Use underscore to replace object key from another object

Question

Using underscore, how can I replace each data.type key with its corresponding object from example.

For example, I have:

  var example = [
    {
      id: 1,
      data: {
        type: '/api/data/1/'
      }
    },
    {
      id: 2,
      data: {
        type: '/api/data/2/'
      }
    },
  ];

And this:

  var data = [
    {
      id: 1,
      uri: '/api/data/1/'
    },
    {
      id: 2,
      uri: '/api/data/2/'
    }
  ];

Would like to produce:

  var example = [
    {
      id: 1,
      data: {
        type: {
          id: 1,
          uri: '/api/data/1/'
        }
      }
    },
    {
      id: 2,
      data: {
        type: {
          id: 2,
          uri: '/api/data/2/'
        }
      }
    },
  ];

is this a hw problem?

U Avalos
– U Avalos

2015-08-04 22:43:04 +00:00
Commented Aug 4, 2015 at 22:43 — U Avalos
– U Avalos, Commented Aug 4, 2015 at 22:43

Sushanth -- · Accepted Answer · 2015-08-04 22:42:34Z

1

You can just use a for loop if the items are sequential.

for(var i=0;i< example.length; i++) {
    example[i].data.type = data[i];
}

console.log(example);

answered Aug 4, 2015 at 22:42

Sushanth --

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Comments

RobG · Accepted Answer · 2015-08-04 23:18:21Z

0

Libraries like underscore have largely been replaced by features in newer versions of ECMAScript. If you want to modify the original array (per Sushanth's answer), use ES5's forEach:

example.forEach(function(v, i) {
  example[i].data.type = data[i];
});

console.log(JSON.stringify(example));

answered Aug 4, 2015 at 23:18

RobG

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