I am not very strong with Javascript. I have a nested array which is a JSON representation of the backend data. It shows a list of proofs and the images used in each proof. Its looks like below:
var project = [{
"proof":"Proof_1",
"images":[
{
"image_id":"12469",
"name":"1911791794.jpg",
},
{
"image_id":"12470",
"name":"1911802897.jpg"
},
{
"image_id":"12471",
"name":"1911761073.jpg"
}
},
{
"proof":"Proof_2",
"images":[
{
"image_id":"12469",
"name":"1911791794.jpg",
},
{
"image_id":"12470",
"name":"1911802897.jpg"
}
}];
I want to add the image_count to each proof section,so that modified data structure looks like this:
var project = [{
"proof":"Proof_1",
"image_count": 3, //<----this is new property I want to add
"images":[
{
"image_id":"12469",
...
I checked some answers but because of my lack of understanding javascript iteration properly I am unable to get this done.
When I do:
for (var proof in project)
{
console.log(proof);
}
I just get 0,1,2...etc printed. I am not getting this, so I help someone in SO will help me understand how to add this property I want.
Thanks in advance.
You can take advantage of Array.prototype.map method:
project = project.map(function (item) {
item.image_count = item.images.length;
return item;
});
Working demo.
Also, as #Sebastian Lasse pointed out - you should name your array using plural form to avoid confusion (projects instead of project).
You can use .map or simple loop
var projects = [{
"proof": "Proof_1",
"images": [{
"image_id": "12469",
"name": "1911791794.jpg",
}, {
"image_id": "12470",
"name": "1911802897.jpg"
}, {
"image_id": "12471",
"name": "1911761073.jpg"
}]
}, {
"proof": "Proof_2",
"images": [{
"image_id": "12469",
"name": "1911791794.jpg",
}, {
"image_id": "12470",
"name": "1911802897.jpg"
}]
}];
projects = projects.map(function (element) {
element.image_count = element.images.length;
return element;
});
console.log(projects);
var len = projects.length, i;
for (i = 0; i < len; i++) {
projects[i].image_count = projects[i].images.length;
}
console.log(projects);
You could - after correcting the missing ] error in your JSON - do this :
project.forEach(function(proof) {
proof.image_count = proof.images.length;
})
demo -> http://jsfiddle.net/dLd8wvpb/
Related
I'm trying to create a piece of JavaScript that can read through specific parts of a linked object and place them iteratively into another piece of code which then places the code into HTML and into the front-end.
I've managed to get the fetch part working whereby it pulls in the JSON and can be read in the console, when summoned. Once the code runs, I'm able to refer to the data and bring out the whole dataset with something like:
console.log(AllOffers);
and I can drill down into something like the offerName in the JSON by using the following syntax in a variable and calling it in the console:
var OfferName = data.offersBreakdown.allOffers[0].offers[0].offerName;
However this only pulls in the first iteration of offerName because in the variable I've set it to look into the first iteration of its parent, 'offers'. What I'm looking to do is create a variable which prints all of the offerName data so that I can call on it instead of the data_test variable further down in the code, which processes the data into HTML. Sounds confusing? It is.
Ideally what I think I need is to be able to ask it to look into each child item of 'offers' (rather than just the first one) and then have it look for 'offerName'. I can't work out how one would achieve this. The best I can come up with is to remove the [0] from 'offers', but if I do that, it returns undefined as the result.
Here's my JavaScript (and a bit of jQuery):
<script>
// fetch call for the JSON data (see below)
fetch('api_url', {
headers: {
'Authorization': 'auth_token'
}
})
.then(response => response.json())
.then(function (data) {
var AllOffers = data.offersBreakdown.allOffers[0];
var AllOffers_Offers = data.offersBreakdown.allOffers[0].offers;
var OfferName = data.offersBreakdown.allOffers[0].offers[0].offerName;
var OfferImageUrl = data.offersBreakdown.allOffers[0].offers[0].imageUrl;
console.log(AllOffers);
function createCard(cardData) {
var cardTemplate = [
'<div class="card">',
'<p>My name is: ',
cardData.Offer || 'No offer',
'</p>',
'<p>My job is: ',
cardData.Img || 'No image',
'</p></div>'
];
// a jQuery node
return jQuery(cardTemplate.join(''));
}
var data_test = [
{ "Name": OfferName, "Img": OfferImageUrl },
{ "Name": OfferName, "Img": OfferImageUrl },
{ "Name": OfferName, "Img": OfferImageUrl },
];
var cards = jQuery();
// Store all the card nodes
data_test.forEach(function(item, i) {
cards = cards.add(createCard(item));
});
// Add them to the page... for instance the <body>
jQuery(function() {
jQuery('body').append(cards);
});
</script>
Here's the JSON
<script>
// the JSON
{
"offersBreakdown": {
"totalAddedOffers": 0,
"totalOffers": 2,
"totalAddedRewards": 0,
"totalRewards": 0,
"totalAddedStreakOffers": 0,
"totalStreakOffers": 0,
"allOffers": [
{
"offers": [
{
"offerName": "Offer name 1",
"imageUrl": "https://url_path_1.jpg"
},
{
"offerName": "Offer name 2",
"imageUrl": "https://url_path_2.jpg"
},
{
"offerName": "Offer name 3",
"imageUrl": "https://url_path_3.jpg"
},
{
"offerName": "Offer name 4",
"imageUrl": "https://url_path_4.jpg"
}
]
}
</script>
I'm assuming what you're looking for is a way to loop through all of the offerNames, in which case a simple for loop would suffice. Since your data includes nested arrays and objects, we need two loops, one to iterate through your allOffers array and then a nested for loops to iterate through the offers array inside of your allOffers array
var data = {
"offersBreakdown": {
"totalAddedOffers": 0,
"totalOffers": 2,
"totalAddedRewards": 0,
"totalRewards": 0,
"totalAddedStreakOffers": 0,
"totalStreakOffers": 0,
"allOffers": [{
"offers": [{
"offerName": "Offer name 1",
"imageUrl": "https://url_path_1.jpg"
}, {
"offerName": "Offer name 2",
"imageUrl": "https://url_path_2.jpg"
}, {
"offerName": "Offer name 3",
"imageUrl": "https://url_path_3.jpg"
}, {
"offerName": "Offer name 4",
"imageUrl": "https://url_path_4.jpg"
}]
}]
}
};
var allOffers = [];
var jsonObjectAllOffers = data.offersBreakdown.allOffers;
for (var i = 0; i < jsonObjectAllOffers.length; i++) {
var offers = jsonObjectAllOffers[i].offers;
for (var j = 0; j < offers.length; j++) {
var objectToAppend = {
"Name": offers[j]["offerName"],
"Img": offers[j]["imageUrl"]
};
allOffers.push(objectToAppend);
}
}
console.log(allOffers);
And now you can use your allOffers variable to loop through with the "forEach" and make into HTML
I really want to convert a object to array but my codes doesn’t worked.
data = "errors": {
"user": {
"name": "empty"
},
{
"length": "exceeds"
},
"title": {
"name": "empty"
},
{
"length": "exceeds"
}
}
Now I want to make them:
data = ["empty", "exceeds", "empty", "exceeds"];
What I’ve done so far is:
var arr = Object.keys(data[i].data.errors).map(function(k) {
return data[i].data.errors[k]
});
console.log(arr);
But the output is not what I expected. Please help. Thank very much.
If you always know the keys of the inner objects are going to be name and length a short way might be:
var out = Object.keys(data.errors).reduce(function (p, c) {
return p.concat([data.errors[c].name, data.errors[c].length]);
}, []);
DEMO
Is there any way in dustjs to iterate through array and get the number of occurrence?
I am trying to get the count of type='MOBILE' from the JSON data below:
[
{
"type": "MOBILE",
"formattedPhoneNumber": "5123 4566"
},
{
"type": "MOBILE",
"formattedPhoneNumber": "5123 4568"
},
{
"type": "MOBILE",
"formattedPhoneNumber": "5123 4568"
},
{
"type": "LANDLINE",
"formattedPhoneNumber": "5123 4568"
}
]
here I am expecting a count of 3 from above example where type is 'MOBILE'.
You can write a simple helper to do this for you. A helper transforms data from your context in a specific way. For more information, you can read the documentation on context helpers
{
"numbers": [{ "type": "MOBILE", ... }, { ... }],
"countByKey": function(chunk, context, bodies, params) {
var target = context.resolve(params.target);
var key = context.resolve(params.key);
var value = context.resolve(params.value);
return target.filter(function(item) {
return item[key] === value;
}).length;
}
}
Then you can use your helper in a template like this:
{#countByKey target=numbers key="type" value="MOBILE"}You have {.} mobile numbers{/countByKey}
I have 2 array objects in Angular JS that I wish to merge (overlap/combine) the matching ones.
For example, the Array 1 is like this:
[
{"id":1,"name":"Adam"},
{"id":2,"name":"Smith"},
{"id":3,"name":"Eve"},
{"id":4,"name":"Gary"},
]
Array 2 is like this:
[
{"id":1,"name":"Adam", "checked":true},
{"id":3,"name":"Eve", "checked":true},
]
I want the resulting array after merging to become this:
[
{"id":1,"name":"Adam", "checked":true},
{"id":2,"name":"Smith"},
{"id":3,"name":"Eve", "checked":true},
{"id":4,"name":"Gary"},
]
Is that possible? I have tried angular's array_merge and array_extend like this:
angular.merge([], $scope.array1, $scope.array2);
angular.extend([], $scope.array1, $scope.array2);
But the above method overlap the first 2 objects in array and doesn't merge them based on matching data. Is having a foreach loop the only solution for this?
Can someone guide me here please?
Not sure if this find of merge is supported by AngularJS. I've made a snippet which does exactly the same:
function merge(array1, array2) {
var ids = [];
var merge_obj = [];
array1.map(function(ele) {
if (!(ids.indexOf(ele.id) > -1)) {
ids.push(ele.id);
merge_obj.push(ele);
}
});
array2.map(function(ele) {
var index = ids.indexOf(ele.id);
if (!( index > -1)) {
ids.push(ele.id);
merge_obj.push(ele);
}else{
merge_obj[index] = ele;
}
});
console.log(merge_obj);
}
var array1 = [{
"id": 1,
"name": "Adam"
}, {
"id": 2,
"name": "Smith"
}, {
"id": 3,
"name": "Eve"
}, {
"id": 4,
"name": "Gary"
}, ]
var array2 = [{
"id": 1,
"name": "Adam",
"checked": true
}, {
"id": 3,
"name": "Eve",
"checked": true
}, ];
merge(array1, array2);
Genuinely, extend in Angular works with object instead of array. But we can do small trick in your case. Here is another solution.
// a1, a2 is your arrays
// This is to convert array to object with key is id and value is the array item itself
var a1_ = a1.reduce(function(obj, value) {
obj[value.id] = value;
return obj;
}, {});
var a2_ = a2.reduce(function(obj, value) {
obj[value.id] = value;
return obj;
}, {});
// Then use extend with those two converted objects
var result = angular.extend([], a1_, a2_).splice(1)
Notes:
For compatibility, reduce may not work.
The after array will replace the previous one. This is because of implementation of extend in Angular.
I have a json tree structure that is appended to by pressing invoke on this fiddle : http://jsfiddle.net/adrianjsfiddlenetuser/C6Ssa/4/
Press invoke multiple tiles on the fiddle & copy/paste the produced jSon intohttp://jsonlint.com/, the produced json is not valid
I need to produce this :
{
"nodes": [
{
"url": "asdfas",
"date": ""
},
{
"url": "asdfas",
"date": ""
},
{
"url": "asdfasfdasas",
"date": ""
}
]
}
Can this be amended so that multiple children can be added to the tree structure, I think I need to amend the var data somehow ?
Try:
var data = {nodes: []};
$("#add").on('click', function () {
data.nodes.push({
url: "some url",
date: new Date
});
$("#myDiv").text(JSON.stringify(data));
});
if not, I didn't understand your question ;)
http://jsfiddle.net/gY5yQ/
See if this helps http://jsfiddle.net/C6Ssa/12/
var data = [];
$("#add").click(add);
function add() {
data.push({
param1: "stuff",
param2:1,
param3:1
});
var sample = {};
sample.node = data
$("#myDiv").text(JSON.stringify(sample));
}