thi-ng / blog Goto Github PK

// Replicate Array.map()
transduce(mul10, push(), null, [1, 2, 3, 4]);
// [10, 20, 30, 40]

// overlaps can be achieved via optional step size
tx.transduce(tx.partition(3, 1), tx.push(), tx.range(10));
// [
//   [0, 1, 2],
//   [1, 2, 3],
//   [2, 3, 4],
//   [3, 4, 5],
//   [4, 5, 6],
//   [5, 6, 7],
//   [6, 7, 8],
//   [7, 8, 9],
// ]

// leaky integrator which stops when difference between
// prev/curr goes below 1
[
    ...tx.converge(
        (a, b) => Math.abs(a - b) < 1,
        tx.iterate((x) => x + (100 - x) * 0.5, 0)
    ),
];