I'm very new to Javascript and have been given a task. I have a JSON feed that has been given as follows:
var data = {
"feeds": {
"regions": [{
"name": "Lichtenberg",
"id": "01408.b",
"suburbs": [{
"name": "Fennpfuhl",
"views": 76400
},
{
"name": "Lichtenberg",
"views": 87895
},
{
"name": "Rummelsberg",
"views": 10239
}
]
},
{
"name": "Mitte",
"id": "03442.f",
"suburbs": [{
"name": "Tiergarten",
"views": 82695
},
{
"name": "Mitte",
"views": 67234
},
{
"name": "Hansaviertel",
"views": 10848
},
{
"name": "Moabit",
"views": 67500
}
]
},
{
"name": "Friedrichshain-Kreuzberg",
"id": "01991.o",
"suburbs": [{
"name": "Friedrichshain",
"views": "98494"
},
{
"name": "Kreuzberg",
"views": "27800"
}
]
},
{
"name": "Templehof-Schöneberg",
"id": "01778.k",
"suburbs": [{
"name": "Friedenau",
"views": 76595
},
{
"name": "Schöneberg",
"views": 20731
},
{
"name": "Templehof",
"views": 58000
},
{
"name": "Mariendorf",
"views": 32300
}
]
},
{
"name": "Pankow",
"id": "02761.q",
"suburbs": [{
"name": "Wießensee",
"views": 81294
},
{
"name": "Prenzlauer Berg",
"views": 76470
},
{
"name": "Pankow",
"views": 90210
}
]
}
],
"branding": [{
"municipality_id": "01408.b",
"brand_color": "#f9cd90"
}, {
"municipality_id": "03442.f",
"brand_color": "#F28123"
}, {
"municipality_id": "01991.o",
"brand_color": "#D34E24"
}, {
"municipality_id": "01778.k",
"brand_color": "#563F1B"
}, {
"municipality_id": "02761.q",
"brand_color": "#38726C"
}],
"customer": {
"name": "Viktoria Tiedemann",
"date_of_birth": "1981-09-19",
"address": {
"street": "Schönfließer Str 9",
"suburb": "Prenzlauer Berg",
"postcode": "10439"
}
}
}
};
The task is simple - to find the suburb and the region of Viktoria Tiedemann. So far I've tried using the below:
var customer_suburb;
var customer_name = 'Viktoria Tiedemann';
for (var i = 0; i < data.feeds.customer.length; i++){
if (data.feeds.customer.name[i] == customer_name){
customer_suburb = data.feeds.customer.address.suburb;
}
}
but it keeps on returning undefined values - where am I going wrong? I'm thinking to use the same process to get the region.
In your data, you have just one customer — not an array of customers — which is accessible with:
data.feeds.customer
( if customer was supposed to be an array, you could find Viktoria with : let customer = data.feeds.customer.find(c => c.name === 'Viktoria Tiedemann') )
You can get the suburb with:
let suburb = data.feeds.customer.address.suburb
Once you have that, you just need to find() the region whose suburbs array has this. For that find() combined with some() does this succinctly:
var data = {"feeds": {"regions": [{"name": "Lichtenberg","id": "01408.b","suburbs": [{ "name": "Fennpfuhl", "views": 76400 },{ "name": "Lichtenberg", "views": 87895 },{ "name": "Rummelsberg", "views": 10239 }]},{"name": "Mitte","id": "03442.f","suburbs": [{ "name": "Tiergarten", "views": 82695 },{ "name": "Mitte", "views": 67234 },{ "name": "Hansaviertel", "views": 10848 },{ "name": "Moabit", "views": 67500 }]},{"name": "Friedrichshain-Kreuzberg","id": "01991.o","suburbs": [{ "name": "Friedrichshain", "views": "98494" },{ "name": "Kreuzberg", "views": "27800" }]},{"name": "Templehof-Schöneberg","id": "01778.k", "suburbs": [{ "name": "Friedenau", "views": 76595 },{ "name": "Schöneberg", "views": 20731 },{ "name": "Templehof", "views": 58000 },{ "name": "Mariendorf", "views": 32300 }]},{"name": "Pankow","id": "02761.q","suburbs": [{ "name": "Wießensee", "views": 81294 },{ "name": "Prenzlauer Berg", "views": 76470 },{ "name": "Pankow", "views": 90210 }]}],"branding": [{"municipality_id": "01408.b","brand_color": "#f9cd90"},{"municipality_id": "03442.f","brand_color": "#F28123"},{"municipality_id": "01991.o","brand_color": "#D34E24"},{"municipality_id": "01778.k","brand_color": "#563F1B"},{"municipality_id": "02761.q","brand_color": "#38726C"}],"customer": {"name": "Viktoria Tiedemann","date_of_birth": "1981-09-19","address": {"street": "Schönfließer Str 9","suburb": "Prenzlauer Berg","postcode": "10439"}}}};
let suburb = data.feeds.customer.address.suburb
let region = data.feeds.regions.find(region => region.suburbs.some(s => s.name === suburb))
console.log("suburb:", suburb, "region:", region.name)
Related
I am trying to learn javascript reduce and map an I came across some difficulties.
I have an array with the following format. The id of the parent is same as the location_id of the child. I need to group the array into a nested format.
arr = [
{
"id": 4583211,
"name": "Location 1",
"location_id": null,
},
{
"id": 7458894,
"name": "Location 12",
"location_id": 4583211
},
{
"id": 7463953,
"name": "Location 13",
"location_id": 4583211
},
{
"id": 80302210,
"name": "Location 121",
"location_id": 7458894
},
{
"id": 80302219,
"name": "Location 122",
"location_id": 7458894
},
{
"id": 7464314,
"name": "Location 131",
"location_id": 7463953
},
{
"id": 4583216,
"name": "Location 2",
"location_id": null,
},
{
"id": 3566353,
"name": "Location 21",
"location_id": 4583216
},
]
This array should be grouped as:
result = [
{
"id": 4583211,
"name": "Location 1",
"locations": [
{
"id": 7458894,
"name": "Location 12",
"locations": [
{
"id": 80302210,
"name": "Location 121"
},
{
"id": 80302219,
"name": "Location 122"
}
]
},
{
"id": 7463953,
"name": "Location 13",
"locations": [
{
"id": 7464314,
"name": "Location 131"
}
]
}
]
},
{
"id": 4583216,
"name": "Location 2",
"locations": [
{
"id": 3566353,
"name": "Location 21"
}
]
}
]
I tried to group it using the following method found on SO but it gives different result.
result = arr.reduce(function (r, a) {
r[a.location_id] = r[a.location_id] || [];
r[a.location_id].push(a);
return r;
}, Object.create(null));
You could do this using reduce and recursion you just need to check if parent is equal to current elements location_id.
const data = [{"id":4583211,"name":"Location 1","location_id":null},{"id":7458894,"name":"Location 12","location_id":4583211},{"id":7463953,"name":"Location 13","location_id":4583211},{"id":80302210,"name":"Location 121","location_id":7458894},{"id":80302219,"name":"Location 122","location_id":7458894},{"id":7464314,"name":"Location 131","location_id":7463953},{"id":4583216,"name":"Location 2","location_id":null},{"id":3566353,"name":"Location 21","location_id":4583216}]
function create(data, parent = null) {
return data.reduce((r, e) => {
if(parent == e.location_id) {
const o = { id: e.id, name: e.name }
const children = create(data, e.id);
if(children.length) o.locations = children;
r.push(o)
}
return r
}, [])
}
console.log(create(data))
Currently I've got the following JSON feed:
var data = {
"feeds": {
"regions": [{
"name": "Lichtenberg",
"id": "01408.b",
"suburbs": [{
"name": "Fennpfuhl",
"views": 76400
},
{
"name": "Lichtenberg",
"views": 87895
},
{
"name": "Rummelsberg",
"views": 10239
}
]
},
{
"name": "Mitte",
"id": "03442.f",
"suburbs": [{
"name": "Tiergarten",
"views": 82695
},
{
"name": "Mitte",
"views": 67234
},
{
"name": "Hansaviertel",
"views": 10848
},
{
"name": "Moabit",
"views": 67500
}
]
},
{
"name": "Friedrichshain-Kreuzberg",
"id": "01991.o",
"suburbs": [{
"name": "Friedrichshain",
"views": "98494"
},
{
"name": "Kreuzberg",
"views": "27800"
}
]
},
{
"name": "Templehof-Schöneberg",
"id": "01778.k",
"suburbs": [{
"name": "Friedenau",
"views": 76595
},
{
"name": "Schöneberg",
"views": 20731
},
{
"name": "Templehof",
"views": 58000
},
{
"name": "Mariendorf",
"views": 32300
}
]
},
{
"name": "Pankow",
"id": "02761.q",
"suburbs": [{
"name": "Wießensee",
"views": 81294
},
{
"name": "Prenzlauer Berg",
"views": 76470
},
{
"name": "Pankow",
"views": 90210
}
]
}
],
}
};
Effectively I want to do two things:
Loop through the Regions to get the 4 names
Loop through all the views in each region, sum them up, and return them as values under the 4 names.
Here's a sample of the output that I just quickly typed up:
var viewsPerRegion =
[{
label: "Litchtenberg",
total: 174534
}, {
label: "Mitte",
total: 228277
}, {
label: "Friedrichshain-Kreuzberg",
total: 126294
}, {
label: "Templehof-Schöneberg",
total: 187626
}];
etc...
I do want to note that data.feeds.region[2].suburbs.views is stored as a string, so that's something I'll need to change into an integer first.
Anyway the solution I have so far (which doesn't really work) is as follows:
var viewsPerRegion, i, j, x;
for (i in data.feeds.regions) {
x += data.feeds.regions[i].name;
for (j in data.feeds.regions[i].suburbs.views){
x += data.feeds.regions[i].suburbs.views[j];
}
}
viewsPerRegion = x;
Any help is certainly appreciated - bit of a newbie in JSON and javascript.
You can map the regions array, extracting the name from each, and get the total by using reduce to add up each of the views:
const data={"feeds":{"regions":[{"name":"Lichtenberg","id":"01408.b","suburbs":[{"name":"Fennpfuhl","views":76400},{"name":"Lichtenberg","views":87895},{"name":"Rummelsberg","views":10239}]},{"name":"Mitte","id":"03442.f","suburbs":[{"name":"Tiergarten","views":82695},{"name":"Mitte","views":67234},{"name":"Hansaviertel","views":10848},{"name":"Moabit","views":67500}]},{"name":"Friedrichshain-Kreuzberg","id":"01991.o","suburbs":[{"name":"Friedrichshain","views":"98494"},{"name":"Kreuzberg","views":"27800"}]},{"name":"Templehof-Schöneberg","id":"01778.k","suburbs":[{"name":"Friedenau","views":76595},{"name":"Schöneberg","views":20731},{"name":"Templehof","views":58000},{"name":"Mariendorf","views":32300}]},{"name":"Pankow","id":"02761.q","suburbs":[{"name":"Wießensee","views":81294},{"name":"Prenzlauer Berg","views":76470},{"name":"Pankow","views":90210}]}],}}
const viewsPerRegion = data.feeds.regions.map(({ name, suburbs }) => ({
label: name,
total: suburbs.reduce((a, { views }) => a + Number(views), 0)
}));
console.log(viewsPerRegion);
{
"name": "English Premier League 2015/16",
"rounds": [
{
"name": "Play-Off um 1 Premierleague-Platz:",
"matches": [
{
"date": "2015-08-08",
"team1": {
"key": "manutd",
"name": "Manchester United",
"code": "MUN"
},
"team2": {
"key": "tottenham",
"name": "Tottenham Hotspur",
"code": "TOT"
},
"score1": 1,
"score2": 0
},
{
"date": "2015-08-08",
"team1": {
"key": "bournemouth",
"name": "Bournemouth",
"code": "BOU"
},
"team2": {
"key": "astonvilla",
"name": "Aston Villa",
"code": "AVL"
},
"score1": 0,
"score2": 1
},
{
"date": "2015-08-08",
"team1": {
"key": "everton",
"name": "Everton",
"code": "EVE"
},
"team2": {
"key": "watford",
"name": "Watford",
"code": "WAT"
},
"score1": 2,
"score2": 2
},
{
"date": "2015-08-08",
"team1": {
"key": "leicester",
"name": "Leicester City",
"code": "LEI"
},
"team2": {
"key": "sunderland",
"name": "Sunderland",
"code": "SUN"
},
"score1": 4,
"score2": 2
},
{
"date": "2015-08-08",
"team1": {
"key": "norwich",
"name": "Norwich",
"code": "NOR"
},
"team2": {
"key": "crystalpalace",
"name": "Crystal Palace",
"code": "CRY"
},
"score1": 1,
"score2": 3
},
{
"date": "2015-08-08",
"team1": {
"key": "chelsea",
"name": "Chelsea",
"code": "CHE"
},
"team2": {
"key": "swansea",
"name": "Swansea",
"code": "SWA"
},
"score1": 2,
"score2": 2
},
{
"date": "2015-08-09",
"team1": {
"key": "arsenal",
"name": "Arsenal",
"code": "ARS"
},
"team2": {
"key": "westham",
"name": "West Ham United",
"code": "WHU"
},
"score1": 0,
"score2": 2
},
{
"date": "2015-08-09",
"team1": {
"key": "newcastle",
"name": "Newcastle United",
"code": "NEW"
},
"team2": {
"key": "southampton",
"name": "Southampton",
"code": "SOU"
},
"score1": 2,
"score2": 2
},
{
"date": "2015-08-09",
"team1": {
"key": "stoke",
"name": "Stoke City",
"code": "STK"
},
"team2": {
"key": "liverpool",
"name": "Liverpool",
"code": "LIV"
},
"score1": 0,
"score2": 1
},
{
"date": "2015-08-10",
"team1": {
"key": "westbrom",
"name": "West Bromwich Albion",
"code": "WBA"
},
"team2": {
"key": "mancity",
"name": "Manchester City",
"code": "MCI"
},
"score1": 0,
"score2": 3
}
]
}
]
}
I want to log all the matches which are inside matches array . But i can't seem to access them because there are objects ,arrays ,more arrays and more objects nested inside one another. Kinda confused.please help explaining how to access elements in such situation. Which loops to use, what to do in case of looping through objects and so on. Hope I have explained my problem quite elaborately.
You can try this this code here:
const data = {"name":"English Premier League 2015/16","rounds":[{"name":"Play-Off um 1 Premierleague-Platz:","matches":[{"date":"2015-08-08","team1":{"key":"manutd","name":"Manchester United","code":"MUN"},"team2":{"key":"tottenham","name":"Tottenham Hotspur","code":"TOT"},"score1":1,"score2":0},{"date":"2015-08-08","team1":{"key":"bournemouth","name":"Bournemouth","code":"BOU"},"team2":{"key":"astonvilla","name":"Aston Villa","code":"AVL"},"score1":0,"score2":1},{"date":"2015-08-08","team1":{"key":"everton","name":"Everton","code":"EVE"},"team2":{"key":"watford","name":"Watford","code":"WAT"},"score1":2,"score2":2},{"date":"2015-08-08","team1":{"key":"leicester","name":"Leicester City","code":"LEI"},"team2":{"key":"sunderland","name":"Sunderland","code":"SUN"},"score1":4,"score2":2},{"date":"2015-08-08","team1":{"key":"norwich","name":"Norwich","code":"NOR"},"team2":{"key":"crystalpalace","name":"Crystal Palace","code":"CRY"},"score1":1,"score2":3},{"date":"2015-08-08","team1":{"key":"chelsea","name":"Chelsea","code":"CHE"},"team2":{"key":"swansea","name":"Swansea","code":"SWA"},"score1":2,"score2":2},{"date":"2015-08-09","team1":{"key":"arsenal","name":"Arsenal","code":"ARS"},"team2":{"key":"westham","name":"West Ham United","code":"WHU"},"score1":0,"score2":2},{"date":"2015-08-09","team1":{"key":"newcastle","name":"Newcastle United","code":"NEW"},"team2":{"key":"southampton","name":"Southampton","code":"SOU"},"score1":2,"score2":2},{"date":"2015-08-09","team1":{"key":"stoke","name":"Stoke City","code":"STK"},"team2":{"key":"liverpool","name":"Liverpool","code":"LIV"},"score1":0,"score2":1},{"date":"2015-08-10","team1":{"key":"westbrom","name":"West Bromwich Albion","code":"WBA"},"team2":{"key":"mancity","name":"Manchester City","code":"MCI"},"score1":0,"score2":3}]}]};
data.rounds.forEach((round) => {
round.matches.forEach((match) => {
console.log(`Results ${ match.score1 } | ${ match.score2 }`);
})
});
Basically you're using a mixture of array and object references.
You use your object references (data.rounds or round.matches) to get to specific properties on your object. Then you can you array functions (.forEach() which you can read about here) to access the objects in each array. Then you just access the properties of those sub objects.
Hope this helps.
Building on Phil's comment, something like this should help you iterate through the matches and do something with each.
obj.rounds[0].matches.forEach(match => {
console.log(match);
})
The snippet shared is actually a object. Inside this object there is a key by name rounds, which is again array of objects.
So data.rounds will give the value which is an array.
Inside this array there is array of matches. But data.rounds is array of only one object. Hence data.rounds[0] will allow to access it's value. [0] being the index, since in array the first element is at 0 index & data.rounds[0].matches will give the array of matches
var data = {
"name": "English Premier League 2015/16",
"rounds": [{
"name": "Play-Off um 1 Premierleague-Platz:",
"matches": [
//other objects
]
}
console.log(data.rounds[0].matches)
DEMO
I guest that your data is structured in a JSON that you are going to decoded using the json_decode function like this:
$myMatches = json_decode($yourJSON);
After that JSON gets converted into an object you can access any property by following the following rules:
Every opening curly bracket on the JSON gets converted into an object, and you will have to use the arrow syntax like this: $myMatches->attribute
For example, imagine an object "$person" with the following structure:
{
"name": "manutd",
"lastname": "Manchester United",
"phone": "MUN"
}
To print the name you will have to do:
echo $person->name;
On the other hand, every normal bracket gets transformed into an array and you have to use brackets to access that information (like any other array), like this: $myMatches['attribute']
For example that same person but now with array syntax:
[
"name": "manutd",
"lastname": "Manchester United",
"phone": "MUN"
]
To print the name you will have to do:
echo $person['name'];
Now, for your question in particular
That said, if you want to print the date of the first round of the first match, you will have to do:
echo $myMatches->rounds[0]->matches[0]->date;
I have prepared this functions for your disposal:
//This function returns all the matches in one tournament round
function getMatchesOfRound($myMatches, $roundNumber)
{
return $myMatches->rounds[$roundNumber]->matches;
}
//This function returns all the matches played by $teamKey
function getAllMatchesOfTeam($myMatches, $teamKey){
$matches = [];
foreach($myMatches->rounds as $rounds)
foreach($rounds->matches as $match)
if($match->team1->key == $teamKey || $match->team2->key == $teamKey) $matches[] = $match;
return $matches;
}
//this function determines the winner of a given match and returns the $teamKey
function getWinerFromMatch($match){
if($match->score1 > $match->score2) return $match->team1;
else if($match->score1 < $match->score2) return $match->team2;
else return null;
}
//This function returns all matches won by $teamKey
function getAllMatchesOfTeam($myMatches, $teamKey){
$matches = [];
foreach($myMatches->rounds as $rounds)
foreach($rounds->matches as $match)
if(getWinerFromMatch($match) == $teamKey) $matches[] = $match;
return $matches;
}
//This function returns all ties
function getAllMatchesOfTeam($myMatches, $teamKey){
$matches = [];
foreach($myMatches->rounds as $rounds)
foreach($rounds->matches as $match)
if(getWinerFromMatch($match) == null) $matches[] = $match;
return $matches;
}
You get the idea, I hope this helps. I have not tested the code, maybe it has minor sytax errors.
result = {
"name": "English Premier League 2015/16",
"rounds": [
{
"name": "Play-Off um 1 Premierleague-Platz:",
"matches": [
{
"date": "2015-08-08",
"team1": {
"key": "manutd",
"name": "Manchester United",
"code": "MUN"
},
"team2": {
"key": "tottenham",
"name": "Tottenham Hotspur",
"code": "TOT"
},
"score1": 1,
"score2": 0
},
{
"date": "2015-08-08",
"team1": {
"key": "bournemouth",
"name": "Bournemouth",
"code": "BOU"
},
"team2": {
"key": "astonvilla",
"name": "Aston Villa",
"code": "AVL"
},
"score1": 0,
"score2": 1
},
{
"date": "2015-08-08",
"team1": {
"key": "everton",
"name": "Everton",
"code": "EVE"
},
"team2": {
"key": "watford",
"name": "Watford",
"code": "WAT"
},
"score1": 2,
"score2": 2
},
{
"date": "2015-08-08",
"team1": {
"key": "leicester",
"name": "Leicester City",
"code": "LEI"
},
"team2": {
"key": "sunderland",
"name": "Sunderland",
"code": "SUN"
},
"score1": 4,
"score2": 2
},
{
"date": "2015-08-08",
"team1": {
"key": "norwich",
"name": "Norwich",
"code": "NOR"
},
"team2": {
"key": "crystalpalace",
"name": "Crystal Palace",
"code": "CRY"
},
"score1": 1,
"score2": 3
},
{
"date": "2015-08-08",
"team1": {
"key": "chelsea",
"name": "Chelsea",
"code": "CHE"
},
"team2": {
"key": "swansea",
"name": "Swansea",
"code": "SWA"
},
"score1": 2,
"score2": 2
},
{
"date": "2015-08-09",
"team1": {
"key": "arsenal",
"name": "Arsenal",
"code": "ARS"
},
"team2": {
"key": "westham",
"name": "West Ham United",
"code": "WHU"
},
"score1": 0,
"score2": 2
},
{
"date": "2015-08-09",
"team1": {
"key": "newcastle",
"name": "Newcastle United",
"code": "NEW"
},
"team2": {
"key": "southampton",
"name": "Southampton",
"code": "SOU"
},
"score1": 2,
"score2": 2
},
{
"date": "2015-08-09",
"team1": {
"key": "stoke",
"name": "Stoke City",
"code": "STK"
},
"team2": {
"key": "liverpool",
"name": "Liverpool",
"code": "LIV"
},
"score1": 0,
"score2": 1
},
{
"date": "2015-08-10",
"team1": {
"key": "westbrom",
"name": "West Bromwich Albion",
"code": "WBA"
},
"team2": {
"key": "mancity",
"name": "Manchester City",
"code": "MCI"
},
"score1": 0,
"score2": 3
}
]
}
]
};
for ( let i=0, totalRounds = result.rounds.length; i < totalRounds; i++) {
let round = result.rounds[i];
console.log( round.name );
for ( let j=0, totalMatches = round.matches.length; j < totalMatches; j++ ) {
let match = round.matches[j];
console.log( match.date + ': ' + match.team1.name + " " + match.score1 + " - " + match.team2.name + " " + match.score2)
}
}
You can fetch all the matches in a variable then iterate over it using any loop.
If there is only 1 round then this will do the task.
var matches = object.rounds[0]. matches;
for(var match in matches){
console.log(match);
}
If there more rounds then you to first iterate over rounds and inside that loop fetch all the matches in that particular round.
for(var round in object.rounds){
var matches = round.matches;
for(var prop in matches){
console.log(prop);
}
}
I have sample json. In that json I need to check the following things.
Valid Json or not.
Name key is required without empty(list name and item name).
items array length need to greater than 5.
I attached my code and its not working. I feel this approach is not good. Can anyone please suggest to me the correct path.
var test = '{ "lists": [ { "items": [ { "name": "Curd0", "sequence": 3 }, { "name": "Curd1", "sequence": 2 }, { "name": "Curd2", "sequence": 1 }, { "name": "Curd3", "sequence": 4 }, { "name": "Curd4", "sequence": 10 }, { "name": "Curd5", "sequence": 9 }, { "name": "Curd6", "sequence": 8 }, { "name": "Curd7", "sequence": 7 }, { "name": "Curd8", "sequence": 6 }, { "name": "Curd9", "sequence": 5 } ], "name": "Curd Family", "status": "new", "created_by": 100036, "created_on": "2016-05-05T13:18:26.169Z" }, { "items": [ { "name": "Milk0", "sequence": 3 }, { "name": "Milk1", "sequence": 2 }, { "name": "Milk2", "sequence": 1 }, { "name": "Milk3", "sequence": 4 }, { "name": "Milk4", "sequence": 10 }, { "name": "Milk5", "sequence": 9 }, { "name": "Milk6", "sequence": 8 } ], "name": "Milk Family", "status": "new", "created_by": 100036, "created_on": "2016-05-05T13:18:44.504Z" }, { "items": [ { "name": "Water0", "sequence": 3 }, { "name": "Water1", "sequence": 2 }, { "name": "Water2", "sequence": 1 }, { "name": "Water3", "sequence": 4 }, { "name": "Water4", "sequence": 10 }, { "name": "Water5", "sequence": 9 }, { "name": "Water6", "sequence": 8 } ], "name": "Water Family", "status": "new", "created_by": 100036, "created_on": "2016-05-05T13:19:02.329Z" }, { "items": [ { "name": "Fruit0", "sequence": 3 }, { "name": "Fruit1", "sequence": 2 }, { "name": "Fruit2", "sequence": 1 }, { "name": "Fruit3", "sequence": 4 } ], "name": "Fruit Family", "status": "new", "created_by": 100036, "created_on": "2016-05-05T13:19:15.503Z" } ] }';
function Validate(data, callback) {
for (index in lists) {
if (!lists.index.hasOwnProperty('name')) {
callback("Name cannot be empty");
}
var itemList = lists.index.items;
if (itemList.length < 5) {
callback("List need more than 5 lenth");
}
for ( i = 0; i < itemList.length; i++) {
if (!itemList[i].hasOwnProperty('name')) {
callback("Item Name cannot be empty");
}
}
}
callback(null);
}
Validate(test, function (err) {
console.log(err);
});
every is probably what you need :
function containsNameInLists(element) {
return element.hasOwnProperty('name');
}
function containsNameInItems(element) {
return element.items.every(containsKeyName);
}
function containsKeyName(element) {
return element.hasOwnProperty('name');
}
function lengthSuperiorTo5(element) {
return element.length > 5;
}
function itemsArrayLength(){
return element.items.every(lengthSuperiorTo5);
}
You can test if your string is a valid JSON string simply using JSON.parse
Try to play with the string to test different functions.
Demo
EDIT : I've added the additionnal functions :
EDIT DEMO
The callback will call multiple times, please add a "return":
return callback(...);
For validate json in node.js, there is a good library: https://github.com/hapijs/joi
I am trying to parse JSON data from the flixter API to import it to my blog.
In the example below, I tried using JavaScript to output the cast info for the movie expendables.
My full goal would be to get it to output the information
"Sylvester Stallone as Barney Ross, Jason Statham as Lee Christmas" and so on.
Here is my jsFiddle http://jsfiddle.net/k3V9p/3/
var jsontext = '{
"cast": [{
"id": "162664630",
"name": "Sylvester Stallone",
"characters": ["Barney Ross"]
}, {
"id": "162653720",
"name": "Jason Statham",
"characters": ["Lee Christmas"]
}, {
"id": "162652223",
"name": "Jet Li",
"characters": ["Yin Yang"]
}, {
"id": "162664307",
"name": "Dolph Lundgren",
"characters": ["Gunnar Jensen"]
}, {
"id": "162670654",
"name": "Chuck Norris",
"characters": ["Booker"]
}, {
"id": "326392465",
"name": "Terry Crews",
"characters": ["Hale Caesar"]
}, {
"id": "770731413",
"name": "Randy Couture",
"characters": ["Toll Road"]
}, {
"id": "770833479",
"name": "Liam Hemsworth",
"characters": ["Billy the Kid"]
}, {
"id": "770704326",
"name": "Scott Adkins",
"characters": ["Hector"]
}, {
"id": "770670020",
"name": "Nan Yu",
"characters": ["Maggie"]
}, {
"id": "162670708",
"name": "Jean-Claude Van Damme",
"characters": ["Jean Vilain"]
}, {
"id": "162652509",
"name": "Bruce Willis",
"characters": ["Mr. Church"]
}, {
"id": "162662233",
"name": "Arnold Schwarzenegger",
"characters": ["Trench"]
}, {
"id": "489251774",
"name": "Amanda Ooms",
"characters": ["Pilar"]
}, {
"id": "377608335",
"name": "Charisma Carpenter",
"characters": ["Lacy"]
}, {
"id": "771417014",
"name": "Nikolette Noel",
"characters": ["Sophia"]
}],
"links": {
"rel": "http://api.rottentomatoes.com/api/public/v1.0/movies/771238417.json"
}
}';
var titles = JSON.parse(jsontext);
document.write(titles.cast);
The problem you have is with end of lines in your string literal. You can write them like this :
var jsontext = '{\
"cast": [{\
But in your case, it's not clear if you really need JSON, as you could directly create your object as
var titles = {
cast": [{
...
I would say that the first problem you have is the JSON.parsing (which dystroy has perfectly answered), after solving that you will have to deal with rendering which you could do like this: (demo)
var titles = {
"cast": [{
"id": "162664630", "name": "Sylvester Stallone", "characters": ["Barney Ross"]
}, {"id": "162653720", "name": "Jason Statham", "characters": ["Lee Christmas"]
}, {"id": "162652223", "name": "Jet Li", "characters": ["Yin Yang"]
}, {"id": "162664307", "name": "Dolph Lundgren", "characters": ["Gunnar Jensen"]
}, {"id": "162670654", "name": "Chuck Norris", "characters": ["Booker"]
}, {"id": "326392465", "name": "Terry Crews", "characters": ["Hale Caesar"]
}, {"id": "770731413", "name": "Randy Couture", "characters": ["Toll Road"]
}, {"id": "770833479", "name": "Liam Hemsworth", "characters": ["Billy the Kid"]
}, {"id": "770704326", "name": "Scott Adkins", "characters": ["Hector"]
}, {"id": "770670020", "name": "Nan Yu", "characters": ["Maggie"]
}, {"id": "162670708", "name": "Jean-Claude Van Damme", "characters": ["Jean Vilain"]
}, {"id": "162652509", "name": "Bruce Willis", "characters": ["Mr. Church"]
}, {"id": "162662233", "name": "Arnold Schwarzenegger", "characters": ["Trench"]
}, {"id": "489251774", "name": "Amanda Ooms", "characters": ["Pilar"]
}, {"id": "377608335", "name": "Charisma Carpenter", "characters": ["Lacy"]
}, {"id": "771417014", "name": "Nikolette Noel", "characters": ["Sophia"]
}],
"links": {
"rel": "http://api.rottentomatoes.com/api/public/v1.0/movies/771238417.json"
}
},
star,
staring = [];
for (star = 0; star < titles.cast.length; star++) {
staring.push(titles.cast[star].name + ' as ' + titles.cast[star].characters[0]);
}
document.getElementById('Credits').innerHTML = staring.join(', ');
You don't need to change what flixster api is returning to you.
The problem is you need to call the API directly... do not copy&paste the result.
See the usage here http://developer.rottentomatoes.com/docs/read/json/v10/examples
Just do the Ajax call and onSuccess (searchCallback in the example) you will have the data parsed in json already.