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Languages & runtimes · #dyalog
How to invoke external programs from Dyalog APL using ⎕SH and ⎕CMD, capture and clean their output, trap failures, and avoid the performance and injection pitfalls.
Dyalog's .NET interop lets APL sessions load assemblies and call C# code directly — but runtime-version mismatches and marshaling overhead decide whether the bridge is worth crossing.
Learn how APL’s Rank operator (⍤) lets you apply scalar functions to rows or other sub‑arrays without writing explicit loops, with a concrete 3×4 matrix example.
Dyalog APL’s .PARALLEL directive lets you run matrix multiplication on multiple cores with little code change. This post shows how to apply it, what to watch for, and how to verify the speedup.
Guide to diagnosing Dyalog APL component file I/O errors (error 11 or 13) with checks for locks, corruption, component numbers, and workspace memory.
Build a modal ‘Hello’ window with a button in Dyalog APL using ⎕WC. The guide covers prerequisites, step‑by‑step creation, verification, and recovery for GUI‑enabled sessions.
Step‑by‑step guide to identify why Dyalog APL raises WS FULL, diagnose the cause, apply the appropriate fix, and verify the result.
APL's rank operator (⍤) and leading-axis model let you replace nested loops over tables and matrices with a single expression. A worked example shows daily sensor totals from 3D hourly data, plus trade-offs around readability, dialect differences, and performance.
Learn when to use ⎕A versus ⎕UCS in Dyalog APL for generating character arrays, including performance trade-offs, Unicode range handling, and validation techniques.
apl
csharp