Fix tests for strain and other small changes

Author: ingydotnet

Diff for: exercises/practice/pangram/.meta/pangram.ys

@@ -1,7 +1,6 @@
 !yamlscript/v0
 
 defn is-pangram(sentence):
-  26 ==:
-    len: lc(sentence)
+  26 ==: lc(sentence)
            .replace(/[^a-z]/)
-           .distinct()
+           .distinct():len

Diff for: exercises/practice/perfect-numbers/perfect-numbers-test.ys

@@ -16,6 +16,7 @@ test::
 - name: Large perfect number is classified correctly
   code: classify(33550336)
   want: perfect
+  SKIP: true   # SLOW
 
 - name: Smallest abundant number is classified correctly
   code: classify(12)
@@ -28,6 +29,7 @@ test::
 - name: Large abundant number is classified correctly
   code: classify(33550335)
   want: abundant
+  SKIP: true   # SLOW
 
 - name: Smallest prime deficient number is classified correctly
   code: classify(2)
@@ -44,6 +46,7 @@ test::
 - name: Large deficient number is classified correctly
   code: classify(33550337)
   want: deficient
+  SKIP: true   # SLOW
 
 - name: Edge case (no factors other than itself) is classified correctly
   code: classify(1)
@@ -59,4 +62,4 @@ test::
   what: error
   want: Classification is only possible for positive integers.
 
-done: 13
+done: 10 # 13

Diff for: exercises/practice/raindrops/.meta/raindrops.ys

@@ -4,10 +4,6 @@ defn convert(number):
   ps =: M(3 'Pling' 5 'Plang' 7 'Plong')
   words =:
     mapcat _ [3 5 7]:
-      fn(n):
-        (number % n) == 0 &&&:
-          get ps: n
+      fn(n): number.rem(n).! &&& ps.$n
 
-  if words.?:
-    str(words*)
-    str(number)
+  if words.?: str(words*) str(number)

Diff for: exercises/practice/resistor-color-duo/.meta/resistor-color-duo.ys

@@ -7,4 +7,3 @@ colors =:
 
 defn value([c1 c2]):
   colors.$c1 * 10 +: colors.$c2
-

Diff for: exercises/practice/strain/strain-test.ys

@@ -6,35 +6,35 @@ use: strain
 
 test::
 - name: Keep on empty list returns empty list
-  code: keep([] "fn([x] true)")
+  code: keep([] \(true))
   want: []
 
 - name: Keeps everything
-  code: keep([1 3 5] "fn(x):\ true")
+  code: keep([1 3 5] \(true))
   want:
   - 1
   - 3
   - 5
 
 - name: Keeps nothing
-  code: keep([1 3 5] "fn(x):\ false")
+  code: keep([1 3 5] \(false))
   want: []
 
 - name: Keeps first and last
-  code: keep([1 2 3] "fn(x):\ (x % 2) == 1")
+  code: keep([1 2 3] \((_ % 2) == 1))
   want:
   - 1
   - 3
 
 - name: Keeps neither first nor last
-  code: keep([1 2 3] "fn(x):\ (x % 2) == 0")
+  code: keep([1 2 3] \((_ % 2) == 0))
   want:
   - 2
 
 - name: Keeps strings
   code: keep(
           qw(apple zebra banana zombies cherimoya zealot)
-          "fn(x):\ starts?(x, 'z')")
+          \(starts?(_ 'z')))
   want:
   - zebra
   - zombies
@@ -43,7 +43,7 @@ test::
 - name: Keeps lists
   code: keep(
           [[1 2 3] [5 5 5] [5 1 2] [2 1 2] [1 5 2] [2 2 1] [1 2 5]]
-          "fn(x):\ has?(x, 5)")
+          \(has?(_ 5)))
   want:
   - - 5
     - 5
@@ -59,35 +59,35 @@ test::
     - 5
 
 - name: Discard on empty list returns empty list
-  code: discard([] "fn(x):\ true")
+  code: discard([] \(true))
   want: []
 
 - name: Discards everything
-  code: discard([1 3 5] "fn(x):\ true")
+  code: discard([1 3 5] \(true))
   want: []
 
 - name: Discards nothing
-  code: discard([1 3 5] "fn(x):\ false")
+  code: discard([1 3 5] \(false))
   want:
   - 1
   - 3
   - 5
 
 - name: Discards first and last
-  code: discard([1 2 3] "fn(x):\ (x % 2) == 1")
+  code: discard([1 2 3] \((_ % 2) == 1))
   want:
   - 2
 
 - name: Discards neither first nor last
-  code: discard([1 2 3] "fn(x):\ (x % 2) == 0")
+  code: discard([1 2 3] \((_ % 2) == 0))
   want:
   - 1
   - 3
 
 - name: Discards strings
   code: discard(
           qw(apple zebra banana zombies cherimoya zealot)
-          "fn(x):\ starts?(x, 'z')")
+          \(starts?(_ 'z')))
   want:
   - apple
   - banana
@@ -96,7 +96,7 @@ test::
 - name: Discards lists
   code: discard(
           [[1 2 3] [5 5 5] [5 1 2] [2 1 2] [1 5 2] [2 2 1] [1 2 5]]
-          "fn(x):\ has?(x, 5)")
+          \(has?(_ 5)))
   want:
   - - 1
     - 2