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buzzdecafe/commute.js

Last active August 29, 2015 14:09
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commute.js
// run in ramda dir
var R = require('./ramda');
var Maybe = require('./ext/types/Maybe');
var ms = [Maybe(1), Maybe(2), Maybe(3)];
R.commute(Maybe.of, ms); //=> Maybe([1, 2, 3]) i.e., Just [1, 2, 3]
// or just use constructor fn:
R.commute(Maybe, ms); //=> Maybe([1, 2, 3])
ms2 = [Maybe(1), Maybe(null), Maybe(3)];
R.commute(Maybe.of, ms2); // Maybe(null) i.e. Nothing
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