Hi, In my journey to learn APL, some incorrect documentation confused me for a bit.
```
help_def(-1, "⍨", "Duplicate", "(⍨ F) B is (B F B).\n")
help_def(-2, "⍨", "Commute", "A (⍨ F) B is (B F A).\n")
```
```APL
(⍨ +) 1
SYNTAX ERROR
(⍨+)1
^ ^
(+ ⍨) 1
2
```
Patch is attached,
-- Marco Sirabella
diff --git a/src/Help.def b/src/Help.def index f4b6b17f..e3f9d2e2 100644 --- a/src/Help.def +++ b/src/Help.def @@ -241,8 +241,8 @@ help_def(1, "∇", "Function definition", "Enter or leave the del editor f // APL primitive operators (except those that are also functions) // -help_def(-1, "⍨", "Duplicate", "(⍨ F) B is (B F B).\n", "") -help_def(-2, "⍨", "Commute", "A (⍨ F) B is (B F A).\n", "") +help_def(-1, "⍨", "Duplicate", "(F ⍨) B is (B F B).\n", "") +help_def(-2, "⍨", "Commute", "A (F ⍨) B is (B F A).\n", "") help_def(-1, "¨", "Each", "Z[i] is F B[i] for all valid indices i\n", "") help_def(-2, "¨", "Each", "Z[i] is A[i] F B[i] for all valid indices i (with scalar extended A or B)\n", "") help_def(-5, ".", "Outer Product", "Z[i;j] is A[i] G B[j] for all valid indices i of A and j of B\n", "")
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