How to resolve the algorithm One of n lines in a file step by step in the Arturo programming language

Published on 12 May 2024 09:40 PM
#Arturo

How to resolve the algorithm One of n lines in a file step by step in the Arturo programming language

Table of Contents

Problem Statement

A method of choosing a line randomly from a file: Is to:

Note: You may choose a smaller number of repetitions if necessary, but mention this up-front. Note: This is a specific version of a Reservoir Sampling algorithm: https://en.wikipedia.org/wiki/Reservoir_sampling

Let's start with the solution:

Step by Step solution about How to resolve the algorithm One of n lines in a file step by step in the Arturo programming language

Source code in the arturo programming language

oneOfN: function [n][
    result: 0
    loop 0..dec n 'x [
        if zero? random 0 x ->
            result: x
    ]
    return result
]

oneOfNTest: function [n,trials][
    ret: array.of:n 0
    if n > 0 [
        loop 1..trials 'i [
            oon: oneOfN n
            ret\[oon]: ret\[oon] + 1
        ]
    ]
    return ret
]

print oneOfNTest 10 1000000

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