3 ms·

A signed 64-bit integer with 2s complement representation still only has 264 unique values. 265 for a signed representation, while not stupid, is a bit out ther

A signed 64-bit integer with 2s complement representation still only has 264 unique values. 265 for a signed representation, while not stupid, is a bit out there.

deathanatos 11y ago
readers: The parent poster is saying that it has 2⁶⁴ unique and 2⁶⁵ unique values; the formatting is wonky. ioquatix: You might want to edit your post to indicate exponentiation. It took me quite a moment to realize you meant that a signed 64-bit int represented in 2s complement has two-to-the-sixty-fourth values, not two hundred and sixty four. I'm guessing you used two asterisks which HN mistook as a zero-length italics?
- moron4hire 11y ago
  Whoa, how did you do it?
  - logn 11y ago
    Unicode https://en.wikipedia.org/wiki/Unicode_subscripts_and_superscripts https://en.wikipedia.org/wiki/Unicode_subscripts_and_supersc...
  - deathanatos 11y ago
    Unicode has superscript versions of all of the arabic numerals. "⁶" here is U+2076, "SUPERSCRIPT SIX"[1]; there's not any real "formatting" happening in my post. (Because HN doesn't support superscript, and two asterisks is a pain as I noted, and ^ gets confused by programmers for xor…) If you happen to be on OS X, you can type Control+Command+Space in most contexts, and get a popup that will let you select special characters, like the above, emoji, etc. It even has a decent search box. If you're on Linux, you can set a key as a Compose key (I use my right alt key); the default set of compose sequences includes superscript six as Compose, ^, 6. You can also input arbitrary unicode into most contexts if the app is using GTK with Ctrl+Shift+u, followed by the hexadecimal code point, followed by space. On Windows, I have no idea. [1]: http://www.fileformat.info/info/unicode/char/2076/index.htm http://www.fileformat.info/info/unicode/char/2076/index.htm
ioquatix 11y ago
I guess I can't edit my post but yeah, it was supposed to be 2^64 and 2^65 :)

A signed 64-bit integer with 2s complement representation still only has 264 unique values. 265 for a signed representation, while not stupid, is a bit out there.

deathanatos 11y ago

readers: The parent poster is saying that it has 2⁶⁴ unique and 2⁶⁵ unique values; the formatting is wonky. ioquatix: You might want to edit your post to indicate exponentiation. It took me quite a moment to realize you meant that a signed 64-bit int represented in 2s complement has two-to-the-sixty-fourth values, not two hundred and sixty four. I'm guessing you used two asterisks which HN mistook as a zero-length italics?

moron4hire 11y ago
Whoa, how did you do it?
- logn 11y ago
  Unicode https://en.wikipedia.org/wiki/Unicode_subscripts_and_superscripts https://en.wikipedia.org/wiki/Unicode_subscripts_and_supersc...
- deathanatos 11y ago
  Unicode has superscript versions of all of the arabic numerals. "⁶" here is U+2076, "SUPERSCRIPT SIX"[1]; there's not any real "formatting" happening in my post. (Because HN doesn't support superscript, and two asterisks is a pain as I noted, and ^ gets confused by programmers for xor…) If you happen to be on OS X, you can type Control+Command+Space in most contexts, and get a popup that will let you select special characters, like the above, emoji, etc. It even has a decent search box. If you're on Linux, you can set a key as a Compose key (I use my right alt key); the default set of compose sequences includes superscript six as Compose, ^, 6. You can also input arbitrary unicode into most contexts if the app is using GTK with Ctrl+Shift+u, followed by the hexadecimal code point, followed by space. On Windows, I have no idea. [1]: http://www.fileformat.info/info/unicode/char/2076/index.htm http://www.fileformat.info/info/unicode/char/2076/index.htm

ioquatix 11y ago

I guess I can't edit my post but yeah, it was supposed to be 2^64 and 2^65 :)