javascript - Filtering an array of objects by an object property within an object within the array -

i'm in nested hell of objects, here. feel there's answer this, can't quite figure out how phrase what's happening.

so, giant array of objects rest return (something 450+ objects) comes loaded this:

results[0] = {   prop0: "string",   prop1: "string",   prop2: bool,   prop3: object {       prop0: "string"   } prop4: "string"   } 

i'm doing thing, first, i'm creating array of objects contains unique strings out of nested object's property, along count of number of times string appears within data set.

i need, each unique string, create array of objects within original dataset results.prop3.prop0 matches string in collapsed array. confusing enough?

from this:

name: "joe",
place: state {
state: "new york",
},
alive: false
}

to this:

new york (120)
joe - dead

i've gotten far, using underscore.js:

for(index in collapsed){   var details = _.where(results,{state: {state: collapsed[index][0]}});  console.log(details);  } 

but i'm idiot somewhere, because that's returning empty array each thing in collapsed array.

sample of collapsed
[{"new york",120},{"georgia",79},{"another place",15}].

i want build table of data where, underneath each place, load in objects place matches state string way @ bottom of nested object.

to jm_____'s point, i'm going try that.

here examples of data manipulation underscore based on _.reduce() , _.filter()

getting collapsed array number of items grouped states

var collapsed = _.reduce(response, function(memo, item) {   if ( ! memo[item.place.state]) {     memo[item.place.state] = 0;   }   memo[item.place.state]++;   return memo; }, {}); 

result: grouped object states keys , count values.

{   london: 2,   new york: 4 } 

getting filtered data state

var filtered = _.filter(response, function(item) {   return item.place.state === "new york"; }); 

result: array of objects state new york

link jsbin demo