randomSubsequence - nodef/extra-array GitHub Wiki

Pick an arbitrary subsequence.

Similar: randomSubsequence, subsequences, hasSubsequence, searchSubsequence.

function randomSubsequence(x, n, fr)
// x:  an array
// n:  number of values [-1 ⇒ any]
// fr: random number generator ([0, 1))

const xarray = require('extra-array');

var x = [1, 2, 3, 4, 5];
xarray.randomSubsequence(x);
// → [ 1, 2 ]

xarray.randomSubsequence(x, 3);
// → [ 1, 3, 5 ]

xarray.randomSubsequence(x, 2);
// → [ 3, 5 ]

References

• shuffle() : PHP
• shuffle-seed : @webcaetano
• shuffle-array : @pazguille
• Seeding the random number generator in Javascript