Re: automate tuple creation

[forkit via Digitalmars-d-learn]

On Wednesday, 19 January 2022 at 22:35:58 UTC, Ali Çehreli wrote:


so I combined ideas from all responses:

// --
module test;

import std.stdio : writeln;
import std.range : iota, isForwardRange, hasSlicing, hasLength, 
isInfinite, array;
import std.random : Random, unpredictableSeed, dice;
import std.algorithm : map;

@safe:

Random rnd;

static this()
{
  rnd = Random(unpredictableSeed);
}

void main()
{
    uint[][] mArrBool;

    // e.g: create a matrix consisting of 5 tuples, with each 
tuple containing 3 random bools (0 or 1)
    createBoolMatrix(mArrBool,5, 2);

    process(mArrBool);
}

void createBoolMatrix(ref uint[][] m, size_t numberOfTuples, 
size_t numberOfBoolsInTuple)
{
    m = iota(numberOfTuples)
            .map!(i => iota(numberOfBoolsInTuple)
            .map!(numberOfBoolsInTuple => cast(uint) 
rnd.dice(0.6, 1.4))
                        .array).array;
}

void process(T)(const ref T t) if (isForwardRange!T && 
hasSlicing!T && hasLength!T && !isInfinite!T)
{
    t.writeln;
}

//--