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zhangchiqing/toPromiseMaybe.js

Created November 1, 2016 20:51
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Maybe Promise a -> Promise Maybe a
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toPromiseMaybe.js
var P = require('bluebird-promisell');
var S = require('sanctuary').create({ checkTypes: true, env: require('sanctury').env });
// toPromiseMaybe :: Maybe Promise a -> Promise Maybe a
var toPromiseMaybe = S.maybe(P.purep(S.Nothing()), P.liftp1(S.Just));
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