This question already has answers here:
Accessing an object property with a dynamically-computed name
(19 answers)
Closed 7 years ago.
Sorry that my title isn't very clear - didn't really know what else to call this.
Basically what I want to do is have a variable that is
"authData."+service+".displayName";
And turn that into
authData.theValueGivenToService.displayName;
Any idea on how to do that?
(I'm working with JavaScript/JQuery by the way - I should have mentioned that earlier)
If you are trying to access a property of object then do:
displayName = authData[service].displayName;
Related
This question already has answers here:
Accessing an object property with a dynamically-computed name
(19 answers)
Closed 6 years ago.
how to get data from object with define string?
case:
var data = [
{name:"Sharma",country:"India"},
{name:"Udin",country:"Indonesia"},
{name:"John Carter",country:"Mars"}
];
getData(data,"country");
function getData(data,element){
console.log(data[1].element);
}
i want to get country but result is undefinded, how to fix this?
You would need to know both the index and the property
function getData(data,index,element){
console.log(data[index][element]);
}
getData(data,1,"country");
function getData(data,element){
console.log(data[1][element]);
}
That's the correct way to access the value by using a key that is a string.
This question already has answers here:
Accessing an object property with a dynamically-computed name
(19 answers)
Closed 6 years ago.
I am making a new video game and I need help with a purchase feature.
I want to use local variables to "create" a global variable. For example:
function example(apple,banana) {
return unicorn.apple.banana.text
}
example(taco,burrito);
should return whatever unicorn.taco.burrito.text equals.
For this you need to use the Array Notation.
function example(apple, banana) {
return unicorn[apple][banana].text
}
example(taco, burrito);
Because you need to replace apple and banana, with their values.
This question already has answers here:
Use dynamic variable names in JavaScript
(19 answers)
Closed 7 years ago.
I have a question that I could not find the answer, or perhaps cannot phrase the way it should...
I would like to trick javascript's way of handling variables...
Let's say in php I could do something like:
$test['usr_'.$id]=826
But when I try to do the same in Javascript/jQuery:
$("#usr_rank_h").val('rank_'+id);
It will output rank_826 instead of the value of the var rank_826
The equivalent idiom in javascript is actually
var id = 826;
var test = {};
test['rank_'+id] = 826;
Which gives you back an object of the form
{
'rank_826': 826
}
PS: I'm not sure why you are using jQuery in this case, are you getting the id from an input ?
This question already has answers here:
Accessing an object property with a dynamically-computed name
(19 answers)
Get global variable dynamically by name string in JavaScript
(6 answers)
Closed 6 years ago.
I have an object that stores 3 variables called text0, text1 and text2 that in turn store one string each. I also have a variable that stores the index of the clicked button, so that if I click on the third button it should fetch the text2.
I was trying something like this:
p.text(myObj.text + btnNumber);
But so far all I get is NaN. Is it even possible to do this way? What am I missing?
Use named indexing of the object to get a variable named property:
p.text(myObj["text" + btnNumber]);
Javascript lets you index properties of an object as if it were a dictionary (indexed via string names).
This question already has answers here:
How to get objects value if its name contains dots?
(4 answers)
How can I access object properties containing special characters?
(2 answers)
Closed 9 years ago.
I have a property with name 'pp.phaseName' in an object 'Config'
Whenever I try to access it like Config.pp.phaseName, it's throwing error.
I've tried using Config.(pp.phaseName), Config."pp.phaseName" etc. but none was working.
Please help me on how to do this.
You have to use the square bracket notation.
Config["pp.phaseName"]