Can you modify a dictionary inside the ?: statement and then return the updated dictionary in the same block? For example, something like this:
a > b ? <dict['c'] = 'I'm changed', return dict> : <some other code>;I am looking to implement this functionality within the map function. For instance:
var a = [...]
a.map((itm) => return itm.isComposite ? itm[key] = transform(itm[data]); return itm : transform(itm))
Absolutely, it can be done using the comma operator:
a > b ? (dict['c'] = "I've been changed", dict) : <some other code>;
The comma operator assesses all of its elements and returns the value of the last (rightmost) one.
Nevertheless, a proper if statement may offer a more easily readable solution in this case, which is why opting for it over creating a conditional ("ternary") expression would be recommended.
Using the comma operator is sufficient in this case, eliminating the need for the return keyword.
var result = (a > b
? (dict['c'] = "I've been updated", dict)
: <some other code> );
If you wish to return the result, it should be done outside of the expression:
return (a > b
? (dict['c'] = "I've been updated", dict)
: <some other code> );
However, personally, I find using if statements a better approach for this scenario. Long ternary expressions can be challenging to comprehend at first glance.
Here is a simple example:
You can use the ternary operator to shorten the code like this:
var result = a > b ? methodOne() : methodTwo();
The methods methodOne() and methodTwo() are used to return the result.
I trust that this explanation will be beneficial for you.
If you need to accomplish a similar task, consider using the following code snippet:
b < a ? (x) => {x['y'] = 'I was modified'; return obj;}(obj): <some alternative code>;
>> let obj = {};>> 4 > 1 ? ((d) => {d.b = 4; return d;}) (obj) : 6;
>> Object {b: 4}
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