide calculate-frequencies)
 
 (define (calculate-frequencies texts)
-  (error "Not implemented yet"))
+  (error "Please implement 'calculate-frequencies'"))

exercises/practice/pascals-triangle/pascals-triangle.rkt

@@ -3,4 +3,4 @@
 (provide rows)
 
 (define (rows height)
-  (error "Not implemented yet"))
+  (error "Please implement 'rows'"))

exercises/practice/perfect-numbers/perfect-numbers.rkt

@@ -3,4 +3,4 @@
 (provide classify)
 
 (define (classify number)
-  (error "Not implemented yet"))
+  (error "Please implement 'classify'"))

exercises/practice/phone-number/phone-number.rkt

@@ -3,4 +3,4 @@
 (provide nanp-clean)
 
 (define (nanp-clean s)
-  s)
+  (error "Please implement 'nanp-clean'"))

exercises/practice/pig-latin/pig-latin.rkt

@@ -3,4 +3,4 @@
 (provide translate)
 
 (define (translate text)
-  (error "Not implemented yet"))
+  (error "Please implement 'translate'"))

exercises/practice/protein-translation/protein-translation.rkt

@@ -3,4 +3,4 @@
 (provide proteins)
 
 (define (proteins strand)
-  (error "Not implemented yet"))
+  (error "Please implement 'proteins'"))

exercises/practice/proverb/proverb.rkt

@@ -3,4 +3,4 @@
 (provide recite)
 
 (define (recite lst)
-  (error "Not implemented yet"))
+  (error "Please implement 'recite'"))

exercises/practice/pythagorean-triplets/pythagorean-triplets.rkt

@@ -3,4 +3,4 @@
 (provide triplets-with-sum)
 
 (define (triplets-with-sum p)
-  (error "Not implemented yet"))
+  (error "Please implement 'triplets-with-sum'"))