single return of ternary operator

Question

I wonder if possible to write ternary operator for single return. I tried google online, but couldn't find an answer. or it doesnot called ternary operator??

Thank you very much for your advice.

If(A == 1) execute_function(); into A == 1 ? execute_function() //???Possible???

Solution 1

yes:

(exists == 1) ? execute_function() : false;

runs function if exists is true else wont

Added: Doing just like following would be better:

if( A == 1 ) {
  execute_function();
}

As using ternary operator in above case is not so fruitful, as you are checking only for the true side of the condition and do not care about what's in the false side.

Solution 2

Here is the shortest way.

A == 1 && execute_function();

Solution 3

condition ? (runTrue) : (runFalse);

is available in javascript.

https://developer.mozilla.org/en-US/docs/JavaScript/Reference/Operators/Conditional_Operator

Solution 4

As someone already mentioned, A == 1 && execute_function(); is the shortest. However, another option is to use a single line if statement:

if( A == 1 ) execute_function();

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Comments

[Sudhir Bastakoti]

@Till yes, you need to use false side as well, you can use blank string like '', or 0 or false

[Admin]

Had exactly the same dilema and figured out (statement) ? true : null; works just as fine

[Lloyd]

I still argue that in this case ternary just isn't appropriate, you're not gaining anything by using it.

[Sudhir Bastakoti]

@Lloyd yes you're correct, have updated my answer accordingly