Re: Cardinals
On 2020-01-03 01:07, Darren Duncan wrote: Todd, nothing you said disagrees with what I said, and I referenced that same Wikipedia article. (Though perhaps I could have been more accurate in saying a cardinal is characterized by an integer rather than saying it is an integer with a particular interpretation.) In particular, the article is explicit that there is no limit to how many cardinal numbers there are. So saying cardinal number is equivalent to a fixed size 32-bit integer is wrong, which is my point. (Also, negative quantities/counts are a common concept, but I can accept that the formal definition of cardinal excludes them.) -- Darren Duncan Hi Darren, I was just trying to come up with a type that Raku would not think was a negative number if the first bit was set. uint16 and uint32 are perfect for this. No uint8 though, but BYTE and Buf work for that. I personally had never heard the term Cardinal until I used Modula2. A cardinal was always called "counting numbers" in publik skool, probably because they wanted to avoid the jokes about red birds. :-) -T
Re: Cardinals
Todd, nothing you said disagrees with what I said, and I referenced that same Wikipedia article. (Though perhaps I could have been more accurate in saying a cardinal is characterized by an integer rather than saying it is an integer with a particular interpretation.) In particular, the article is explicit that there is no limit to how many cardinal numbers there are. So saying cardinal number is equivalent to a fixed size 32-bit integer is wrong, which is my point. (Also, negative quantities/counts are a common concept, but I can accept that the formal definition of cardinal excludes them.) -- Darren Duncan On 2020-01-03 12:03 a.m., Todd Chester via perl6-users wrote: On 2020-01-02 22:19, Darren Duncan wrote: On 2020-01-02 10:01 a.m., ToddAndMargo via perl6-users wrote: How do I do a 32 bit unsigned integer (cardinal)? I have a situation where I need to be able to have the first bit be a one and not have Raku think it is a negative number. Why do you use the term "cardinal" to refer to a 32 bit unsigned integer? The term "cardinal" in practice is just an integer/number of any magnitude with the added semantics of representing a quantity/count of something in contrast to say an ordinal position or name of something. Cardinals can't be negative. Think of them as counting numbers The term definitely does not represent a fixed-size number and it can also be negative. You are confusing a cardinal with an integer. An easy mistake to make -- Darren Duncan Hi Darren, Cardinal number https://simple.wikipedia.org/wiki/Cardinal_number "Cardinal numbers (or cardinals) are numbers that say how many of something there are, for example: one, two, three, four, five, six. They are sometimes called counting numbers. " Cardinal Numbers https://www.mathsisfun.com/numbers/cardinal-ordinal-nominal.html "A Cardinal Number says how many of something there are, such as one, two, three, four, five. A Cardinal Number answers the question 'How Many?'" Modula-2 Basic Data Types https://www.modula2.org/sb/env/index75.htm CARDINAL 16-bit compiler: 2 bytes 0 to 65535 32-bit compiler: 4 bytes 0 to 4,294,967,295 I was pretty good at Modula2 back in the day, :-) -T
Re: Cardinals
On 2020-01-02 22:19, Darren Duncan wrote: On 2020-01-02 10:01 a.m., ToddAndMargo via perl6-users wrote: How do I do a 32 bit unsigned integer (cardinal)? I have a situation where I need to be able to have the first bit be a one and not have Raku think it is a negative number. Why do you use the term "cardinal" to refer to a 32 bit unsigned integer? The term "cardinal" in practice is just an integer/number of any magnitude with the added semantics of representing a quantity/count of something in contrast to say an ordinal position or name of something. Cardinals can't be negative. Think of them as counting numbers The term definitely does not represent a fixed-size number and it can also be negative. You are confusing a cardinal with an integer. An easy mistake to make -- Darren Duncan Hi Darren, Cardinal number https://simple.wikipedia.org/wiki/Cardinal_number "Cardinal numbers (or cardinals) are numbers that say how many of something there are, for example: one, two, three, four, five, six. They are sometimes called counting numbers. " Cardinal Numbers https://www.mathsisfun.com/numbers/cardinal-ordinal-nominal.html "A Cardinal Number says how many of something there are, such as one, two, three, four, five. A Cardinal Number answers the question 'How Many?'" Modula-2 Basic Data Types https://www.modula2.org/sb/env/index75.htm CARDINAL 16-bit compiler: 2 bytes 0 to 65535 32-bit compiler: 4 bytes 0 to 4,294,967,295 I was pretty good at Modula2 back in the day, :-) -T
Re: Cardinals
On 2020-01-02 10:01 a.m., ToddAndMargo via perl6-users wrote: How do I do a 32 bit unsigned integer (cardinal)? I have a situation where I need to be able to have the first bit be a one and not have Raku think it is a negative number. Why do you use the term "cardinal" to refer to a 32 bit unsigned integer? The term "cardinal" in practice is just an integer/number of any magnitude with the added semantics of representing a quantity/count of something in contrast to say an ordinal position or name of something. The term definitely does not represent a fixed-size number and it can also be negative. -- Darren Duncan
Re: Cardinals
On 2020-01-02 10:14, Tobias Boege wrote: On Thu, 02 Jan 2020, ToddAndMargo via perl6-users wrote: Hi All, “He who asks is a fool for five minutes, but he who does not ask remains a fool forever.” ― Mark Twain This would be my five minutes. I will live. How do I do a 32 bit unsigned integer (cardinal)? I have a situation where I need to be able to have the first bit be a one and not have Raku think it is a negative number. It's called uint32: https://docs.perl6.org/language/nativetypes#index-entry-uint32 Hi Tobias, Perfect! Thank you! -T p6 'my uint16 $x = 0x8765; my int16 $y = 0x8765; say $x.base(0x10); say $y.base(0x10);' 8765 -789B p6 'my uint16 $x = 0x8765; $x += 0xFF; say $x.base(0x10);' 8864 p6 'my uint16 $x = 0x8765; my int16 $y = $x +| 0x00; say $x.base(0x10); say $y.base(0x10);' 8765 -789B p6 'my uint16 $x = 0x4ABC; $x = $x +< 1; say $x.base(0x10);' 9578 p6 'my uint16 $x = 0x4ABC; $x += $x; say $x.base(0x10);' 9578
Re: Cardinals
On Thu, 02 Jan 2020, ToddAndMargo via perl6-users wrote: > Hi All, > > “He who asks is a fool for five minutes, but he who > does not ask remains a fool forever.” > ― Mark Twain > > This would be my five minutes. I will live. > > How do I do a 32 bit unsigned integer (cardinal)? I > have a situation where I need to be able to have the > first bit be a one and not have Raku think it is > a negative number. > It's called uint32: https://docs.perl6.org/language/nativetypes#index-entry-uint32 -- "There's an old saying: Don't change anything... ever!" -- Mr. Monk
Cardinals
Hi All, “He who asks is a fool for five minutes, but he who does not ask remains a fool forever.” ― Mark Twain This would be my five minutes. I will live. How do I do a 32 bit unsigned integer (cardinal)? I have a situation where I need to be able to have the first bit be a one and not have Raku think it is a negative number. Many thanks, -T
