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Task/Odd-word-problem/J/odd-word-problem-1.j

@@ -0,0 +1,26 @@
+putch=: 4 :0                 NB. coroutine verb
+  outch y
+  return x
+)
+
+isletter=: toupper ~: tolower
+
+do_char=: 3 :0                 NB. coroutine verb
+  ch=. getch''
+  if. isletter ch do.
+    if. odd do.
+      putch&ch yield do_char '' return.
+    end.
+  else.
+    odd=: -. odd
+  end.
+  return ch
+)
+
+evenodd=: 3 :0
+  clear_outstream begin_instream y
+  odd=: 0
+  whilst. '.'~:char do.
+    outch char=. do_char coroutine ''
+  end.
+)

Task/Odd-word-problem/J/odd-word-problem-2.j

@@ -0,0 +1,4 @@
+   evenodd 'what,is,the;meaning,of:life.'
+what,si,the;gninaem,of:efil.
+   evenodd 'we,are;not,in,kansas;any,more.'
+we,era;not,ni,kansas;yna,more.