Timeline for Conway's Game of Life in JavaScript
Current License: CC BY-SA 3.0
18 events
| when toggle format | what | by | license | comment | |
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| Jan 8, 2014 at 11:45 | vote | accept | SaggingRufus | ||
| Jan 8, 2014 at 1:31 | comment | added | Superbest |
This is a very good answer which touches on several key thing in programming that beginners often end up learning the hard way (I know I did). It might be wroth mentioning that the trick with deferring updates is an example of double buffering, with the issue arising from use of only a single buffer (the buffer here is the array which stores the board). Also, personally I like to use the modulo trick, combined with an if (within_bounds(x, y)) kind of conditional to handle edges and corners.
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| Jan 8, 2014 at 0:08 | comment | added | David Conrad | @rolfl Ah, thanks, and thanks for the link. | |
| Jan 8, 2014 at 0:02 | comment | added | rolfl | @David, Google's Javascript style guide recommends against it (not supported in IE). | |
| Jan 8, 2014 at 0:00 | comment | added | David Conrad |
You might be able to get away with using const DIMENSION, instead of var, but I'm not certain how widespread the support for it is yet.
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| Jan 7, 2014 at 21:41 | comment | added | Dave Jarvis | @rolfl: Ah! I misunderstood the implications of what you wrote. Thanks for the update. :-) | |
| Jan 7, 2014 at 19:19 | comment | added | rolfl |
@DaveJarvis that is correct, and it is not supposed to. DIMENSION is 30, and since the array index is 0-based, the largest value we ever want is 29. We want to generate values from 0 to 29 inclusive, so Math.floor(Math.random() * 30) is what we want to do (Note DIMENSION is 30, and not 29 like you have in your JFiddle)
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| Jan 7, 2014 at 18:54 | comment | added | SaggingRufus | Thanks! this is by far the most helpful to date. The only reason I made the whole board is so that I could visualise my starting bacteria for the runs where I comment out the auto generate. I also realize that would never hit 29 in the random number generator. I figured that it wouldnt matter becausea full board would just revert to an empty board next turn. I really like the buddy idea! Thanks again! | |
| Jan 7, 2014 at 16:39 | comment | added | rolfl | @default.kramer - thanks, and I changed the formatting to make it 'obvious' | |
| Jan 7, 2014 at 16:38 | history | edited | rolfl | CC BY-SA 3.0 |
Incorporate changes suggested by default.kramer, AJMansfield, and Danny
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| Jan 7, 2014 at 16:34 | comment | added | default.kramer | There are some typos in the buddy table, for example [0,-1] appears twice. | |
| Jan 7, 2014 at 16:32 | comment | added | rolfl | @AJMansfield - copy-paste from the OP's code. There is no other reason... will edit. | |
| Jan 7, 2014 at 16:31 | comment | added | AJMansfield |
Also, why is there a +0 in Math.floor((Math.random()*dimension)+0);?
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| Jan 7, 2014 at 16:29 | comment | added | AJMansfield | You don't have to actually process the entire board before writing the values back; There's a way to do it where you store a row's values in an array and use that array to get the old values when computing the next row. | |
| Jan 7, 2014 at 14:38 | history | edited | rolfl | CC BY-SA 3.0 |
Noticed big bug in code.
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| Jan 7, 2014 at 14:17 | history | edited | rolfl | CC BY-SA 3.0 |
Fix for issues with mis-reading version of CGOL
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| Jan 7, 2014 at 14:02 | history | edited | rolfl | CC BY-SA 3.0 |
Somehow had index 3 instead of index 1 ... hmmmm
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| Jan 7, 2014 at 13:52 | history | answered | rolfl | CC BY-SA 3.0 |