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djfm/chain-simple.js

Created September 18, 2016 12:35
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chain-simple.js
const chain = (...fns) => initialValue =>
fns.reduce((previousOutput, fn) => fn(previousOutput), initialValue);
chain(x => x + 1, x => x / 2)(0).should.equal(0.5);
chain(x => x / 2, x => x + 1)(0).should.equal(1);
// run it: https://jsfiddle.net/s8hwae47/
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