# Fuzzy Time (#99) - Results **URL:** \ **Category:** Ruby\ **Created:** [November 7, 2006, 10:55am UTC](https://www.ruby-forum.com/t/fuzzy-time-99-results/74760 "2006-11-07T10:55:19Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![phrogz](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/p/2acd7d/32.png) [@phrogz](https://www.ruby-forum.com/u/phrogz)\ **Post date:** [November 7, 2006, 10:55am UTC](https://www.ruby-forum.com/t/fuzzy-time-99-results/74760/1 "2006-11-07T10:55:19Z")
Quiz Summary coming ‘soon’. Until then: Following are the results I obtained from running my test script against everyone’s submissions. (I had to fix minor bugs in a few to make them work.) After that is the (updated) test script. The script runs a full day of time against the class, advancing the time uniformly by different numbers of seconds. For each result, the first line reports whether the class was generally fast or slow. (The maximum possible variation is 50% fast or slow.) The second line is the result of recording, each time the fuzzy time changed, how many minutes ahead or behind the actual time the change occurred. Ideally, you should see the same percentages spread along the whole range. I didn’t test Louis Scoras’ submission, because it took a (good, but) different track for displaying the time, so I knew it wouldn’t pass any of my tests. Loaded suite GavinKistner\_1 Started 2 second advance: 3.3% behind, 19.7% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 1.4% 6.2% 10% 12% 10% 11% 21% 9.7% 17% 6 second advance: 7.0% behind, 11.5% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0.7% 5.6% 15% 16% 15% 13% 11% 13% 9.7% 2.1% 17 second advance: 11.3% behind, 12.8% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 2.1% 9.0% 12% 10% 12% 8.3% 13% 11% 7.6% 5.5% 9.0% 30 second advance: 12.8% behind, 12.9% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 5.5% 13% 13% 7.6% 11% 9.0% 10% 10% 6.9% 9.7% 3.4% 47 second advance: 14.2% behind, 11.6% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 7.6% 14% 11% 11% 10% 12% 6.2% 10% 5.5% 5.5% 5.5% 60 second advance: 10.7% behind, 16.0% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 5.6% 9.7% 6.9% 13% 14% 9.0% 6.3% 5.6% 11% 5.6% 13% 65 second advance: 12.1% behind, 16.8% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 11% 9.0% 12% 7.6% 6.3% 6.9% 6.3% 13% 11% 9.0% 6.9% 120 second advance: 17.1% behind, 11.8% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 19% 0% 19% 0% 19% 0% 15% 0% 12% 0% 290 second advance: 16.1% behind, 19.5% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 7.6% 6.9% 6.2% 3.4% 7.6% 5.5% 6.2% 6.2% 6.9% 5.5% 6.2% ======= BenGiddings\_1.rb \ expected but was \. It is 07:45, the clock displayed “07:3~”, but it should only display one of [“07:4~”, “07:5~”]. (Last time I asked, it said it was 07:3~.) ======= Loaded suite CameronPope\_1 Started 2 second advance: 0.0% behind, 38.1% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0.7% 0% 0% 0% 0.7% 0% 9.6% 48% 40% 6 second advance: 0.0% behind, 31.7% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0.7% 0% 0% 0.7% 12% 32% 36% 18% 17 second advance: 1.4% behind, 19.0% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0.7% 4.1% 2.1% 9.6% 18% 19% 25% 16% 4.1% 30 second advance: 3.9% behind, 14.7% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0.7% 0.7% 7.6% 2.8% 8.3% 14% 22% 17% 13% 8.3% 4.8% 47 second advance: 6.9% behind, 12.6% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 2.1% 4.1% 6.2% 6.2% 19% 16% 12% 12% 8.9% 9.6% 3.4% 60 second advance: 13.0% behind, 9.2% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 12% 7.5% 8.2% 10% 15% 12% 14% 8.9% 8.9% 2.7% 0.7% 65 second advance: 11.1% behind, 10.6% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 11% 4.8% 5.5% 17% 6.9% 19% 11% 10% 7.6% 3.4% 1.4% 120 second advance: 18.5% behind, 10.6% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 15% 0% 22% 0% 19% 0% 18% 0% 5.6% 0% 290 second advance: 26.5% behind, 11.1% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 15% 9.6% 6.6% 4.4% 2.9% 3.7% 5.1% 3.7% 4.4% 0% 0% ======= DamienPetrelli\_1 \ expected but was \. It is 02:26, the clock displayed “12:5~”, but it should only display one of [“02:2~”, “02:3~”]. (Last time I asked, it said it was .) ======= Loaded suite DanielLucraft\_1 Started 2 second advance: 8.1% behind, 16.0% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0.7% 11% 7.6% 9.7% 13% 11% 9.7% 9.7% 9.0% 8.3% 10% 6 second advance: 7.6% behind, 18.8% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 9.7% 9.7% 8.3% 6.9% 9.0% 12% 8.3% 12% 12% 11% 17 second advance: 9.3% behind, 15.6% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 12% 11% 9.0% 9.0% 8.3% 14% 9.7% 7.6% 9.0% 9.7% 30 second advance: 7.8% behind, 16.6% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0.7% 8.3% 12% 6.9% 12% 9.0% 12% 10% 9.0% 10% 9.0% 47 second advance: 8.6% behind, 14.1% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 10% 8.9% 6.2% 12% 14% 10% 10% 7.5% 12% 7.5% 60 second advance: 6.7% behind, 19.4% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 8.3% 9.0% 7.6% 6.3% 9.0% 11% 14% 10% 13% 12% 65 second advance: 8.8% behind, 16.1% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 8.3% 12% 12% 12% 11% 7.6% 6.2% 9.0% 6.9% 13% 120 second advance: 6.9% behind, 20.7% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 10% 0% 16% 0% 18% 0% 21% 0% 23% 0% 11% 290 second advance: 7.0% behind, 16.1% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 7.3% 9.5% 14% 12% 8.0% 12% 10% 4.4% 7.3% 4.4% 2.9% ======= Loaded suite JeremyHinegardner\_1 Started 2 second advance: 0.0% behind, 42.7% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0% 0.7% 0% 0% 0% 0.7% 20% 78% 6 second advance: 0.0% behind, 38.3% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0% 0% 0.7% 0% 1.4% 9.7% 51% 37% 17 second advance: 0.0% behind, 31.5% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0% 0% 2.1% 0.7% 17% 29% 30% 21% 30 second advance: 0.0% behind, 29.5% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0.7% 0% 1.4% 8.3% 17% 32% 26% 15% 47 second advance: 0.8% behind, 20.2% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0.7% 5.5% 13% 19% 21% 21% 12% 7.5% 60 second advance: 0.8% behind, 24.7% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0.7% 0.7% 2.8% 4.1% 7.6% 14% 19% 23% 21% 6.9% 65 second advance: 1.5% behind, 21.2% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0.7% 1.4% 2.8% 9.7% 9.0% 17% 17% 21% 16% 5.5% 120 second advance: 6.9% behind, 10.4% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 10% 0% 17% 0% 34% 0% 30% 0% 7.6% 0% 290 second advance: 8.4% behind, 13.8% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 9.2% 11% 12% 11% 13% 11% 7.7% 6.3% 7.0% 4.2% 0% ======= Loaded suite MarcelWard\_1 Started 2 second advance: 7.2% behind, 17.6% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 6.2% 6.8% 8.2% 7.5% 11% 4.1% 17% 14% 14% 11% 6 second advance: 5.4% behind, 18.5% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 4.2% 4.9% 6.9% 7.6% 10% 12% 16% 15% 9.0% 14% 17 second advance: 8.1% behind, 15.2% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 8.2% 6.2% 4.8% 11% 16% 12% 8.2% 14% 10% 9.6% 30 second advance: 7.2% behind, 13.7% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 6.9% 5.5% 7.6% 14% 11% 12% 18% 9.0% 10% 4.1% 47 second advance: 7.5% behind, 16.1% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0.7% 6.2% 9.0% 7.6% 12% 10% 9.0% 15% 12% 12% 6.2% 60 second advance: 10.6% behind, 13.5% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 4.1% 10% 9.7% 9.0% 13% 8.3% 12% 12% 7.6% 9.7% 4.1% 65 second advance: 7.7% behind, 17.8% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 4.8% 4.8% 9.7% 7.6% 6.9% 9.0% 9.7% 13% 16% 12% 6.2% 120 second advance: 6.4% behind, 14.4% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 14% 0% 14% 0% 29% 0% 26% 0% 17% 0% 1.4% 290 second advance: 10.1% behind, 16.8% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 8.4% 9.8% 9.8% 12% 7.7% 9.1% 10% 10% 4.2% 4.9% 0.7% ======= Loaded suite PaoloNegri\_1 Started 2 second advance: 7.8% behind, 9.5% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 5.5% 8.3% 8.3% 17% 17% 18% 10% 10% 5.5% 0.7% 6 second advance: 7.0% behind, 11.6% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 2.8% 6.2% 10% 12% 17% 12% 19% 9.0% 9.0% 3.4% 17 second advance: 8.1% behind, 10.7% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0.7% 2.8% 10% 8.3% 14% 17% 14% 14% 6.9% 8.3% 2.8% 30 second advance: 8.9% behind, 9.9% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 7.6% 9.0% 11% 14% 14% 18% 10% 8.3% 5.5% 2.1% 47 second advance: 10.2% behind, 10.5% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0.7% 10% 8.3% 9.7% 14% 17% 9.7% 15% 5.5% 6.9% 3.4% 60 second advance: 8.3% behind, 11.3% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 6.2% 12% 13% 11% 11% 16% 16% 8.3% 4.1% 1.4% 65 second advance: 8.6% behind, 10.7% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 4.8% 5.5% 4.8% 11% 16% 19% 13% 5.5% 12% 4.1% 2.8% 120 second advance: 6.3% behind, 11.1% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 8.3% 0% 22% 0% 35% 0% 20% 0% 14% 0% 290 second advance: 9.1% behind, 13.8% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 6.2% 9.0% 11% 10% 14% 11% 9.7% 9.0% 3.4% 2.8% 0.7% ======= Loaded suite RobertConn\_1 Started 2 second advance: 0.0% behind, 49.7% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0.7% 0% 0% 0% 0% 0% 0% 0% 99% 6 second advance: 0.0% behind, 48.9% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0% 0% 0.7% 0% 0% 0% 0% 99% 17 second advance: 0.0% behind, 46.9% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0% 0% 0.7% 0% 0% 0.7% 9.0% 90% 30 second advance: 0.0% behind, 45.0% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0.7% 0% 0% 0% 1.4% 5.5% 18% 74% 47 second advance: 0.0% behind, 42.2% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0% 0.7% 2.1% 2.1% 2.8% 10% 23% 59% 60 second advance: 0.1% behind, 42.3% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0% 0.7% 1.4% 0.7% 6.9% 12% 22% 57% 65 second advance: 0.1% behind, 41.1% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0% 0.7% 2.7% 2.7% 8.9% 13% 20% 51% 120 second advance: 3.6% behind, 27.9% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 2.1% 0% 9.0% 0% 7.6% 0% 21% 0% 59% 0% 290 second advance: 10.4% behind, 29.5% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 2.3% 5.5% 3.1% 4.7% 3.1% 5.5% 12% 16% 13% 14% 9.4% ======= Loaded suite ThomasMueller\_1 Started 2 second advance: 0.0% behind, 43.1% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0% 0% 0% 0% 0% 1.4% 21% 77% 6 second advance: 0.0% behind, 38.7% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0.7% 0% 0% 0% 0.7% 8.3% 46% 44% 17 second advance: 0.1% behind, 28.2% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0% 0% 0.7% 4.1% 21% 37% 23% 13% 30 second advance: 0.4% behind, 25.1% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 1.4% 0% 1.4% 3.4% 10% 24% 30% 19% 10% 47 second advance: 0.8% behind, 21.9% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0.7% 0.7% 5.5% 9.0% 19% 19% 20% 16% 9.7% 60 second advance: 1.8% behind, 17.2% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0.7% 1.4% 4.1% 9.7% 15% 19% 17% 23% 9.0% 1.4% 65 second advance: 1.9% behind, 21.4% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0.7% 4.9% 6.9% 12% 17% 15% 20% 18% 5.6% 120 second advance: 1.7% behind, 19.3% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0.7% 0% 8.9% 0% 29% 0% 33% 0% 21% 0% 6.2% 290 second advance: 10.4% behind, 12.4% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 11% 14% 12% 9.3% 11% 9.3% 7.9% 5.7% 5.7% 2.9% 0.7% ======= Loaded suite TomPollard\_1 Started 2 second advance: 0.0% behind, 46.5% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0% 0.7% 0% 0% 0% 0% 5.5% 94% 6 second advance: 0.0% behind, 42.7% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0% 0% 0.7% 0% 0% 2.7% 35% 61% 17 second advance: 0.0% behind, 35.5% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0% 0% 0.7% 3.5% 6.3% 19% 38% 33% 30 second advance: 0.1% behind, 29.6% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0.7% 0.7% 4.8% 6.2% 22% 21% 25% 19% 47 second advance: 0.4% behind, 24.5% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 1.4% 3.4% 6.8% 16% 20% 18% 25% 7.5% 60 second advance: 1.5% behind, 23.5% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 2.1% 0% 2.1% 4.8% 14% 12% 14% 20% 21% 9.7% 65 second advance: 1.1% behind, 22.0% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0.7% 0% 0.7% 0.7% 6.9% 14% 16% 21% 19% 14% 7.6% 120 second advance: 5.0% behind, 13.1% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 6.2% 0% 17% 0% 34% 0% 25% 0% 18% 0% 290 second advance: 7.4% behind, 16.4% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 8.0% 12% 11% 11% 12% 10% 10% 7.2% 5.8% 3.6% 0.7% ======= Loaded suite TomPollard\_2 Started 2 second advance: 0.0% behind, 49.6% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0% 0% 0% 0% 0.7% 0% 0% 99% 6 second advance: 0.0% behind, 48.8% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0.7% 0% 0% 0% 0% 0% 0% 0.7% 99% 17 second advance: 0.0% behind, 46.9% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0% 0.7% 0% 0% 0% 2.1% 15% 82% 30 second advance: 0.0% behind, 40.9% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 0% 0% 0% 0.7% 0.7% 3.4% 3.4% 14% 24% 53% 47 second advance: 5.0% behind, 22.2% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 2.8% 4.1% 4.1% 6.9% 8.3% 9.0% 9.7% 10% 12% 16% 16% 60 second advance: 7.7% behind, 19.6% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 8.3% 3.5% 6.9% 5.6% 7.6% 12% 9.7% 13% 8.3% 8.3% 17% 65 second advance: 15.3% behind, 11.3% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 12% 9.7% 15% 12% 14% 6.2% 8.3% 6.9% 4.8% 4.1% 4.8% 120 second advance: 7.6% behind, 16.9% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 0% 12% 0% 11% 0% 18% 0% 33% 0% 22% 0% 290 second advance: 15.1% behind, 16.4% ahead -5 -4 -3 -2 -1 0 +1 +2 +3 +4 +5 12% 12% 9.7% 7.6% 2.8% 5.5% 6.9% 7.6% 4.1% 5.5% 2.8% # ======= The test script follows. Each file was run using: ruby -rtest\_fuzzy.rb require ‘test/unit’ $DEBUG = false class Time def to\_fuzzy s = strftime("%H:%M") s[4] = “~” s end def short strftime("%H:%M") end def round\_to( seconds ) seconds = seconds.round Time.at( self.to\_i / seconds \* seconds ) end end RUNS\_PER\_SET = 1 class FuzzyTimeTester \< Test::Unit::TestCase def test\_running [2, 6, 17, 30, 47, 60, 65, 120, 290].each{ |advance\_seconds| runs, num\_ahead, num\_behind = 0, 0, 0 offsets = Hash.new(0) ``` RUNS_PER_SET.times{ t = Time.at( Time.new + rand( 3600 * 300 ) ) end_time = t + 60 * 60 * 24 # Run for 24 hours ft = FuzzyTime.new( t ) last_value = nil while( t < end_time ) assert_equal t, ft.actual t0 = Time.at( t - 60 * 5 ) t2 = Time.at( t + 60 * 5 ) legal_values = [t0, t, t2].map{ |x| x.to_fuzzy }.uniq fuzzy_fuzz = ft.to_s if last_value y,mon,day = t.year, t.mon, t.day h,m = last_value.scan(/\d+/).map{ |s| s.to_i } m *= 10 if (m -= 10) < 0 m %= 60 if (h -= 1) < 0 h %= 24 end end illegal_old_value = Time.local( y,mon,day,h,m ).to_fuzzy legal_values -= [illegal_old_value] if $DEBUG puts "Now: %s=>%s; legal: %s (was %s, can't be %s)" % [ t.short, fuzzy_fuzz, legal_values.inspect, last_value, illegal_old_value ] end end assert_block( ( "It is %s, the clock displayed %s,\n" + "but it should only display one of %s.\n" + "(Last time I asked, it said it was %s.)" ) % [ t.short, fuzzy_fuzz.inspect, legal_values.inspect, last_value ] ){ legal_values.include?( fuzzy_fuzz ) } actual_fuzz = t.to_fuzzy ahour, amin = actual_fuzz.scan( /\d+/ ).map{ |x| x.to_i } fhour, fmin = fuzzy_fuzz.scan( /\d+/ ).map{ |x| x.to_i } if fuzzy_fuzz != actual_fuzz if fmin>amin || fhour>ahour || ( fhour==0 && ahour==23 ) num_ahead += 1 else num_behind +=1 end end if fuzzy_fuzz != last_value ahour2, amin2 = t.short.scan( /\d+/ ).map{ |x| x.to_i } if fmin>amin || fhour>ahour || ( fhour==0 && ahour==23 ) offset = ( fmin*10 - amin2 ) % 60 else offset = ( fmin*10 - amin2 ) end offsets[offset] += 1 if $DEBUG puts ( "It is %s, I just switched from %s to %s, " + "and I think that's an offset of %+d" ) % [ t.short, last_value, fuzzy_fuzz, offset ] end end runs += 1 last_value = fuzzy_fuzz ft.advance( advance_seconds ) t += advance_seconds end } puts "%d second advance: %.1f%% behind, %.1f%% ahead" % [ advance_seconds, 100.0 * num_behind / runs, 100.0 * num_ahead / runs ] total_offsets = offsets.inject(0){ |sum,kv| sum+kv[1] } -5.upto(5){ |o| print "#{o>0?'+':''}#{o}".center( 5 ) }; print "\n" -5.upto(5){ |o| pct = 100.0 * offsets[o] / total_offsets print( ( "%.#{(pct<10&&pct>0)?1:0}f%" % pct ).center( 5 ) ) }; puts "\n " } ``` end end ---
**Author:** ![phrogz](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/p/2acd7d/32.png) [@phrogz](https://www.ruby-forum.com/u/phrogz)\ **Post date:** [November 7, 2006, 10:56am UTC](https://www.ruby-forum.com/t/fuzzy-time-99-results/74760/2 "2006-11-07T10:56:06Z")
On 02/11/06, Gavin K. [removed\_email\_address@domain.invalid](mailto:removed_email_address@domain.invalid) wrote: > The second line is the result of recording, each time the fuzzy time > changed, how many minutes ahead or behind the actual time the change > occurred. Ideally, you should see the same percentages spread along the > whole range. I see now why the quiz mentioned that we might need to assume a regular observation period of e.g. 7 seconds - to allow us to even out the distribution of times. However, to do this would also require that we know what the total duration of the observation was. Otherwise surely the only solution to ensure roughly average counts of -5 to +5 would be to start by wandering slowly from -5 mins to +5 mins then back (a bit more quickly) to -5 mins again… and repeat? Then after doing that a few times you might think you can become a bit more random and wiggle the wandering a bit… but who’s to say that the observer isn’t going to start the statistics from this point on? Then you’re going to look a bit silly with all that extra wiggling and not averaging out the times. So better stick to just wandering back and forth, back and forth like clockwork… is this random? 🙂 When I tried increasing the RUNS\_PER\_SET value in Gavin’s FuzzyTimeTester from 1 to about 15, I noticed some results take on a more gaussian distribution with a slight weighting to the right because of the “can’t go back in time” condition. I’m starting to think that this may be the only truely random result given some of the conditions of the quiz… but I hope I can be proved wrong! Now looking forward to the conclusion and letting my brain relax at last 🙂