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javascriptternary

Weird ternary operator Javascript

I'm trying to understand how ternary operators work and I came across this example:

b.d >= mystr.length && (function1(b, a), a=0);

What does && mean? is it used like an AND operator? how does this translate to regular statement? What does the coma before a=0 mean? Thanks!

Solution

  • && is the AND operator. If the left of it is true, it's evaluate the right side (and return it). The , is the comma operator. (The comma operator evaluate both its sides, left to right, and return the right side). So this code is like:

    if (b.d>=mystr.lengh) {
 function1(b,a);
 a=0;
}

    (Except that your code return 0)

    (My native language is C, so maybe I'm wrong, but I think that in this case, javascript work like C)