Special Code:
Key
⌸
Index
<<
>>
{f⌿⍵}
for
f
one of
+ ⌈ ⌊ or ∧ ∨ = ≠
for boolean right arguments;
also
/
instead of
⌿
for vector right arguments
{⍺(f⌿⍵)}
{⍺,f⌿⍵}
for numeric left arguments
{≢⍵}
{⍺(≢⍵)}
{⍺,≢⍵}
for numeric left arguments
{≢∪⍵}
{⍺(≢∪⍵)}
{⍺,≢∪⍵}
for numeric left arguments
{⊂⍵}
{⍺⍵}
{⍺}
also
⊣