⍎ — Execute

Keys: Alt-o b. Ranks: 1 monadic, ∞ ∞ dyadic

⍎Y evaluates character code in the current lexical scope.

⍎"2+3"             ⍝ 5
x←7 ⋄ ⍎"x+1"       ⍝ 8

On a character matrix, ⍎ evaluates each row. On an array of strings, it evaluates each string.

⍎["1+1"⋄"2×3"]    ⍝ 2 6
⍎"1+1" "2×3"        ⍝ 2 6

Assignments and explicit output in ⍎Y take effect in the current scope.

T⍎Y evaluates Y with each key of the keyed vector T as a name for its item, as Dot’s T.(expr) does. Names that aren’t keys resolve in the current scope. Assignments stay inside the evaluation, and leave T unchanged.

T←["a":1 "b":2] ⋄ T⍎"a+b"      ⍝ 3
T←["a":1] ⋄ T⍎"a←5 ⋄ a+1"      ⍝ 6

Inverse

⍎⁻¹Y writes Y as BPL source that ⍎ reads back, as •literal⁻¹ does.

⍎⁻¹1 2.5   ⍝ "[1 2.5]ₚ"

Errors

• DOMAIN: T isn’t a keyed vector