Question

I have an array with boolean values:

var array = [false, false, false];

I want to execute a function only if all the elements are false.

I tried this and it didn’t work, because it would execute the function for every false:

for(var i = 0; i < array.length; i++){
   if(array[i] === false){
      functionA();   //This function ran at every false
   }else{
      //Do something else
   }
}

Answer 1

if (array.indexOf(true) == -1) {
    functionA();
}

The indexOf function returns the first index at which a given element can be found in the array, or -1 if it is not present.