Execute: Difference between revisions

Revision as of 13:51, 10 February 2020

Execute (⍎) is a primitive function that evaluates a string as APL code.

It should be noted that executing user-provided data is not safe. Some implementations provide alternative safe functionality through the system functions Verify Input (⎕VI) and Fix Input (⎕FI)or the combined function Verify and Fix Input (⎕VFI).

Examples

      ⍎'⍳10'
1 2 3 4 5 6 7 8 9 10

A common use for this is to assign a value using a name given by a variable:

      varName←'myVar'
      myValue←42
      {⍎varName,'←⍵'}myValue
      varName
myVar
      myVar
42

APL built-ins [edit]
Primitives (Timeline)	Functions
Scalar
		Monadic	Conjugate ∙ Negate ∙ Signum ∙ Reciprocal ∙ Magnitude ∙ Exponential ∙ Natural Logarithm ∙ Floor ∙ Ceiling ∙ Factorial ∙ Not ∙ Pi Times ∙ Roll ∙ Type ∙ Imaginary ∙ Square Root ∙ Round
		Dyadic	Add ∙ Subtract ∙ Times ∙ Divide ∙ Residue ∙ Power ∙ Logarithm ∙ Minimum ∙ Maximum ∙ Binomial ∙ Comparison functions ∙ Boolean functions (And, Or, Nand, Nor) ∙ GCD ∙ LCM ∙ Circular ∙ Complex ∙ Root
Non-Scalar
		Structural	Shape ∙ Reshape ∙ Tally ∙ Depth ∙ Ravel ∙ Enlist ∙ Table ∙ Catenate ∙ Reverse ∙ Rotate ∙ Transpose ∙ Raze ∙ Mix ∙ Split ∙ Enclose ∙ Nest ∙ Cut (K) ∙ Pair ∙ Link ∙ Partitioned Enclose ∙ Partition
		Selection	First ∙ Pick ∙ Take ∙ Drop ∙ Unique ∙ Identity ∙ Stop ∙ Select ∙ Replicate ∙ Expand ∙ Set functions (Intersection ∙ Union ∙ Without) ∙ Bracket indexing ∙ Index ∙ Cartesian Product ∙ Sort
		Selector	Index generator ∙ Grade ∙ Index Of ∙ Interval Index ∙ Indices ∙ Deal ∙ Prefix and suffix vectors
		Computational	Match ∙ Not Match ∙ Membership ∙ Find ∙ Nub Sieve ∙ Encode ∙ Decode ∙ Matrix Inverse ∙ Matrix Divide ∙ Format ∙ Execute ∙ Materialise ∙ Range
Operators	Monadic	Each ∙ Commute ∙ Constant ∙ Replicate ∙ Expand ∙ Reduce ∙ Windowed Reduce ∙ Scan ∙ Outer Product ∙ Key ∙ I-Beam ∙ Spawn ∙ Function axis ∙ Identity (Null, Ident)
Operators	Dyadic	Bind ∙ Compositions (Compose, Reverse Compose, Beside, Withe, Atop, Over) ∙ Inner Product ∙ Determinant ∙ Power ∙ At ∙ Under ∙ Rank ∙ Depth ∙ Variant ∙ Stencil ∙ Cut ∙ Direct definition (operator) ∙ Identity (Lev, Dex)
Quad names	Index origin ∙ Comparison tolerance ∙ Migration level ∙ Atomic vector

@@ Line 1: / Line 1: @@
 {{Built-in|Execute|⍎}} is a [[primitive function]] that evaluates a [[string]] as APL code.
+It should be noted that executing user-provided data is not safe. Some implementations provide alternative safe functionality through the [[system function]]s [[Verify Input]] (<source lang=apl inline>⎕VI</source>) and [[Fix Input]] (<source lang=apl inline>⎕FI</source>)or the combined function [[Verify and Fix Input]] (<source lang=apl inline>⎕VFI</source>).
 == Examples ==
@@ Line 6: / Line 8: @@
 2 3 4 5 6 7 8 9 10
 </source>
-A common use for this is to assign a value using a name given by a variable:
+A common use for this is to [[assignment|assign]] a value using a name given by a variable:
 <source lang=apl>
        varName←'myVar'

Execute: Difference between revisions

Revision as of 13:51, 10 February 2020

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