Timeline for Calculating pi using bash
Current License: CC BY-SA 3.0
10 events
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| Apr 30, 2020 at 4:36 | comment | added | dimo414 |
I'd also suggest SCALE=${1:?} or SCALE=${1:-4} to fail-fast or fall-back to a default value if a scale isn't passed on the command line.
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| Apr 30, 2020 at 4:33 | comment | added | dimo414 | Regarding "I don't know of a bash style guide" there's the Google Shell Style Guide; it's not perfect but it's a good starting point. | |
| May 23, 2017 at 12:41 | history | edited | CommunityBot |
replaced http://stackoverflow.com/ with https://stackoverflow.com/
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| Jun 24, 2015 at 8:14 | vote | accept | insanikov | ||
| Jun 23, 2015 at 17:31 | history | edited | Edward | CC BY-SA 3.0 |
simplified echo statements by removing `scale` from all but the calculation for delta
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| Jun 22, 2015 at 13:52 | comment | added | insanikov | I understand it now, I would have never come up with this. Thank you for the explanation. | |
| Jun 21, 2015 at 21:27 | history | edited | Edward | CC BY-SA 3.0 |
added more explanation of how it works with sample output
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| Jun 21, 2015 at 21:08 | comment | added | Edward |
It's a bit subtle. Basically, a value of 0.001 (=1e-3) with a scale of 3 is nonzero, but a value of 0.0005 (=5e-4) is considered to be equal to zero at a scale of 3, so when the next term becomes less than smaller than 1e-${SCALE}, the printable part of ${PI} is unlikely to change except in the least significant digit. A refinement would be to use ${SCALE}+1 in the while loop but it doesn't make much difference and this is slightly easier to understand.
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| Jun 21, 2015 at 18:17 | comment | added | insanikov | I really appreciate the suggestions, but I don't completely understand how you've implemented the stopping feature, SCALE simply is how many numbers exist after the decimal point. There's probably something I'm not seeing here... | |
| Jun 21, 2015 at 18:07 | history | answered | Edward | CC BY-SA 3.0 |