just/packages/object-map/index.js at clone · hmmhmmhm/just

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module.exports = map;

// returns a new object with the predicate applied to each value

// like just-map-value, but (key, value) are passed to the predicate

map({a: 3, b: 5, c: 9}, (key, value) => value + 1); // {a: 4, b: 6, c: 10}

map({a: 3, b: 5, c: 9}, (key, value) => key); // {a: 'a', b: 'b', c: 'c'}

map({a: 3, b: 5, c: 9}, (key, value) => key + value); // {a: 'a3', b: 'b5', c: 'c9'}

function map(obj, predicate) {

var result = {};

var keys = Object.keys(obj);

var len = keys.length;

for (var i = 0; i < len; i++) {

var key = keys[i];

result[key] = predicate(key, obj[key]);

}

return result;

}