The Bind operator binds an array A or B to a dyadic function f either as its left or its right argument respectively. The former may be described as left argument currying and the latter as right argument currying.
A, B and Y may be any arrays whose items are appropriate to function f. In the case where B is bound as the right argument of function f, the parentheses are required in order to distinguish between the operand B and the argument Y.
The derived function is equivalent to AfY or YfB and need not return a result.
Examples
2 2∘⍴ ¨ 'AB' AA BB AA BB SINE ← 1∘○ SINE 10 20 30 ¯0.5440211109 0.9129452507 ¯0.9880316241
(*∘0.5)4 16 25 2 4 5 SQRT ← *∘.5 SQRT 4 16 25 2 4 5
The following example uses both forms of Bind to list functions in the workspace:
⎕NL 3 ADD PLUS ⎕∘←∘⎕VR¨↓⎕NL 3 ∇ ADD X [1] →LAB⍴⍨0≠⎕NC'SUM' ⋄ SUM←0 [2] LAB:SUM←SUM++/X ∇ ∇ R←A PLUS B [1] R←A+B ∇