Sequencer

Create infinite-length sequences from your iterables

const {
    XorShift,
    AbstractSequencer,
    NaiveSequencer,
    DeduplicationSequencer
} = require('infinite-sequencer');
const arr = [1,2,3,4,5,6];
const seq = new NaiveSequencer(arr);
while(true) {
   seq.next(); // {value: number, done: false}
}

AbstractSequencer(sequence, prng)

Abstract class, provides methods next and getter size. Subclasses must implement method getNextValue, returning value.

• sequence must be an finite iterable
• prng must be either object with method random, returning number from 0 to 1. Default to Math builtin object.

NaiveSequencer(sequence, prng)

Generates stream of random values from sequence.

DeduplicationSequencer(sequence, prng, {rate, lastEntriesCount, flip})

Generates stream of random values. Drawing a value lowers chance of getting the same value in lastEntriesCount next items.

Optimized for human skewed sense of "randomness".

• rate=0.5 - chance to redraw, compared to result of flip
• flip(randomValue: Number, i: Int32, lastItemsPositions: Int32[]) - function to determine chances. Defaults to identity - randomValue=>randomValue.
• lastEntriesCount=5 - determines number last elements to check.