Hot to construct dynamic language variable

Asked May 01 '20 at 07:00

Active May 01 '20 at 07:02

Viewed 11 times

I have this language array:

var messages = {
adult1:'Adult',
adult2:'Adults'
}

and this function

//id = 'adult';
//v = 2;

function changer(id,v){
var label = '';
label = eval(id+v);
console.log(messages.label);
//I want to see 'Adults' label
}

but the result is ReferenceError: adult2 is not defined

How can I concate both variables and create a new one that will print the variable from messages array

Thank you in advance

edited May 01 '20 at 07:02

asked May 01 '20 at 07:00

Europeuser

Don't, use bracket notation to look up the property you need instead – CertainPerformance May 01 '20 at 07:01
can you please give me example with my code, thanks – Europeuser May 01 '20 at 07:01
Why you closed my question mate, that dublicate is not helping at all ! – Europeuser May 01 '20 at 07:12
When you have a string and you want to look up a property of an object, where the property is that string, use bracket notation - eg `obj[foo + bar]` will look up whatever property is the `foo` variable concatenated with the `bar` variable. The same thing will work here – CertainPerformance May 01 '20 at 07:14

0 Answers0