javascript - Given an array of JSON objects, how can I get JSON object X based on a nested value? -
i using google maps geocoding api following json object, based on address:
{ "results":[ { "address_components":[ { "long_name":"643", "short_name":"643", "types":[ "subpremise" ] }, { "long_name":"900", "short_name":"900", "types":[ "street_number" ] }, { "long_name":"folsom street", "short_name":"folsom st", "types":[ "route" ] }, { "long_name":"south of market", "short_name":"south of market", "types":[ "neighborhood", "political" ] }, { "long_name":"san francisco", "short_name":"sf", "types":[ "locality", "political" ] }, { "long_name":"san francisco county", "short_name":"san francisco county", "types":[ "administrative_area_level_2", "political" ] }, { "long_name":"california", "short_name":"ca", "types":[ "administrative_area_level_1", "political" ] }, { "long_name":"united states", "short_name":"us", "types":[ "country", "political" ] }, { "long_name":"94107", "short_name":"94107", "types":[ "postal_code" ] }, { "long_name":"1007", "short_name":"1007", "types":[ "postal_code_suffix" ] } ] } ] } question
how can long_name , short_name of object in address_components array based on particular type?
example
i want long_name and short_name of objects have "locality" in types array.
context
i'm using information build "apartment finder" application using node.js, express, , mongodb.
considerations
i've read underscore library this.
edit: thoughts
so, have idea how search through address_components array. (i can access results[0]), , believe can access types array dot notation, want search through types arrays of each object , return when find object with, let's say, types containing 'location'. how can this?
i'm not experienced parsing/looping json. learning. appreciated. thank you!
you can use nested .filter objects containing that, combined .map create array of matching objects:
var objectscontainingconditions = data.results[0].address_components.filter(function(item) { return item.types.filter(function(addresstype) { return addresstype == "locality"; }).length > 0; }).map(function(item) { return { long: item.long_name, short: item.short_name } }); put function , pass type if want reuse it:
function querygooglecomponentsbytype(type, components) { return components.filter(function(item) { return item.types.filter(function(addresstype) { return addresstype == type; }).length > 0; }).map(function(item) { return { long: item.long_name, short: item.short_name } }); } var results = querygooglecomponentsbytype("locality", data.results[0].address_components);
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