flyd-droprepeats

flyd-droprepeats

Drops consecutively repeated values from a Flyd stream.

API

dropRepeats(s)

Drops repeated values from stream s. Equality is determined by reference.

Signature

Stream a -> Stream a

Usage

var dropRepeats = require('flyd-droprepeats').dropRepeats;
var append = function(arr, x) {
  return arr.concat(x);
};

var s = flyd.stream();
var noRepeats = dropRepeats(s);
var collect = flyd.scan(append, [], noRepeats);
s(1)(2)(2)(3);
collect() // [1, 2, 3]

dropRepeatsWith(fn, s)

Drops repeated values from stream s, but also takes a function fn that will be used to determine equality.

Signature

(a -> b -> Boolean) -> Stream a -> Stream a

var dropRepeatsWith = require('flyd-droprepeats').dropRepeatsWith;
var s = flyd.stream();
// Ramda's `equals` determines equality by value
var noRepeats = dropRepeatsWith(R.equals, s);
var collect = flyd.scan(append, [], noRepeats);
s({ foo: 'bar' });
s({ foo: 'bar' });
collect() // [{ foo: 'bar' }]