I cannot seem to grasp how to use an array of values to filter an object. I am unfamiliar with terms/syntax to get this working. I thought I would need .filter => function but no success. Hopefully the following dummy code can allow someone to see what I am trying to do - thanks

// Javascript array object
var str = "Organization A,Organization B,Organization X,Organization R,Organization P"
var arr = new Array(); 
arr = str.split(","); 

// object     
json=[
{"organization":"Organization A","host":"Computer 001"},
{"organization":"Organization B","host":"Computer 002"},
{"organization":"Organization C","host":"Computer 003"},
{"organization":"Organization A","host":"Computer 004"},
{"organization":"Organization D","host":"Computer 005"}
]

// result needed is to return the structure above that has organization(s) in arr 
// below is simple example for 1 successful test but need to get filter all in arr
// .map? .find? 
res = json.filter(f => f.organization==="Organization A")