Computer Science Canada Quick question: What is # used for? |
| Author: | Timothy Willard [ Fri Jun 28, 2013 10:04 pm ] |
| Post subject: | Quick question: What is # used for? |
I can't find it anywhere in the Turing reference (not saying it isn't there, just saying I don't know where to look for it). I know it is used in Turing for something, but I don't know what. Can anyone help out here? |
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| Author: | Tony [ Fri Jun 28, 2013 10:06 pm ] |
| Post subject: | RE:Quick question: What is # used for? |
example? |
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| Author: | Dreadnought [ Fri Jun 28, 2013 10:17 pm ] |
| Post subject: | Re: Quick question: What is # used for? |
cheat |
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| Author: | Timothy Willard [ Sat Jun 29, 2013 7:41 pm ] |
| Post subject: | Re: Quick question: What is # used for? |
The location I found it was in this link:http://compsci.ca/v3/viewtopic.php?t=31463. I do realize that in this situation is sets a base for the integers, but later on down the topic it seems to translate any variable into its hexadecimal representation. I originally knew nothing about it, but I did some research (and testing) after posting this topic so I now have a vague idea about #. I am still curious as to is limits, and when specifically I can use it (for example, is there anyway to get put to display in base 16? When I type put #"a" I get Turing's keycode for a, 97, but that is in base 10.) I only know what # does vaguely, and I am looking for more specific information. |
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| Author: | Dreadnought [ Sat Jun 29, 2013 9:12 pm ] |
| Post subject: | Re: Quick question: What is # used for? |
Timothy Willard wrote:
OMG, someone was trying to learn from my code! I'm not sure if I should be honoured or ashamed (I did some messy stuff in that post). As I posted earlier, # is a type cheat. (read the Turing documentation for "cheat" if you want to know as much as possible) cheat converts the bit representation of one type into another. Ex: the character 'a' has the bit representation 1100001 which is the same as the integer (or natural number) 97 # is a short form which converts to the nat type. If we specify a base in front of #, like in the case of B#N, then # will produce the nat with representation N in base B. So # does not convert to the hexadecimal representation, 16#<hex> evaluates to the nat with hexadecimal representation <hex>. Also Timothy Willard wrote: is there anyway to get put to display in base 16?
Look up intstr and/or natstr. |
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