Object Key Zipping?

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
48/100
Issue type
Feature
Clarity
Clearly specified
Activity status
Stale
Tech stack
javascript
Domain
tooling

Research direction

Start with the existing zip entry point and compare its behavior with the before and after examples. Review the proposed zipObj behavior, add coverage for object keys and value arrays, and consider missing-value handling; done means the input object produces the demonstrated array of keyed objects.

Written by the indexing model from the issue text.

Description

after modules enhancement

I didn't find any other requests similar to this, so forgive me if there has been one already.

Underscore supplies a method called zip, which is great. What I'm wanting is the ability to zip objects by their keys.

var before = {
  key1: ['val1', 'val2', 'val3'],
  key2: ['val4', 'val5', 'val6'],
  key3: ['val7', 'val8', 'val9']
};

var after = [
  {  key1: "val1",  key2: "val4",  key3: "val7"  },
  {  key1: "val2",  key2: "val5",  key3: "val8"  },
  {  key1: "val3",  key2: "val6",  key3: "val9"  }
]

I have something working for this, is there any interest in adding functionality like this to the repo? I can submit a PR if needed, just wanted to gauge interest before I start adding tests and getting my code styled correctly.

My first pass at implementation:

var zipObj = function( obj ) {
  var keys = Object.keys(obj);
  return _.zip.apply(_, keys.map(function(k, i) { return obj[k] || '' }))
  .map(function(d) { 
    var obj = {};

    keys.forEach(function(k, i) { obj[k] = d[i] });
    return obj;
  });
}
Dominant language
JavaScript
Stars
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Forks
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