What's the meaning of ? and : in this function?

Question

I'm just started with google apps script and a'd like to know what is the meaning or the function of ? and : in this function. Thanks a lot for the help.

function comparar(a, b) {
if (b[1] === a[1]) {
    return 0;
}
else {
    return (b[1] < a[1]) ? -1 : 1;
}

}

See also: https://stackoverflow.com/q/3312786/6073774 – Blair Fonville Mar 10 '18 at 08:12 — Blair Fonville, Mar 10 '18 at 08:12

score 1 · Accepted Answer · answered Mar 10 '18 at 08:08

1

It is named Ternary Operator.

In computer programming, ?: is a ternary operator that is part of the syntax for basic conditional expressions in several programming languages. It is commonly referred to as the conditional operator, inline if (iif), or ternary if. An expression a ? b : c evaluates to b if the value of a is true, and otherwise to c.

In your case if b[1] < a[1] then your function will return -1 otherwise 1

https://en.wikipedia.org/wiki/%3F:

answered Mar 10 '18 at 08:08

Oleksandr Riznyk

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Do not answer duplicates in the duplicate - if you have valuable information to add, do so as an answer the original question. – tehhowch Mar 10 '18 at 15:58
Thank you very much. Concise and simple. Thanks. Sorry for duplicate a question. – Mario Moreno González Mar 11 '18 at 08:52

What's the meaning of ? and : in this function?

1 Answers1