After fighting with this for a couple of hours, I think I need to rephrase the question.
I have an object that contains and array of objects;
Playlist: [
{
"added_at": "2015-11-13T20:55:06Z",
"added_by": {
"external_urls": {
"spotify": "http://open.spotify.com/user/spotify_canada"
},
"href": "https://api.spotify.com/v1/users/spotify_canada",
"id": "spotify_canada",
"type": "user",
"uri": "spotify:user:spotify_canada"
},
"is_local": false,
"track": {
"album": {
"album_type": "album",
"available_markets": [
"CA",
"MX",
"US"
],
"external_urls": {
"spotify": "https://open.spotify.com/album/6Fr2rQkZ383FcMqFyT7yPr"
},
"href": "https://api.spotify.com/v1/albums/6Fr2rQkZ383FcMqFyT7yPr",
"id": "6Fr2rQkZ383FcMqFyT7yPr",
"images": [
{
"height": 640,
"url": "https://i.scdn.co/image/8b47495ce0c4a341f7196f70bcf4361e6257c1a0",
"width": 640
},
{
"height": 300,
"url": "https://i.scdn.co/image/da1e8958b6260e832660d0c5f3c80e9569c388c8",
"width": 300
},
{
"height": 64,
"url": "https://i.scdn.co/image/478dbfd0e579dee7392707b9a6848faff0cdfefd",
"width": 64
}
],
"name": "Purpose (Deluxe)",
"type": "album",
"uri": "spotify:album:6Fr2rQkZ383FcMqFyT7yPr"
},
"artists": [
{
"external_urls": {
"spotify": "https://open.spotify.com/artist/1uNFoZAHBGtllmzznpCI3s"
},
"href": "https://api.spotify.com/v1/artists/1uNFoZAHBGtllmzznpCI3s",
"id": "1uNFoZAHBGtllmzznpCI3s",
"name": "Justin Bieber",
"type": "artist",
"uri": "spotify:artist:1uNFoZAHBGtllmzznpCI3s"
}
],
"available_markets": [
"CA",
"MX",
"US"
],
"disc_number": 1,
"duration_ms": 205680,
"explicit": false,
"external_ids": {
"isrc": "USUM71511919"
},
"external_urls": {
"spotify": "https://open.spotify.com/track/4B0JvthVoAAuygILe3n4Bs"
},
"href": "https://api.spotify.com/v1/tracks/4B0JvthVoAAuygILe3n4Bs",
"id": "4B0JvthVoAAuygILe3n4Bs",
"name": "What Do You Mean?",
"popularity": 93,
"preview_url": "https://p.scdn.co/mp3-preview/13da79dc4803f65092d583f6e3bdf1fc4d8344e5",
"track_number": 3,
"type": "track",
"uri": "spotify:track:4B0JvthVoAAuygILe3n4Bs"
}
},
In side of each of these objects is another object I am trying to assign to scope.
So this - playlist {items [ {track {name: songname} } ] }
How do I go about assigning the track.name to scope?
Thanks!
I'm not sure if you just have a typo but why are you assigning your blank array to data.items instead of the other way around?
$scope.playListInfo = [];
$scope.getPlayList = function() {
Spotify.getPlaylistTracks('spotify_canada', '7ndCD5pklOTcrTcv4DErmI')
.then(function(data) {
var i = 0;
for(i; i < data.items.length; i++) {
var dataToKeep = {};
dataToKeep.name = data.items[i].track.name;
dataToKeep.artist = data.items[i].track.artist;
$scope.playListInfo[i] = dataToKeep;
}
});
};
Apparently, I don't have sufficient points to comment. So, I am creating this post.
The JSON data has items and not item. Also, I think you'd have to create a $scope.playlistTrack array outside the function.
$scope.playlistTrack = [];
$scope.getPlayList = function () {
Spotify.getPlaylistTracks('spotify_canada', '7ndCD5pklOTcrTcv4DErmI')
.then(function (datas) {
angular.forEach(datas, function(data){
data.items = $scope.playlistTrack;
});
});
};
Hope this answer helps.
Related
I have this object:
elements120: {
"data": {
"name": "120",
"type": "120"
},
"children": [
{
"data": {
"name": "120A",
"type": "120A"
},
"children": []
},
{
"data": {
"name": "120B",
"type": "120B"
},
"children": []
},
{
"data": {
"name": "120C",
"type": "120C"
},
"children": []
}
]
}
I need to make some new Json as these below:
Json 1:
filtered120A{
"data": {
"name": "120",
"type": "120"
},
"children": [
{
"data": {
"name": "120A",
"type": "120A"
},
"children": []
}
]
}
Json 2:
filtered120B{
"data": {
"name": "120",
"type": "120"
},
"children": [
{
"data": {
"name": "120B",
"type": "120B"
},
"children": []
}
]
}
Json 3:
filtered120C{
"data": {
"name": "120",
"type": "120"
},
"children": [
{
"data": {
"name": "120C",
"type": "120C"
},
"children": []
}
]
}
I tried to do this in order to get only the first children node and delete the others (it's the only way it works me). For 120B and 120C i put as first child the value of the node that I needed for each case
this.filtered120A = utils.deepClone(this.elements120);
this.filtered120B = utils.deepClone(this.elements120);
this.filtered120C = utils.deepClone(this.elements120);
this.filtered120A = this.filtered120A.filter((element) => {
delete element.children[1];
delete element.children[2];
return true;
});
this.filtered120B = this.filtered120B.filter((element) => {
element.children[0] = element.children[1];
delete element.children[1];
delete element.children[2];
return true;
});
this.filtered120C = this.filtered120C.filter((element) => {
element.children[0] = element.children[2];
delete element.children[1];
delete element.children[2];
return true;
});
It works, but the code is not very elegant. I would like to know if there is any other better alternative.
Here you go:
function getOutputs(input) {
const outputs = [];
for (const child of input.children) {
outputs.push({
"data": {
"name": input.data.name,
"type": input.data.type
},
"children": [child]
});
}
return outputs;
}
const inputs = {
"data": {
"name": "120",
"type": "120"
},
"children": [
{
"data": {
"name": "120A",
"type": "120A"
},
"children": []
},
{
"data": {
"name": "120B",
"type": "120B"
},
"children": []
},
{
"data": {
"name": "120C",
"type": "120C"
},
"children": []
}
]
};
const outputs = getOutputs(inputs);
console.log(outputs[0]); // output1
console.log(outputs[1]); // output2
console.log(outputs[2]); // output3
So here I have an object that I am trying to map:
var bakery = {
"items":
{
"item":[
{
"id": "0001",
"type": "donut",
"name": "Cake",
"ppu": 0.55,
"batters": {
"batter":[
{ "id": "1001", "type": "Regular" },
{ "id": "1002", "type": "Chocolate" },
{ "id": "1003", "type": "Blueberry" },
{ "id": "1004", "type": "Devil's Food" }
]
},
"topping":[
{ "id": "5001", "type": "None" },
{ "id": "5002", "type": "Glazed" },
{ "id": "5005", "type": "Sugar" },
{ "id": "5007", "type": "Powdered Sugar" },
{ "id": "5006", "type": "Chocolate with Sprinkles" },
{ "id": "5003", "type": "Chocolate" },
{ "id": "5004", "type": "Maple" }
]
},
...
...
...
]
}
}
This is the target outcome
var target = [{
"id": 1, //as an int
"type": "donut",
"name": "Cake",
"ppu": 0.55,
"batters": "all of the batter types as a string",
"ingredients": [],//a copy of all the toppings
"countOfFillings": 0
}];
And here is my mapping function
// creates variable bakeryArray that contains the actual Array inside of Baker var
var bakeryArray = bakery.items.item
// newCakes var invoked map function with the bakeryArray
var newCakes = bakeryArray.map(mapCakes)
function mapCakes(oldCakes) {
let batter = oldCakes.batters.batter
console.log(batter, "batter Logged")
var newCakesObject = {
type: oldCakes.type,
name: oldCakes.name,
ppu: oldCakes.ppu,
batters: batter.type,
ingredients: "ingridients",
countOfFillings: "total number of ingrediensts"
};
return newCakesObject;
};
I am running into problems in getting the Batter, Ingredients, and countOfFillings from the old object into the new one.
The only thing I can think of doing in order to get the batters in the newCakesObject is that I have to create another mapping function for the batter (I put my attempt at that below)? and then invoke that in the mapCakes function under batters? but every time I create another function for that I get an error saying that it's undefined once I call newBatterArray in the console
var newBatterArray = bakeryArray.map(mapBatters)
function mapBatters(oldarray) {
let theBatters = oldarray.batters.batter
console.log(theBatters.type, "we ran")
var newBatters = {
type: theBatters.type
}
return newBatters;
}
To have a much more clear interpretation of your bakery object I have tweaked it a bit
var bakery = {
"items":[
{
"id": "0001",
"type": "donut",
"name": "Cake",
"ppu": 0.55,
"batters":[
{ "id": "1001", "type": "Regular" },
{ "id": "1002", "type": "Chocolate" },
{ "id": "1003", "type": "Blueberry" },
{ "id": "1004", "type": "Devil's Food" }
],
"toppings":[
{ "id": "5001", "type": "None" },
{ "id": "5002", "type": "Glazed" },
{ "id": "5005", "type": "Sugar" },
{ "id": "5007", "type": "Powdered Sugar" },
{ "id": "5006", "type": "Chocolate with Sprinkles" },
{ "id": "5003", "type": "Chocolate" },
{ "id": "5004", "type": "Maple" }
]
},
{
"id": "0002",
"type": "donut",
"name": "Cake",
"ppu": 0.65,
"batters":[
{ "id": "1001", "type": "Regular1" },
{ "id": "1002", "type": "Chocolate1" },
{ "id": "1003", "type": "Blueberry1" },
{ "id": "1004", "type": "Devil's Food1" }
],
"toppings":[
{ "id": "5001", "type": "None1" },
{ "id": "5002", "type": "Glazed1" },
{ "id": "5005", "type": "Sugar1" },
{ "id": "5007", "type": "Powdered Sugar1" },
{ "id": "5006", "type": "Chocolate with Sprinkles1" },
{ "id": "5003", "type": "Chocolate1" },
{ "id": "5004", "type": "Maple1" }
]
},
...
...
...
...
]
}
Now You can iterate through each item and build your target array as follows
var target = [];
// define reducer function for each item in bakery.items
const reduceToTarget = item => {
var obj = {};
obj.id = item.id;
obj.type = item.type;
obj.name = item.name;
obj.ppu = item.ppu;
obj.batters = '';
item.batters.forEach(b => obj.batters+=b.type+'|');
obj.ingredients = item.toppings;
target.push(obj);
}
// Now you can call the reduceToTarget function to get the desired target list/array
bakery.items.forEach(reduceToTarget);
The output for this looks something like this
target = [
{
id: "0001"
type: "donut"
name: "Cake"
ppu: 0.55
batters: "Regular|Chocolate|Blueberry|Devil's Food|",
ingredients : [/* list of ingredients*/]
},
{
id: "0002"
type: "donut"
name: "Cake"
ppu: 0.65
batters: "Regular|Chocolate|Blueberry|Devil's Food|",
ingredients : [/* list of ingredients*/]
}
]
NOTE:
For getting the countOfFillings you can simply call length() function on your ingredients list for any element in target
I am trying to get dynamic data from the slot
As per documentation and my basic test I am sending directive from launch request as like :
{'version': '1.0', 'response': {'outputSpeech': {'type': 'SSML', 'ssml': '<speak> Hi, welcome to developement dynamic slot. <break time="800ms"/>Please tell me the product name you would be interested in</speak>'}, 'card': {'type': 'Simple', 'title': 'Choose a Medicine.', 'content': 'Pick a Medicine.'}, 'reprompt': {'outputSpeech': {'type': 'SSML', 'ssml': '<speak><break time="5s"/>I am HERE to help You, Please tell me the product and country names you would be interested in.</speak>'}}, 'shouldEndSession': False}, 'directives': [{'type': 'Dialog.UpdateDynamicEntities', 'updateBehavior': 'REPLACE', 'types': [{'name': 'products', 'values': [{'id': 'grnTea', 'name': {'value': 'green tea', 'synonyms': ['matcha']}}, {'id': 'oolTea', 'name': {'value': 'oolong', 'synonyms': ['chinese tea', 'black dragon tea']}}]}]}]}
and when I'm trying to get data which is not statically store in a slot but added in directive slot value.
returns following output :
{ "version": "1.0", "session": { "new": false, "sessionId": "amzn1.echo-api.session.671181ed-1e50-4e4c-b70e-4d854fe7cb78", "application": { "applicationId": "amzn1.ask.skill.c35cd12c-6845-473e-be58-9b1139ee0adb" }, "user": { "userId": "amzn1.ask.account.sadasdsa", "permissions": { "consentToken": "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6IjEifQ..XyWgyUIjDzzlZ12CR0lbZid6GxwZZYBgarlV-9difbkFjOTxrcvS9lJYWo-Db3wo-fIdXb_jZkCAJBtYPggqnJhLyyC-EDa0_u9aARKthF1_nkbLh5zDOHDb8MyyOYro4BJlqm4XBNd1qyeQUV2M4fdca1YSEnbEun_6kWOKeFRS-14zcwMj5E-MHcBbeDX799A_kay82kS8VGeMhSUsXPTZFrwOKHcFweJTqXFNOkBxME8kAFfS1JB5MNbA3TujVIsIgTBSNQaJeHRksConKt0u06ATrjffzFkcmbxDT5HoJH4NqDgS0y_GdtaeXQM3LJ-MN0-_DMX2QVEaL6kUUw" } } }, "context": { "System": { "application": { "applicationId": "amzn1.ask.skill.c35cd12c-6845-473e-be58-9b1139ee0adb" }, "user": { "userId": "amzn1.ask.account.aasdasdasdasdas", "permissions": { "consentToken": "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6IjEifQ.asdjaskdhas.XyWgyUIjDzzlZ12CR0lbZid6GxwZZYBgarlV-9difbkFjOTxrcvS9lJYWo-Db3wo-fIdXb_jZkCAJBtYPggqnJhLyyC-EDa0_u9aARKthF1_nkbLh5zDOHDb8MyyOYro4BJlqm4XBNd1qyeQUV2M4fdca1YSEnbEun_6kWOKeFRS-14zcwMj5E-MHcBbeDX799A_kay82kS8VGeMhSUsXPTZFrwOKHcFweJTqXFNOkBxME8kAFfS1JB5MNbA3TujVIsIgTBSNQaJeHRksConKt0u06ATrjffzFkcmbxDT5HoJH4NqDgS0y_GdtaeXQM3LJ-MN0-_DMX2QVEaL6kUUw" } }, "device": { "deviceId": "amzn1.ask.device.ajshdjkhasjkhdkjsahkasdhjasd", "supportedInterfaces": {} }, "apiEndpoint": "https://api.eu.amazonalexa.com", "apiAccessToken": "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6IjEifQ.asdhjashjdhajsd.RQhzWmnhN9K_dCbsFXBPPoLVzuwe5BWjAruwJNF1pVr11PiygVgQ64W3CNng2sK1thT2tl6r3GuRtG-1133Aw1KPWtMuHElu7CTrFfgAqW8blpK37PJIvPMOUGBw1rbrgCTMdy8Ua7qSFV_Y_wlOJaV3-apDGBqhQKE_-dE-ntWYZuIySlY3l8hBs_66eELS-LiL5DEDJk1hfvC2C6ZFB7A7P8mx4Hb71km-lYaElJS0-FDP0C-LdSp6dCbzV23W4JehtTGL4kJ1JEQgWyuNAAkt_HmPcEYlPp8T5RFceDuVuz-ZZBFyiVKuAN8VmxyFsmnC3SXi4yb3RKm1SCcorg" }, "Viewport": { "experiences": [ { "arcMinuteWidth": 246, "arcMinuteHeight": 144, "canRotate": false, "canResize": false } ], "shape": "RECTANGLE", "pixelWidth": 1024, "pixelHeight": 600, "dpi": 160, "currentPixelWidth": 1024, "currentPixelHeight": 600, "touch": [ "SINGLE" ], "video": { "codecs": [ "H_264_42", "H_264_41" ] } }, "Viewports": [ { "type": "APL", "id": "main", "shape": "RECTANGLE", "dpi": 160, "presentationType": "STANDARD", "canRotate": false, "configuration": { "current": { "video": { "codecs": [ "H_264_42", "H_264_41" ] }, "size": { "type": "DISCRETE", "pixelWidth": 1024, "pixelHeight": 600 } } } } ] }, "request": { "type": "IntentRequest", "requestId": "amzn1.echo-api.request.0f3b51f1-880b-483f-8410-3210e81e5b59", "timestamp": "2020-01-01T11:48:09Z", "locale": "en-IN", "intent": { "name": "productcheck", "confirmationStatus": "NONE", "slots": { "products": { "name": "products", "value": "green tea", "resolutions": { "resolutionsPerAuthority": [ { "authority": "amzn1.er-authority.echo-sdk.amzn1.ask.skill.c35cd12c-6845-473e-be58-9b1139ee0adb.products", "status": { "code": "ER_SUCCESS_NO_MATCH" } } ] }, "confirmationStatus": "NONE", "source": "USER" } } } } }
It's not added resolutions resolutionsPerAuthority's second(dynamic) element in the list.
anybody can help me out from this problem?
I tested your added directive exactly as pasted and the dynamic entity resolved as expected:
"slots": {
"products": {
"name": "products",
"value": "matcha",
"resolutions": {
"resolutionsPerAuthority": [
{
"authority": "amzn1.er-authority.echo-sdk.amzn1.ask.skill.****.products",
"status": {
"code": "ER_SUCCESS_NO_MATCH"
}
},
{
"authority": "amzn1.er-authority.echo-sdk.dynamic.amzn1.ask.skill.****.products",
"status": {
"code": "ER_SUCCESS_MATCH"
},
"values": [
{
"value": {
"name": "green tea",
"id": "grnTea"
}
}
]
}
]
},
"confirmationStatus": "NONE",
"source": "USER"
}
}
Could you share your skill's interaction model to investigate further?
I'm assigned a task to get data using underscore js.
This is my JSON :
$scope.myData= {
"buslist":
{
"code":"1",
"message":"Success",
"fromStationCode":"71",
"searchResult": [
{
"arrivalTime": "17:00:00",
"availableSeats": "42",
"boardingPointDetails": [
{
"code": "1631",
"name": "Koyambedu",
"time": "09:30:00"
},
{
"code": "961296",
"name": "Nerkundram",
"time": "09:45:00"
}
]
},
{
"arrivalTime": "18:00:00",
"availableSeats": "32",
"boardingPointDetails": [
{
"code": "2084",
"name": "Adyar",
"time": "09:30:00"
},
{
"code": "961296",
"name": "Madurai",
"time": "09:45:00"
}
]
}
]
}
}
From this I want only "name" field. By doing this :
$scope.bdata = _.pluck($scope.myTest.buslist.searchResult, 'boardingPointDetails');
I got all "boardingPointDetails". The result looks like:
[ [
{
"code": "2084",
"name": "Adyar",
"time": "09:30:00"
},
{
"code": "961296",
"name": "Madurai",
"time": "09:45:00"
}
],[
{
"code": "1631",
"name": "Koyambedu",
"time": "09:30:00"
},
{
"code": "961296",
"name": "Nerkundram",
"time": "09:45:00"
}
],[
{
...
}
]
...
]
Help me to retrieve only "name" from this.
If you just want array of names like ['Koyambedu', 'Madurai'] then below code would work.
$scope.bdata = _.pluck($scope.myTest.buslist.searchResult, 'boardingPointDetails');
// Flatten the data.
$scope.flatbdata = _.flatten($scope.bdata, true);
$scope.flatbdata = $scope.flatbdata.filter(function(d){
return d != undefined && d.hasOwnProperty('name')
})
// map calls a provided callback function once for each element in an array, in order, and constructs a new array from the results
$scope.names = $scope.flatbdata.map(function(d){
return d.name;
});
Refer below links :
http://underscorejs.org/#flatten
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map
If you just want the array of names, here it is:
$scope.bdata = _.pluck($scope.myTest.buslist.searchResult, 'boardingPointDetails');
var res= _.flatten($scope.bdata);
res=_.pluck(res,'name');
console.log(res);
var temp = _.pluck(_.flatten($scope.bdata),'name')
temp will have ["Koyambedu", "Nerkundram", "Adyar", "Madurai"]
Try this.
$scope = {}; // in real project you don't need this. it's just for snippet.
$scope.myData = {
"buslist": {
"code": "1",
"message": "Success",
"fromStationCode": "71",
"searchResult": [{
"arrivalTime": "17:00:00",
"availableSeats": "42",
"boardingPointDetails": [{
"code": "1631",
"name": "Koyambedu",
"time": "09:30:00"
}, {
"code": "961296",
"name": "Nerkundram",
"time": "09:45:00"
}]
}, {
"arrivalTime": "18:00:00",
"availableSeats": "32",
"boardingPointDetails": [{
"code": "2084",
"name": "Adyar",
"time": "09:30:00"
}, {
"code": "961296",
"name": "Madurai",
"time": "09:45:00"
}]
}]
}
};
$scope.names = _.chain($scope.myData.buslist.searchResult).pluck("boardingPointDetails").flatten(true).map(function(item) {
return item.name;
}).value();
console.log($scope.names);
<script src="http://underscorejs.ru/underscore-min.js"></script>
I have the following collection:
"items": [{
"id": 1,
"title": "Montrachet",
"imageUrl": "http://winebuff.com.hk/products_image/3376-Ramonet-ChassagneMontrachetBlanc.jpg",
"imageUrls": [
"http://winebuff.com.hk/products_image/3376-Ramonet-ChassagneMontrachetBlanc.jpg",
"http://media.riepenau.com/wines/17973_b.jpg",
"http://lorempixel.com/400/400/food/3"
],
"properties": [
{"description" : "Kırmızı Şaraplar Desc"},
{"region" :"Bordeaux"},
{"age": "16"},
{"producer" :"Kayra"},
{"grapeType":"Espadeiro"}
],
"priceGlass": "1",
"priceBottle": "2",
"year": "1999"
},
{
"id": 2,
"title": "Montrachet2",
"imageUrl": "http://winebuff.com.hk/products_image/3376-Ramonet-ChassagneMontrachetBlanc.jpg",
"imageUrls": [
"http://winebuff.com.hk/products_image/3376-Ramonet-ChassagneMontrachetBlanc.jpg",
"http://media.riepenau.com/wines/17973_b.jpg",
"http://lorempixel.com/400/400/food/3"
],
"properties": [
{"description" : "Kırmızı Şaraplar Desc"},
{"region" :"Bordeaux"},
{"age": "16"},
{"producer" :"Kayra"},
{"grapeType":"Chardonnay"}
],
"priceGlass": "1",
"priceBottle": "2",
"year": "1999",
}
]
I want to grab unique grapeTypes from that collection. The returning array shold be ["Chardonnay","Espadeiro"]
What is the best way to do it with lodash?
I think this combination of pluck, map and filter should do it:
var result = _.chain(obj.items).pluck('properties').map(function(obj) {
return _.filter(obj, function(prop) {
return prop.grapeType;
})[0].grapeType;
}).uniq().value();
console.log(result);
Check the demo run below.
// Code goes here
var obj = {
items: [{
"id": 1,
"title": "Montrachet",
"imageUrl": "http://winebuff.com.hk/products_image/3376-Ramonet-ChassagneMontrachetBlanc.jpg",
"imageUrls": [
"http://winebuff.com.hk/products_image/3376-Ramonet-ChassagneMontrachetBlanc.jpg",
"http://media.riepenau.com/wines/17973_b.jpg",
"http://lorempixel.com/400/400/food/3"
],
"properties": [{
"description": "Kırmızı Şaraplar Desc"
}, {
"region": "Bordeaux"
}, {
"age": "16"
}, {
"producer": "Kayra"
}, {
"grapeType": "Espadeiro"
}
],
"priceGlass": "1",
"priceBottle": "2",
"year": "1999"
},
{
"id": 2,
"title": "Montrachet2",
"imageUrl": "http://winebuff.com.hk/products_image/3376-Ramonet-ChassagneMontrachetBlanc.jpg",
"imageUrls": [
"http://winebuff.com.hk/products_image/3376-Ramonet-ChassagneMontrachetBlanc.jpg",
"http://media.riepenau.com/wines/17973_b.jpg",
"http://lorempixel.com/400/400/food/3"
],
"properties": [{
"description": "Kırmızı Şaraplar Desc"
}, {
"region": "Bordeaux"
}, {
"age": "16"
}, {
"producer": "Kayra"
}, {
"grapeType": "Chardonnay"
}
],
"priceGlass": "1",
"priceBottle": "2",
"year": "1999",
}
]
};
var result = _.chain(obj.items).pluck('properties').map(function(obj) {
return _.filter(obj, function(prop) {
return prop.grapeType;
})[0].grapeType;
}).uniq().value();
document.write(JSON.stringify(result));
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/3.8.0/lodash.js"></script>
UPD. If grapeType can be missing from properties then the script should be
var result = _.chain(obj.items).pluck('properties').map(function(obj) {
return (_.filter(obj, function(prop) {
return prop.grapeType;
})[0] || {}).grapeType;
}).compact().uniq().value();
Here's one way to do it with lodash:
_(items)
.pluck('properties')
.map(function(item) {
return _.find(item, _.ary(_.partialRight(_.has, 'grapeType'), 1));
})
.pluck('grapeType')
.uniq()
.value();
First, you get the properties arrays using pluck(). Next, you use find() to get the first object in this array that has a grapeType property. This is done using has(), and partially-applying the argument to build the callback function.
Next, you use pluck() again to get the actual property values. Finally, uniq() ensures there are no duplicates.