Utilizing lodash to extract arrays from objects within a larger array

_lodash

Here is the structure of my tickerTagObject array:

It consists of objects, with each containing another object along with an additional array

I have successfully extracted tickers using the following code snippet:

var tickerObjs = _(tickerTagObjs)
    .filter(function(tiks) { return tiks; })
    .pluck('ticker')
    .value();

console.log(tickerObjs);

^ This gives me an array of ticker objects

However, applying the same method to extract tags does not produce the desired result, possibly because tags are in an Array format rather than an Object?

var tagObjs = _(tickerTagObjs.tags)
    .filter(function(tags) { return tags; })
    .pluck('tags')
    .value();

console.log(tagObjs);

How can lodash be used to "pluck" the tag objects within the array of tags found inside each TagsObject?

Answer №1

In the second code snippet, the issue lies in passing the undefined tags property of an array directly to the lodash constructor, resulting in subsequent operations being ineffective.

It's worth noting that the filter calls in your examples are unnecessary and can be removed.

An alternative approach is to utilize the native Array method map:

You can achieve the same result with the following code:
var tags = tickerTagObjs.map(function(el) { return el.tags; });

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