A simple for loop question

Question

Hi
Lets say I have an array with boolean values in it:
my_array = [ false , false , false ]
My question is:
How do you make a function to check, if the value is all
false, than do this (not only one but all false than trigger a
function)
thank you

Answer 1

The 350Z,
> Lets say I have an array with boolean values in it:
> my_array = [ false , false , false ]
I'm with ya.
> My question is:
> How do you make a function to check, if the value is
> all false, than do this (not only one but all false than
> trigger a function)
Your subject line already states the answer. A for loop
would come in
handy. :) In your case, you're looking for all three values
to be false.
If even a mere one of them is true, the whole result doesn't
count. Let's
write a function that returns true if all three are false,
and returns false
if any are true.
function checkWholeArray(arr:Array):Boolean {
for (var n:Number = 0; n < arr.length; n++) {
if (arr[n] == true) {
return false;
return true;
To use this function, you could call it and supply your
array as the
parameter ...
checkWholeArray(my_array);
... and since that resolves to either true or false, you
could even use that
expression in an if statement.
if (checkWholeArray(my_array)) {
// do something
} else {
// do something else
The for loop simply steps through each element in the
passed-in array.
If the current element is true, then the desired outcome --
that all
elements are false -- is a loss, so the function returns
false and
immediately stops (the return statement always exits the
function at that
point). Otherwise, the for loop finishes, and the function
returns true.
David
stiller (at) quip (dot) net
Dev essays:
http://www.quip.net/blog/
"Luck is the residue of good design."