| 1 | Object.prototype.map = function(fn){ return Object.entries(this).reduce((acc,[k,v]) => ({...acc,[k]:fn(v,k)}),{}); };
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| 2 | Object.prototype.filter = function(fn){ return Object.entries(this).reduce((acc,[k,v]) => fn(v,k) && ({...acc,[k]:v}),{}) || acc; };
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| 3 |
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| 4 | const map = fn => col => col.map(fn);
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| 5 | const filter = fn => col => col.filter(fn);
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| 6 |
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| 7 | module.exports = {map, filter};
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