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Last change
on this file was 9af201e, checked in by MBK <marija.karapandzova@…>, 11 days ago |
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Fix frontend appearance
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Property mode
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100644
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File size:
376 bytes
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| 1 | var _group = require('./_group.js');
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| 2 | var _has = require('./_has.js');
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| 3 |
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| 4 | // Counts instances of an object that group by a certain criterion. Pass
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| 5 | // either a string attribute to count by, or a function that returns the
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| 6 | // criterion.
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| 7 | var countBy = _group(function(result, value, key) {
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| 8 | if (_has(result, key)) result[key]++; else result[key] = 1;
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| 9 | });
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| 10 |
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| 11 | module.exports = countBy;
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