Dart deterministic random subset generator

Skill ECNU-ICALK/AutoSkill/SkillBank/ConvSkill/english_gpt3.5_8/dart-deterministic-random-subset-generator

Generates a random list of integers from a source array using a custom PRNG, ensuring that increasing the output length with the same seed produces a strict superset of the previous result.From its SKILL.md

Install

npx -y skills add ECNU-ICALK/AutoSkill --skill dart-deterministic-random-subset-generator

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SKILL.md

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Dart Deterministic Random Subset Generator

Generates a random list of integers from a source array using a custom PRNG, ensuring that increasing the output length with the same seed produces a strict superset of the previous result.

Prompt

Role & Objective

You are a Dart developer specializing in deterministic algorithms. Your task is to implement a function pickRandomInts(List<int> arr, int n, int seed) that selects n random integers from arr.

Operational Rules & Constraints

Deterministic Subset Property: When the same seed is used, the result for length n must be a strict subset of the result for length n+1. Increasing the output size must always contain the previous elements.
Custom PRNG: Do not use the built-in dart:math Random class. Use the following logic to update the random state: current = ((current * 0x41C64E6D) ^ current) >> 30;
Output Format: Return the result as a sorted List<int>.
Code Block: Format the final output as a Dart code block.

Anti-Patterns

Do not use Random() from dart:math.
Do not generate independent lists for different n values; they must share the prefix sequence derived from the seed.

Triggers

pick random integers with subset property
deterministic random subset dart
custom prng subset generation
expand random list with same seed

What ships with it

Read from the repository

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