I have a variable that may contain objects or may be undefined. I wish to add additional objects to this variable. How do I do that?
code example when applicable:
function(){
var comments;
if(fbposts[fbpost].comments.count){
for(var comment in fbposts[fbpost].comments.data){
comments = ({
name: fbposts[fbpost].comments.data[comment].from.name,
link: "http://www.facebook.com/"+fbposts[fbpost].comments.data[comment].from.id,
img: "http://www.facebook.com/"+fbposts[fbpost].comments.data[comment].from.id+"/picture",
message: fbposts[fbpost].comments.data[comment].message,
created: timeDifference(Date.parse(fbposts[fbpost].comments.data[comment].created_time)),
})
}
}
return comments;}(),
Test if it is undefined and if so assign it to an empty object:
if (typeof yourVar === "undefined")
yourVar = {};
yourVar.additionalObject1 = { something : "test" };
yourVar.additionalObject2 = { something : "else" };
EDIT: OK, now that you've added code to your question, it seems like your comments variable should be an array, since you are adding to it in a loop. So I think you'd want to do something like this:
(function(){
var comments = [];
if(fbposts[fbpost].comments.count){
for(var comment in fbposts[fbpost].comments.data){
comments.push({
name: fbposts[fbpost].comments.data[comment].from.name,
link: "http://www.facebook.com/"+fbposts[fbpost].comments.data[comment].from.id,
img: "http://www.facebook.com/"+fbposts[fbpost].comments.data[comment].from.id+"/picture",
message: fbposts[fbpost].comments.data[comment].message,
created: timeDifference(Date.parse(fbposts[fbpost].comments.data[comment].created_time)),
});
}
}
return comments;
})();
comments will thus contain one element for each comment in your source data. If there are no comments it will be an empty array. (If you want it to return undefined if there are no comments then leave the variable declaration where it is as var comments and add comments=[]; just inside the if statement.)
If you're using jQuery (and why wouldn't you be?), then you want to look at $.extend()
http://api.jquery.com/jQuery.extend/
Related
I am coding for a server of RAGEMP and I'm getting the following error:
animais.indexOf is not a function
Here's a simplified version of my code:
var animaisNomes = ["falcao", "golfinho", "gato", "vaca", "javali", "macaco", "coiote", "veado", "orca", "rato", "cao", "puma"];
var animaisIDs = ["a_c_chickenhawk", "a_c_dolphin", "a_c_cat_01", "a_c_cow", "a_c_boar", "a_c_chimp", "a_c_coyote", "a_c_deer", "a_c_killerwhale", "a_c_rat", "a_c_retriever", "a_c_mtlion"];
mp.events.addCommand('animal', (player, fullText, animal) => {
index = animais.indexOf(animal)
player.outputChatBox(String(index))
});
After i typed the command /animal [some animal] it should return me the index of where that animal is in the list, but instead it returns me the error. Why?
Here's the full code
var animaisNomes = ["falcao", "golfinho", "gato", "vaca", "javali", "macaco", "coiote", "veado", "orca", "rato", "cao", "puma"];
var animaisIDs = ["a_c_chickenhawk", "a_c_dolphin", "a_c_cat_01", "a_c_cow", "a_c_boar", "a_c_chimp", "a_c_coyote", "a_c_deer", "a_c_killerwhale", "a_c_rat", "a_c_retriever", "a_c_mtlion"];
mp.events.addCommand('animal', (player, fullText, animal) => {
if (animaisNomes.includes(animal)) {
player.outputChatBox("Inclui")
index = animais.indexOf(animal)
player.outputChatBox(String(index))
}
else {
player.outputChatBox("Esse animal não está disponível.")
}
});
In the 7th line of the full code version, you wrote animais instread of animaisNomes.
Do index = animaisNomes.indexOf(animal) and it should work.
var animals is an object, the curly braces denotes an object {} in javascript.
indexOf would work for arrays and not objects.. arrays are denoted by []. So when you use this function on object it would not work. I would suggest you convert it to an array of objects like this..
var animais = [
{'falcao': "a_c_chickenhawk"},
{'golfinho': "a_c_dolphin"},
]
in this way you would be able to use indexOf but you would need to make changes to accomodate these key value pairs..
Website that I'm making is in two different languages each data is saved in mongodb with prefix _nl or _en
With a url I need to be able to set up language like that:
http://localhost/en/This-Is-English-Head/This-Is-English-Sub
My code look like that:
var headPage = req.params.headPage;
var subPage = req.params.subPage;
var slug = 'name';
var slugSub = 'subPages.slug_en';
var myObject = {};
myObject[slugSub] = subPage;
myObject[slug] = headPage;
console.log(myObject);
Site.find(myObject,
function (err, pages) {
var Pages = {};
pages.forEach(function (page) {
Pages[page._id] = page;
});
console.log(Pages);
});
After console.log it I get following:
{ 'subPages.slug_en': 'This-Is-English-Sub',
name: 'This-Is-English-Head' }
Is you can see objectname subPages.slug_en is seen as a String insteed of object name..
I know that javascript does not support underscores(I guess?) but I'm still looking for a fix, otherwise i'll be forced to change all underscores in my db to different character...
Edit:
The final result of console.log need to be:
{ subPages.slug_en: 'This-Is-English-Sub',
name: 'This-Is-English-Head' }
Insteed of :
{ 'subPages.slug_en': 'This-Is-English-Sub',
name: 'This-Is-English-Head' }
Otherwise it does not work
The reason you are seeing 'subPages.slug_en' (with string quotes) is because of the . in the object key, not the underscore.
Underscores are definitely supported in object keys without quoting.
Using subPages.slug_en (without string quotes) would require you to have an object as follows:
{ subPages: {slug_en: 'This-Is-English-Sub'},
name: 'This-Is-English-Head' }
Which you could set with the following:
myObject['subPages']['slug_en'] = subPage;
Or simply:
myObject.subPages.slug_en = subPage;
I'm having a problem getting an array of information stored properly as JSON.
I made a fiddle to illustrate the problem. Enter a set of tags and take a look at the console to see the output.
More explanation:
So I have an input that takes in a comma-separated list of tags, which I then format.
function createTagArray() {
// given an input value of 'tag1, tag2, tag3'
// returns array = ['tag1', 'tag2', 'tag3']
}
I thought what I needed to do next was the following:
loop over the array and create a 'tag' object for each item which also includes an id for the tag and the id of the contact the tag is associated with.
Each object is pushed to tags, an observable array.
function single_tag(id, contactId, tagLabel) {
var self = this;
self.id = id;
self.contactId = contactId;
self.tagLabel = tagLabel;
}
function createTags() {
var array = createTagArray();
for (var i = 0; i < array.length; i++) {
self.tags().push(new single_tag(uuid.generate(), self.contactId, array[i]));
}
}
Then, I converted it into JSON
self.contactInformation = function() {
return ko.toJS({
"id": self.contactId,
"firstname": self.firstname(),
"lastname": self.lastname(),
... other fields ...
"tags": self.tags(),
})
}
But, when I inspect the console output of calling this function, tags is a collection of arrays, not a nice json object.
How do I get it formatted correctly?
I tried this suggestion, and the tag json is structured correctly, but it is stored with escaped quotes, so that seems wrong.
Thanks for all the help!
I would recommend you knockout.mapping plugin for KO, it allow map complicated JSON structure to view model, even without declarations.
From the documentation
Let’s say you have a JavaScript object that looks like this:
var data = {
name: 'Scot',
children: [
{ id : 1, name : 'Alicw' }
]
}
You can map this to a view model without any problems:
var viewModel = ko.mapping.fromJS(data);
Now, let’s say the data is updated to be without any typos:
var data = {
name: 'Scott',
children: [
{ id : 1, name : 'Alice' }
]
}
Two things have happened here: name was changed from Scot to Scott and children[0].name was changed from Alicw to the typo-free Alice. You can update viewModel based on this new data:
ko.mapping.fromJS(data, viewModel);
And name would have changed as expected. However, in the children array, the child (Alicw) would have been completely removed and a new one (Alice) added. This is not completely what you would have expected. Instead, you would have expected that only the name property of the child was updated from Alicw to Alice, not that the entire child was replaced!
...
To solve this, you can specify which key the mapping plugin should use to determine if an object is new or old. You would set it up like this:
var mapping = {
'children': {
key: function(data) {
return ko.utils.unwrapObservable(data.id);
}
}
}
var viewModel = ko.mapping.fromJS(data, mapping);
In the jsfiddle you were using Knockout 3.0 which doesn't have support for textInput. This was added in 3.2. To use version 3.2 you need to use a cdn such as this: http://cdnjs.com/libraries/knockout
There was typeo in your binding. sumbit should be submit.
There was a problem with your constructor for single_tag. id was not used so I removed it:
function single_tag(contactId, tagLabel) {
var self = this;
self.contactId = contactId;
self.tagLabel = tagLabel;
}
Currently also contactId is not set because the observable has not been set to a value.
To convert to JSON you need to use ko.toJSON instead of ko.toJS:
self.contactInformation = function() {
return ko.toJSON({
"firstname": self.firstname(),
"tags": self.tags(),
})
}
Now when the console writes out an array appears:
{
"firstname":"test",
"tags":[
{"tagLabel":"test1"},
{"tagLabel":"test2"},
{"tagLabel":"test3"}
]
}
JsFiddle
So my problem was more basic than I was realizing. I'm using JSON Server to serve up my data, and I was pulling information from two parts of the database (contacts & tags).
When I tried to update my tags, I was trying to apply them to a property that didn't exist on the contact JSON in my database. Posting the tags separately worked though.
I have object that all of its fields are observable (knockout.observable).
I have other regular object too, that its fields have the same names like the first-object-fields.
I want to insert into each field of the first object, the value of the match-field at the second object.
For example:
var first = {
a:ko.observable(),
b:ko.observable()
};
var second= {
a:'my'
b:'fields';
};
I want the first object to look like:
first = {
a:ko.observable('my'),
b:ko.observable('fields')
};
Yes, of course, I can do it by 'each' loop.
But, my question is:
Is there any build-in function that does it?
You can use the ko.mapping plugin:
var results = ko.mapping.fromJS(second, first);
See Documentation
I have a JSON that looks like this:
{
"__v":0,
"_id":"526a7b9c1affd1401d000001",
"ranStr":"azsuC2Ers0qTEcpzS8Jrs1pZ7MQH0goa",
"userId":{
"username":"t",
"_id":"51e11b28418dcfd01f000002"
},
"meta":{
"numberComments":0,
"favs":0,
"views":112
},
"enddate":"2014-01-31T00:00:00.000Z",
"startdate":"2013-10-25T00:00:00.000Z",
"comments":[],
"categories":[],
"fileurl":[],
"telephone":"1234567890"
}
When I add an object to it:
addObj[obj.length] = saveobject;
the previous content gehts replaced.
When I make an array out of it and push the object:
addObj = [loadedJSON];
addObj.push(saveObj);
I get this after the first
[Object]
after the second so fare so good
[Object, Object]
and after the third it gets messed up
[Array(2), Object]
What do I miss?
I hope some one can help with this?
The way I hoped it would look like is this.
[Object, Object, Object, ...and so on]
EDIT
to be More specific
when I add a new Object I load the JSON file in a variable and then I try to add the new Object.
Which works for the first two objects but the third one is added to the first object so that I got this result.
[Array(2), Object]
I dont want it nested like this! But how do I get it like this?
[Object, Object, Object].
EDIT
So eventually you all were right I just mixed up the array when i loaded it the second time every thing is fine now thank for pointing me in the right direction.
on the first time:
var a= [];
var b= {};
b= 'some things';
a.push(b);
and wenn a.length != null
b= 'the rest';
a.push(b);
and now everything is just as expected!
As far as I understand it, this has nothing to do with JSON.
It seems you want to have an array storing successive instances of a given object (that happens to have been encoded in JSON at some point, but for the problem at hand we could not care less).
First, create a sorage array.
Then push each new instance into it.
var storage = []; // your storage array, initially empty
// ....
while (some_guy_wants_to_send_me_something ())
{
var new_object = get_what_the_guy_sent_me_that_happens_to_be_JSON_encoded();
storage.push (new_object);
}
EDIT:
If you use a button:
var storage = []; // your storage array, initially empty
// ....
function add_whatever_object ()
{
var new_object = get_what_the_guy_sent_me_that_happens_to_be_JSON_encoded();
storage.push (new_object);
}
// HTML
<button type="button" onclick='add_whatever_object();'>
I still don't see where the catch is.
check the if it is an array:
Array.isArray(loadedJSON) //true
do this:
loadedJSON.push(saveObj);
if it was not an array push it to an array:
var myarray = [];
myarray.push(loadedJSON);
an then push your other object:
myarray.push(saveObj);
an so on:
myarray.push(otherObj);
I am a little unclear on what you actually want, but based on a little speculation I was able to write the following code for you. I hope this will solve your problem.
var a ={
"__v":0,
"_id":"526a7b9c1affd1401d000001",
"ranStr":"azsuC2Ers0qTEcpzS8Jrs1pZ7MQH0goa",
"userId":{
"username":"t",
"_id":"51e11b28418dcfd01f000002"
},
"meta":{
"numberComments":0,
"favs":0,
"views":112
},
"enddate":"2014-01-31T00:00:00.000Z",
"startdate":"2013-10-25T00:00:00.000Z",
"comments":[],
"categories":[],
"fileurl":[],
"telephone":"1234567890"
};
var b ={
"__v":0,
"_id":"526a7b9c1affd1401d000001",
"ranStr":"azsuC2Ers0qTEcpzS8Jrs1pZ7MQH0goa",
"userId":{
"username":"t",
"_id":"51e11b28418dcfd01f000002"
},
"meta":{
"numberComments":0,
"favs":0,
"views":112
},
"enddate":"2014-01-31T00:00:00.000Z",
"startdate":"2013-10-25T00:00:00.000Z",
"comments":[],
"categories":[],
"fileurl":[],
"telephone":"1234567890"
};
var c ={
"__v":0,
"_id":"526a7b9c1affd1401d000001",
"ranStr":"azsuC2Ers0qTEcpzS8Jrs1pZ7MQH0goa",
"userId":{
"username":"t",
"_id":"51e11b28418dcfd01f000002"
},
"meta":{
"numberComments":0,
"favs":0,
"views":112
},
"enddate":"2014-01-31T00:00:00.000Z",
"startdate":"2013-10-25T00:00:00.000Z",
"comments":[],
"categories":[],
"fileurl":[],
"telephone":"1234567890"
};
var ObjArr = [];
ObjArr.push(a);
ObjArr.push(b);
ObjArr.push(c);
console.log(ObjArr);
Here is the fiddle to it => http://jsfiddle.net/rB3Un/