| 1 | function map (collection, predicate) {
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| 2 | if (!collection) return []
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| 3 | if (!predicate) {
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| 4 | predicate = function (a) {
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| 5 | return a
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| 6 | }
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| 7 | }
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| 8 |
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| 9 | var out = []
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| 10 | if (Array.isArray(collection)) {
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| 11 | for (var i = 0; i < collection.length; i++) {
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| 12 | out.push(predicate(collection[i], i))
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| 13 | }
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| 14 | return out
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| 15 | }
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| 16 |
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| 17 | if (typeof collection === 'object') {
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| 18 | var keys = Object.keys(collection)
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| 19 | for (var i = 0; i < keys.length; i++) {
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| 20 | var k = keys[i]
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| 21 | out.push(predicate(collection[k], k))
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| 22 | }
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| 23 | return out
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| 24 | }
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| 25 |
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| 26 | return out
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| 27 | }
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| 28 |
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| 29 | module.exports = { map: map }
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