Shoutbox

quote:

---

Originally posted by markee

quote:

---

Originally posted by phalanxii
I believe Math.abs(<boolean>) also does that.

---

This will give the absolute value of the number which is not what you want.  Boolean expressions are equivalent to 1 for true, 0 for null and -1 for false and thus you would have a problem where you couldn't tell the difference between true and false.  Even Spunky's code is incorrect because it misses the null possibility and false should be negate one not zero.  The proper methods would be either to use the parseInt method or multiply the boolean variable by 1 (or minus zero).  This is also the same when you try to convert a string to a number.

---

....multiplying -1 by 1 wouldn't produce 0 as he wanted, under your logic. false is equal to 0.

Hmm, this has turned into quite a discussion. To clarify what I was using this for, I have decided to make a GUI for my script, and I am using a few checkboxes. Of course, they have a true or false value, and I wanted to pass the values as numeric so that they would work with the existing scripting I had already done.  As I stated before, this now works using the code SpunkyLoveMuff provided

code:

---

myVar = myVar?1:0;

---

This seems to do exactly what I was looking for, I just need to use it for each checkbox that I have. Initially, I had tried multiplying the boolean value by 1 which didnt seem to do anything for me. I havent tried any of the other methods mentioned, as they first one worked for me

There is no need to actual convert between boolean and integer from what I can see... You can even set the checkboxes useing 1 or 0 instead of true or false

quote:

---

Originally posted by markee

quote:

---

Originally posted by phalanxii
I believe Math.abs(<boolean>) also does that.

---

This will give the absolute value of the number which is not what you want.  Boolean expressions are equivalent to 1 for true, 0 for null and -1 for false and thus you would have a problem where you couldn't tell the difference between true and false.  Even Spunky's code is incorrect because it misses the null possibility and false should be negate one not zero.  The proper methods would be either to use the parseInt method or multiply the boolean variable by 1 (or minus zero).  This is also the same when you try to convert a string to a number.

---

er what boolean is either 1 (true) OR 0 (false) theres no -1, its its null its not a boolean, its null

Math.abs does exactly what he wants

code:

---

Math.abs(true) == 1
Math.abs(false) == 0
Math.abs(null) == 0
Math.abs(undefined) == NaN

---

Why do you all make it so difficult? Multiplying a boolean with 1 won't cause any troubles and is the easiest method to use!

It simply depends on your preference. I just like the multiplying method, but the other ways will do just the same. It's up to you!

quote:

---

Originally posted by -dt-

quote:

---

Originally posted by markee

quote:

---

Originally posted by phalanxii
I believe Math.abs(<boolean>) also does that.

---

This will give the absolute value of the number which is not what you want.  Boolean expressions are equivalent to 1 for true, 0 for null and -1 for false and thus you would have a problem where you couldn't tell the difference between true and false.  Even Spunky's code is incorrect because it misses the null possibility and false should be negate one not zero.  The proper methods would be either to use the parseInt method or multiply the boolean variable by 1 (or minus zero).  This is also the same when you try to convert a string to a number.

---

er what boolean is either 1 (true) OR 0 (false) theres no -1, its its null its not a boolean, its null

Math.abs does exactly what he wants

code:

---

Math.abs(true) == 1
Math.abs(false) == 0
Math.abs(null) == 0
Math.abs(undefined) == NaN

---

---

My bad, I always thought it was -1.  Would make more sense to differentiate null and false IMO

i've never seen null in any boolean anywhere

quote:

---

Originally posted by Voldemort
i've never seen null in any boolean anywhere

---

quote:

---

Originally posted by Google
A logical truth value. The two possible Boolean values are true and false .

---

Simple answer... Null isn't boolean (I know you know that )

quote:

---

Originally posted by Google
A null value tells you the value for that row is either missing, unknown, not yet know or inapplicable.

---