Execute: Difference between revisions

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{{Built-in|Execute|⍎}} is a [[primitive function]] that evaluates a [[string]] as APL code.
{{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>).
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]] (<syntaxhighlight lang=apl inline>⎕VI</source>) and [[Fix Input]] (<syntaxhighlight lang=apl inline>⎕FI</source>)or the combined function [[Verify and Fix Input]] (<syntaxhighlight lang=apl inline>⎕VFI</source>).


== Examples ==
== Examples ==
<source lang=apl>
<syntaxhighlight lang=apl>
       ⍎'⍳10'
       ⍎'⍳10'
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10
</source>
</source>
A common use for this is to [[assignment|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>
<syntaxhighlight lang=apl>
       varName←'myVar'
       varName←'myVar'
       myValue←42
       myValue←42
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* [https://help.dyalog.com/latest/#Language/Primitive%20Functions/Execute.htm Dyalog]
* [https://help.dyalog.com/latest/#Language/Primitive%20Functions/Execute.htm Dyalog]
* [http://microapl.com/apl_help/ch_020_020_710.htm APLX]
* [http://microapl.com/apl_help/ch_020_020_710.htm APLX]
* J [https://www.jsoftware.com/help/dictionary/d601.htm Dictionary], [https://code.jsoftware.com/wiki/Vocabulary/quotedot NuVoc] (as <source lang=j inline>".</source>)
* J [https://www.jsoftware.com/help/dictionary/d601.htm Dictionary], [https://code.jsoftware.com/wiki/Vocabulary/quotedot NuVoc] (as <syntaxhighlight lang=j inline>".</source>)
{{APL built-ins}}[[Category:Primitive functions]]
{{APL built-ins}}[[Category:Primitive functions]]

Revision as of 21:08, 10 September 2022

⍎

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 (<syntaxhighlight lang=apl inline>⎕VI</source>) and Fix Input (<syntaxhighlight lang=apl inline>⎕FI</source>)or the combined function Verify and Fix Input (<syntaxhighlight lang=apl inline>⎕VFI</source>).

Examples

<syntaxhighlight lang=apl> 

     ⍎'⍳10'

1 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: <syntaxhighlight lang=apl> 

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

myVar 

     myVar

42 </source>

See also

External links

Tutorials

Documentation

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)
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
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