Get value from another array based on ID

Hi – Firstly this is a great plugin. Thank you!

My json has an array called ‘feeds’ for example:

“feeds”: [
{
“uid”: 21,
“fsid”: 21,
“title”: “My Test Website”,
“url”: “www.mytestwebsite.com”,
“icon”: “”,
“type”: “RSS”,
“disableWebViewBanners”: 1
},
…. etc etc

I then have another array of feed items in the same json file called ‘feedItems’ where the fsid number is referenced for each story:

feedItems”: [
{
“fiid”: “453_160643”,
“fsid”: 21,
“date”: “2016-10-11 23:22:00”,
“text”: “Story goes here”,
“url”: “URL to story goes here”,
“images”: []
},
….. etc etc

I loop through the feedItems and the stories are all coming in, but how can I get the 21 from the fsid to output “My Test Website”? Is that possible? Thank you.