Well, the problem is quite simple. I got an object of parsed table rows. Code for it is this:
var erg = [];
$("tr").each(function (index) {
var row = {};
var test = $(this).children();
row['column1'] = test[0].textContent;
row['column2'] = test[1].textContent;
row['column3'] = test[2].textContent;
row['column4'] = test[3].textContent;
row['column5'] = test[4].textContent;
row['column6'] = test[5].textContent;
row['column7'] = test[6].textContent;
erg.push(row);
});
And I wanna pass a variable var my_variable="blabla" to it without ruining the structure of the object. So how could i bring that object into a structure like this?:
Object{my_variable="my_variable_value"}, Object{my_table=[Object{...}, Object{...}]} //all the objects of the table
$.extend({}, erg, my_variable); only messed my object up.
I want it in that structure so i can pass it as json to my php script and filter my variable easily. Any tips, links, code snippets? :)
I'm not sure at which point you want to add that, but you may simply wrap your array with another object, and add your property to that same object.
This is basically what Florent's answer does, but using an object literal instead of a "class" and prototype:
// (your current code)
var wrapper = {
my_variable: 'something',
my_table: erg
};
You can define a class and add the needed variables to its prototype.
First you need a little utility to do that:
function createSharedStruct() {
// Define a shared structure
var Struct = function() {};
// Define a method to define a shared variable
Struct.share = function(variable, value) {
Struct.prototype[variable] = value;
};
return Struct;
}
And then, update your code:
// Create the shared structure
var rowClass = createSharedStruct();
// Register your shared variables
rowClass.share('my_variable', 'my_variable_value');
var erg = [];
$("tr").each(function (index) {
var test = $(this).children();
// Create a new row
var row = new rowClass();
row['column1'] = test[0].textContent;
row['column2'] = test[1].textContent;
row['column3'] = test[2].textContent;
row['column4'] = test[3].textContent;
row['column5'] = test[4].textContent;
row['column6'] = test[5].textContent;
row['column7'] = test[6].textContent;
erg.push(row);
});
// No matter when you share a variable, it will be defined among
// all instances of the same struct.
rowClass.share('my_other_var', 42);
Now you can access shared variables:
console.log(erg[0].my_other_variable); // 42
console.log(erg[1].my_other_variable); // 42
Demo available on JSFiddle.
Related
I tried a lot searching and didnt get desired solutions.
What I want to achieve is
var myObject {
id1 : {
name:place_name,
location : place_loc
},
id2 : {
name:place_name,
location : place_loc
},
id3 : {
name:place_name,
location : place_loc
}
}
What I want to do is that Initially I want the properties "id1", "id2".. to be dynamic. And then dynamically assign name:place_name and other properties of each property.
I dont know the number of properties (id1,id2,id3...) hence would like to add them dynamically and following the addition of properties(id1,id2... ) I want to dynamically add the property values. (place_name & place_loc) of each id.
My code looks something like this.
var myObject = {};
myObject[idnumber1].place = "SomePlace1";
myObject[idnumber1].place = "SomeLoc1";
myObject[idnumber2].place = "SomePlace1";
myObject[idnumber2].place = "SomeLoc1";
But it gives error.
I know it seems simple doubt but any help would be grateful.
Thanks in advance. :)
You are trying to set a value of already assigned objects at keys "idnumber1", etc.
What you'll need is to initialize each objects for your ids like this:
var myObject = {};
myObject[idnumber1] = {};
myObject[idnumber1].place = "SomePlace1";
myObject[idnumber2] = {};
myObject[idnumber2].place = "SomeLoc1"
I would do it this way, it's not exactly what you did ask for, but I think it will become easier to change this later on.
function Place(name, location) {
this.name = name;
this.location = location;
}
var myObject = {}
myObject['id1'] = new Place('Foo', 'Bar');
myObject['id2'] = new Place('Internet', 'test');
console.log(myObject);
To dynamically create objects in your collection, you can use a numerical counter variable to create your object collection (myObject["id" + i] = {name: place_name, location: place_loc}).
An example:
var myObject = {};
for (i = 0; i < 20; i++){
myObject["id" + i] = {name: place_name, location: place_loc}
}
In practice, you can use a counter that you increment outside of a loop.
I have a dynamic number of files (structure, tab1, tab2, tab3, ...) that I load into my site.
For each of them I want to define variables like "total", "different", ....
dbVariables.structure.total = aaa
dbVariables.tab1.total = 123
dbVariables.tab2.total = 456
dbVariables. ... .total = xx
dbVariables.structure.different= aaa
dbVariables.tab1.different = abc;
dbVariables.tab2.different = def;
dbVariables. ... .different = xxx
Since putting them to [window] is not nice, i created dbVariables Object to store the variables there. I currently have a for loop that loads the files and I can even create dbVariable.tab1, dbVariable.tab2 etc. dynamically, but how would I stitch the last peace of information to it to?
var dbVariables= {};
for (i=0; i< fileNamesArray.length; i++){
filename = fileNamesArray[i];
processData(filename);
}
});
// the ".total" is not accepted :-(
function processData(filename){
dbVariables[filename].total = 123;
};
You can't do this:
dbVariables[filename].total = 123;
Because there is no dbVariables[filename], so you can set a property on undefined. You need to add it first.
function processData(filename){
dbVariables[filename] = {};
dbVariables[filename].total = 123;
};
But you might be better off if dbVariables was an array rather than an object unless you are certain that there are no duplicate filename.
You need to set dbVariables[filename] before adding the total. try something like that :
function processDatra(filename){
if(typeof dbVariables[filename] === 'undefined') dbVariables[filename] = {};
dbVariables[filename].total = 123;
};
What I am trying to do is rewrite content on the page depending on which object I have selected. I have some objects like so:
function floorPlan(name,rev,sqft,bedrm,bthrm) {
this.name = name;
this.rev = rev;
this.sqft = sqft;
this.bedrm = bedrm;
this.bthrm = bthrm;
}
// 1BR Plans
var a1 = new floorPlan('A1',false,557,1,1);
var a2 = new floorPlan('A2',false,652,1,1);
var a3 = new floorPlan('A3',false,654,1,1);
var a4 = new floorPlan('A4',false,705,1,1);
var a5 = new floorPlan('A5',false,788,1,1);
// The Selected plan
var currentPlan = floorPlan.a1;
I am having the user control this via a .click() function in a menu:
$('.sideNav li').click(function() {
// Define the currentPlan
var current = $(this).attr('id');
var currentPlan = floorPlan.current;
});
The problem is that currentPlan keeps coming back as undefined and I have no idea why. Should I be defining currentPlan differently? I can't seem to find any resources to help me find the answer.
UPDATED:
I switched out a few parts per your suggestions:
// The Selected plan
var currentPlan = a1;
and....
// Define the currentPlan
var current = $(this).attr('id');
currentPlan = current;
However, everything is still returning undefined in the click function (not initially though).
First of all $('this') should be $(this)
Secondly you're trying to use a read ID from your LI as a variable name. That doesn't work. If you store your plans in an array you can use the ID to search in that array:
var plans=Array();
plans["a1"]=new floorPlan('A1',false,557,1,1);
plans["a2"]=new floorPlan('A2',false,652,1,1);
Then your jQuery code should be altered to this:
$('.sideNav li').click(function() {
// Define the currentPlan
var current = $(this).attr('id');
var currentPlan = plans[current];
alert(currentPlan);
});
I created a JSFiddle for this. Is this what you were looking for?
Use as floorPlan.currentPlan = a1;
instead of var currentPlan = floorPlan.a1;
Please create a plunker and will correct if any issue.
I spot two errors.
When you write var inside a function, that variable is only accessible with that function. Right now you are creating a new variable in your anonymous function that is "hiding" the global variable with the same name.
So, first remove the var keyword from the assignment in the anonymous function (the one you call on "click").
Secondly I think you mean to assign floorPlan[current].
The final line should read:
currentPlan = floorPlan[current];
It seems complicated for me.
First, I have this list:
liste_path_categories.push(
{ index: null
, letter: "letter1"
, type: key
, picture_url: "url1"
, id_categ: null
, response: "Answer here"
});
What I want is to extract from this big list an object in this form:
data["String1"]["String2"]= String3
With :
String1=list_path_categories[i].letter
String2=list_path_categories[i].id_categ
String3=list_path_categories[i].response
example:
data['A']['12'] : "A_answer"
To declare the data i make this:
var data = new Object(new Object);
How I can set all the values in data?
You can use the Array.forEach method to iterate through liste_path_categories and construct your data object.
Example:
var liste_path_categories = [];
var data = {};
liste_path_categories.push(...);
...
liste_path_categories.push(...);
liste_path_categories.forEach(function(element) {
data[element.letter] = {};
data[element.letter][element.id_categ] = element.response;
});
jsFiddle example : http://jsfiddle.net/3ZvNf/
Your question is pretty vague but do you mean something like this?
Setting a dynamic property in an object wich belongs to another object?
data['A']['12'].answer = "A_answer"
Instead of using strings, you have to use the variables in your property access:
var data = {};
if (!data[String1]) {
data[String1] = {}; // make sure that data[String1] exists and is an object
}
data[String1][String2] = String3;
If you want to do this for elements in the array, you have to iterate over the array.
P.S.: I recommend to use more expressive variable names than StringX.
first create the constructor (in OOP terminology):
var ctor_object = function(letter,id_categ,response)
{
this.letter = letter;
this.id_cated = id_categ;
this.response = response;
}
(in genereal you should omit the ctor_ syntax and name it directly after the name of the class of your object)
then use your constructor upon your list of categories:
var length = liste_path_categories.length,
element = null;
for (var i = 0; i < length; i++)
{
element = liste_path_categories[i];
my_obj = new ctor_object(element.letter,element.id_categ,element.reponse)
// Do something with my_obj
}
I have an object within an object. It looks like this.
var myLib = {
object1: {}
}
My basic problem is that I wanted to end up like this. So I would like to do this dynamically I will not know the property's or additional objects until run time.
var myLib = {
object1: ({"A1":({"Color":"Blue",
"height":50})
})
}
From reading here on Stack Overflow I know that I can create an object within an object by simply going like this:
myLib.Object1["A1"] = "Something"
But this does not produce what I'm looking for.
I tried this syntax which I know is wrong but basically
mylib.Object1["A1"].["color"]="Blue";
so basically here is the question. I would like to create object "A1" under "mylib.Object" and immediately add property color = "blue" to "A1". I would need to do this for several other properties, but if I can figure out how to do this for one, I can figure it out for the rest. How can I accomplish this task?
No jQuery, please. Just plain old JavaScript is what I'm looking for.**
Once I create the object and properties I would imagine I can just use a for loop to loop through the properties for that object. Like so:
for(key in mylib.Object1["A1"]){}
Right?
You can create it all from scratch like this:
var myLib = {};
myLib.object1 = {};
// assuming you get this value from your code somewhere
var x = "A1";
myLib.object1[x] = {Color: "Blue", height: 50};
Or, if all values are in variables:
var myLib = {};
myLib.object1 = {};
// assuming you get this value from your code somewhere
var x = "A1";
var colorProp = "Color";
var colorPropValue = "Blue";
var heightProp = "height";
var heightPropValue = 50;
myLib.object1[x] = {}; // create empty object so we can then add properties to it
myLib.object1[x][colorProp] = colorPropValue; // add one property
myLib.object1[x][heightProp] = heightPropValue; // add another property
These syntaxes create identical results:
myLib.object1.A1 = {};
var x = "A1";
myLib.object1[x] = {};
The first can only be used when the property name is known when you write the code and when the property name follows the proper rules for a javascript identifier. The second can be used any time, but is typically used when the property name is in a variable or when it doesn't follow the rules for a javascript identifier (like it starts with a digit).