base-show

Generate Base.show and Base.summary methods for Julia custom types.

90|16|Updated Apr 4, 2019
One-click install
npx skills add https://github.com/CliMA/CalibrateEmulateSample.jl --skill base-show
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: base-show
Source: https://github.com/CliMA/CalibrateEmulateSample.jl/tree/main/.claude/skills/base-show
Command: npx skills add https://github.com/CliMA/CalibrateEmulateSample.jl --skill base-show

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Julia's default REPL output for custom types holding large or nested data structures like DataFrames, dictionaries, or multi-field structs is often overwhelming, verbose, and hides key identifying information, making interactive development slow and frustrating.

Core Features & Use Cases

  • Adds custom Base.show and Base.summary methods to Julia custom types to produce concise, informative REPL output.
  • Handles both full multi-line display for standalone objects and compact single-line display for objects embedded in containers like arrays or dictionaries.
  • Includes robust unit tests to validate output structure, ensure no regressions, and confirm compliance with Julia's display conventions.
  • Use Case: For a Julia struct wrapping a trained machine learning emulator and its training data, the default REPL dumps all nested matrix and model contents; this skill makes it show a short summary of the emulator type, input/output dimensions, and training sample count instead.

Quick Start

Invoke the base-show skill to add clean, concise display methods to any Julia custom type that prints noisy or unhelpful output in the REPL.

Frequently Asked Questions about base-show

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I customize Julia REPL output for custom types holding large data structures?

To customize Julia REPL output for custom types, you need to override Base.show and Base.summary methods. This skill generates compliant methods that produce concise, informative output for structs containing DataFrames, dictionaries, or multi-field nested data.

Why does my Julia struct print verbose recursive dumps in the REPL?

Julia structs print verbose recursive dumps because the default REPL output recursively expands nested data structures like arrays or DataFrames. Overriding the Base.show method allows you to replace this noisy output with a compact summary of key identifying information.

How to implement compact single-line display for Julia objects embedded in arrays?

Implement compact single-line display for embedded Julia objects by extending Base.show with a compact branch. This skill generates the necessary code to differentiate between standalone multi-line output and single-line output for objects inside containers.

Does customizing Base.show methods require writing unit tests for Julia packages?

Customizing Base.show methods requires unit tests to validate output structure and prevent regressions. This skill automatically generates accompanying tests that confirm your custom display methods comply with Julia's display conventions.

What is the best way to clean up noisy REPL output for a Julia machine learning emulator struct?

The best way to clean up noisy REPL output for a Julia machine learning emulator is to override Base.show. This skill generates methods that display a short summary of the emulator type, input/output dimensions, and training sample count instead of dumping nested matrices.

When do I need custom Base.summary methods for Julia package development?

You need custom Base.summary methods for Julia package development when your structs contain large or nested data structures that produce unreadable default output. This skill generates these methods to ensure your custom types display concise identifying information.