Is a number between two numbers?

ID:1378462
 
Sep 16 2013, 2:11 pm
How do you check if a number is within two numbers (including the bounds)?

Most sensible people probably use this:
n >= lower && n <= upper


But what they probably don't know is that DM has an "in-to" ternary operator. It's a ternary operator because it takes three values and gives you one in return, like the ?: operator. Most arithmetic operators are binary operators, like X + Y.

Here's how "in-to" is used.
(n in lower to upper)

It's that easy! It returns true or false, just like the original method.
Sep 17 2013, 8:11 am
I had no idea you could do this.
Sep 17 2013, 8:21 am
I knew. Cuz SSX.
Sep 17 2013, 9:42 am
The "in" operator has a lower order than the logic gates, so it's best to keep the whole expression in parentheses, like you would when using "something in list".
Sep 17 2013, 12:17 pm
I knew you could do this in a for loop, didn't know you could do it like that...

but is it faster?
Sep 17 2013, 12:20 pm
In response to Magicsofa
It doesn't matter much, but in my tests, it's up to 0.2 seconds per million tests faster than using 3 operators.
Sep 17 2013, 1:03 pm
Fascinating.
Sep 17 2013, 2:42 pm
Okay, that's cool.
Sep 17 2013, 4:25 pm
pls red book pls
Sep 17 2013, 4:38 pm
In response to Super Saiyan X
People don't read things unless they're on the front of the forums.
Sep 17 2013, 4:54 pm
In response to Super Saiyan X
Super Saiyan X wrote:
pls red book pls

war i learnd @
Sep 17 2013, 5:16 pm
In response to Super Saiyan X
Super Saiyan X wrote:
pls red book pls

I was just thinking, "this is some Red Book type [stuff] right here."
Sep 26 2013, 9:22 am
I like this. :)