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anirudh-eka/transducerBlogExtractReducersExtractFilterAndMapLogic.js

Last active August 6, 2018 07:44
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transducerBlogExtractReducersExtractFilterAndMapLogic.js
const mapping = mapLogic => reducer => (a, x) => {
const transformed = mapLogic(x);
return reducer(a, transformed)
}
const filtering = filterLogic => reducer => (a, x) => {
if(filterLogic(x)) {
return reducer(a, x)
} else {
return a;
}
}
const trance = compose([filtering(x => x > 2), mapping(x => x + 1)]);
[1, 2, 3].reduce(trance((a, x) => a.concat(x)), []);
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