I have a languages array. I need to insert my array data into Json Objeatc within a function.
I am a new student and I tried to do this using map. But it only inserts one data of array into a JSON object. But I need to insert all off array data one by one. But I don't know the way to that.IF anyone can help me with that it's really mean to me. Thank you.
This is how I need to be my JSON object:-
"displayNameLocalization": {
"en": "Fruits",
"fr": "des fruits",
"ja": "果物"
}
const data = {
displayNameLocalization : {},
};
const languages = ['En', 'Ta', 'Fr'];
function testFinalValue() {
displayNameLocalization.map((item) => {
data.displayName = item;
});
}
that's because you are overwritten the same variable in each loop of map, because there will be one element in data with name displayName , so in each loop you are affecting w new value to the same element that's why you input has just one value affected.
Can you afford an example of the input and the output that you want to get so I can help you with the code.
Related
I have a JSON data set as follows:
{
"content":[],
"layout":[],
"trail":[
{
"content":[
{
"type":"image",
"media":[
{
"type":"image/jpg",
"width":593,
"height":900,
"url":"https://live.staticflickr.com/65535/48208920877_e6b234d3ea_c_d.jpg",
"flickr":{
"flickr-post":"https://www.flickr.com/photos/riketrs/48208920877",
"flickr-album":"https://www.flickr.com/photos/riketrs/albums/72157709130951466"
}
}
]
},
{
"type":"image",
"media":[
{
"type":"image/jpg",
"width":1600,
"height":900,
"url":"https://live.staticflickr.com/2817/33807326532_91013ef6b1_h_d.jpg",
"flickr":{
"flickr-post":"https://www.flickr.com/photos/146758538#N03/33807326532",
"flickr-album":"https://www.flickr.com/photos/146758538#N03/albums/72157681438471236"
}
}
]
}
],
"colors":{
"c0":"#1e1e1d",
"c1":"#78736f",
"c2":"#b2a89f"
}
}
]
}
I would like to console.log the "url" key for each of the images shown here.
(https://live.staticflickr.com/65535/48208920877_e6b234d3ea_c_d.jpg and https://live.staticflickr.com/2817/33807326532_91013ef6b1_h_d.jpg)
I tried some code but I'm very new to JSON in general, I've looked at some other answers to do with JSON but I'm not quite sure how to achieve what I want.
JSFiddle: https://jsfiddle.net/fj6qveh1/1/
I appreciate all advice, including links to other answers that I potentially missed.
Thank you!
url is a property of an object. There can be many of these in a media array. (This data only shows one object per array.) media itself is an property of objects inside the content array.
Use map, and flatMap.
map to return the URL values from the objects in media, and flatMap to return a flat array of the nested arrays returned by map.
const data={content:[],layout:[],trail:[{content:[{type:"image",media:[{type:"image/jpg",width:593,height:900,url:"https://live.staticflickr.com/65535/48208920877_e6b234d3ea_c_d.jpg",flickr:{"flickr-post":"https://www.flickr.com/photos/riketrs/48208920877","flickr-album":"https://www.flickr.com/photos/riketrs/albums/72157709130951466"}}]},{type:"image",media:[{type:"image/jpg",width:1600,height:900,url:"https://live.staticflickr.com/2817/33807326532_91013ef6b1_h_d.jpg",flickr:{"flickr-post":"https://www.flickr.com/photos/146758538#N03/33807326532","flickr-album":"https://www.flickr.com/photos/146758538#N03/albums/72157681438471236"}},{type:"image/jpg",width:1600,height:900,url:"https://live.dummyimage.com/2817/dummy.jpg",flickr:{"flickr-post":"https://www.flickr.com/photos/146758538#N03/33807326532","flickr-album":"https://www.flickr.com/photos/146758538#N03/albums/72157681438471236"}}]}],colors:{c0:"#1e1e1d",c1:"#78736f",c2:"#b2a89f"}}]};
const content = data.trail[0].content;
const urls = content.flatMap(obj => {
return obj.media.map(inner => inner.url);
});
console.log(urls)
The easiest way is to use map function. Given that you are very new to programming (the solution has little to do with JSON itself, since the first step is to parse JSON string to a JavaScript object), it would be better if you try yourself. But you start with
let urls = trail["content"].map(x => x["media"][0]["url"])
for more about map function look here
There is a table in the table so for each table:
for(let i in trail){
var content = trail[i]["content"];
content.forEach(content => content.media.forEach(media => console.log(media.url)))
}
To access object properties, you can use a dot (.), and to access an array element, you use its index in square brackets ([]). So you just keep repeating these steps as necessary until you get to the content you're looking for.
Here's how that looks on a simplified version of your object, using the forEach method of arrays to apply a custom function to each item in the content array:
const json = getJson();
json.trail[0].content.forEach(item=>console.log(item.media[0].url));
function getJson(){
let obj = {
"trail": [{
"content": [
{ "media": [{ "url":"image #65535/48208920877_e6b234d3ea_c_d.jpg" }]},
{ "media": [{"url":"image #2817/33807326532_91013ef6b1_h_d.jpg"}]}
]
}]
};
return obj;
}
I have an HTML page that contains a stringified JSON object. The object has this structure:
{
"x":{
"key1":[],
"key2":{},
"keyN":{},
"myKey":{
"randomID238492":{
"items":[
{ "value":"zzzz" },
{ "value":"aaaa" },
{ ...}
]
}
}
}
}
I want to replace this object with one in which the "items" array has been sorted. Here is what I will and won't know about the object:
"myKey" and "items" will always be the relevant object keys
"myKey" will contain only one random ID, and the "items" key will always be its first child
I won't know the order of "myKey" in the object.
I won't know the true randomID under which "items" nests.
Is there a clear, efficient way to replace this JSON object with one in which "items" has been sorted? Right now, I do it by using this jQuery function after the page has rendered:
$(function() {
var myData = $( "#myJSON_string" )[0]; // <script> node that contains the string
var myDataJSON = JSON.parse(myData.innerText); // JSON string
var myKeyJSON = myDataJSON["x"]["myKey"]; // object
var myArr = myKeyJSON[Object.keys(myKeyJSON)[0]]["items"]; // array to sort
// Now sort and revise. I'm leaving myCompare() out of the example for brevity
myKeyJSON[Object.keys(myKeyJSON)[0]]["items"] = myArr.sort(myCompare);
myDataJSON["x"]["myKey"] = myKeyJSON;
myDataJSON = JSON.stringify(myDataJSON);
myData.innerText = myDataJSON;
});
This approach works, but it seems rather labored. It might be better, for example, if I could revise the JSON object "in place" without parsing it and then re-stringifying it.
Many SO posts, like this one, speak to the general question of how to sort a JSON array. But I can't see that any speak to the specific question posed here.
I'm retrieving an OSM Json from an overpass call, to obtain a list of features that I have to save on a database. Since the data are very different from one another (for example, some of them do have a a tag called "addr:city", and some of them not), I would like to check if a key exists, and only in that case save the corresponding value. I've found only this question but it's not my case, since I do not know a priori which keys one element will have and which not, and since I'm working with a great load of data, I really can't check the elements one by one and of course I can't write an IF for each case.
Is there a way to solve this? I was thinking something about "if key has null value, ignore it", while looping over the elements, but I don't know if something like that exists
EDIT:
This is my query:
https://overpass-api.de/api/interpreter?data=[out:json][timeout:25];(node[~%22^(tourism|historic)$%22~%22.%22](44.12419,%2012.21259,%2044.15727,%2012.27696);way[~%22^(tourism|historic)$%22~%22.%22](44.12419,%2012.21259,%2044.15727,%2012.27696););out%20center;
and this is the code I'm using to save the data on firebase:
results.elements.forEach(e=>{
var ref = firebase.database().ref('/point_of_interest/');
var key = firebase.database().ref().child('point_of_interest').push().key;
var updates = {};
var data = {
città: e.tags["addr:city"],
tipologia: e.tags["amenity"],
indirizzo: e.tags["addr:street"],
nome: e.tags["name"],
lat: e.lat,
lon: e.lon
}
updates['/point_of_interest/'+key] = data;
firebase.database().ref().update(updates);
})
"results" is the response in json format
You could use something like that:
var attrs = ["addr:city", "amenity", "addr:street", "name"];
var labels = ["città", "tipologia", "indirizzo", "nome"]
var data = { };
attrs.forEach((a, i) => {
if (e.tags[a]) { data[labels[i]] = e.tags[a]; }
});
You could even make this more dynamic, if you can query the attribute names and labels from somewhere.
I have a local JSON dataset (outlined below) and am trying to use the _.where method to retrieve specific values from within the dataset.
JSON File
"data": [{
"singles_ranking": [116],
"matches_lost": ["90"],
"singles_high_rank": [79],
"matches_won": ["170"],
"singles_ranking/_source": ["116"],
"year_matches_won": ["11"],
"name": ["Pfizenmaier Dinah"],
"gender": ["woman"],
"_resultNumber": 1,
},{etc},{etc}];
Currently I am trying to retrieve values from within the dataset like so:
var mappedPlayers = _.map(players,function(key,val){return key});
var filteredPlayers = _.where(mappedPlayers, {name:'Pfizenmaier Dinah'});
console.log(filteredPlayers);
This currently returns undefined. I am 90% sure that this is because the key values are stored within an array however, I am not sure how I can modify this _.where condition to actually make it return the text within the value attribute.
Any help would be greatly welcomed. Thank you for reading!
With ._where it is not possible, but you can use _.filter, like so
var where = {key: 'name', value: 'Pfizenmaier Dinah'};
var filteredPlayers = _.filter(players, function (el) {
// check if key exists in Object, check is value is Array, check if where.value exists in Array
return el[where.key] && _.isArray(el[where.key]) && _.indexOf(el[where.key], where.value) >= 0;
});
Example
I have a casperjs script which iterates over a list of pages and extracts data.
On the other hand I have a csv file with 2 fields 'ean' 'ref' which I parse with Papa.parse. The output is an object. I am looking for a solution to query an javascript object (the output from Papa.parse) for the 'ref' field and extract the 'ean'. I thought .filter() is what i was looking for but that can only search for a predefined value in the callback function.
function cd(element) {
return element == '123';
}
var b = c.filter(cd);
The problem hear is 1. It returns an empty array and 2. even if it would work I need to change the value with every call since I want to find the ean value for any given ref.
function cd(element,ref) {
return element == ref;
}
This is the data I need to search
"data": [
{
"ean": "654321",
"ref": "123"
},
{
"ean": "1234567",
"ref": "124"
}
]
I hope I made myself more clear. Thank you in advance
I used https://lodash.com/docs#where
Does exactly what i want
var a = _.where(array,{'ref' : 'value i am looking for'});
result is an array from where I can extract the value of the ean field.