From d2bb6cce85df230446ff7bc6c27a13a0be00c7f6 Mon Sep 17 00:00:00 2001 From: BreadFish64 Date: Sun, 18 Mar 2018 21:26:16 -0500 Subject: [PATCH] fix #78 (#79) --- scripts/games/app.js | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/scripts/games/app.js b/scripts/games/app.js index 1d1d721..889c727 100644 --- a/scripts/games/app.js +++ b/scripts/games/app.js @@ -179,15 +179,15 @@ function processGame(game) { model.testcase_date = "2000-01-01"; } else { let recent = model.testcases[0]; - // The displayed compatibility rating is an weighted arithmetic mean of the submitted ratings. + // The displayed compatibility rating is a weighted arithmetic mean of the submitted ratings. let numerator = 0; let denominator = 0; model.testcases.forEach(testcase => { // Build date is a better metric but testcases from the TOML files only have a submission date. let weigh_date = new Date(testcase.buildDate == undefined ? testcase.date : testcase.buildDate); // The test case is weighted on an exponential decay curve such that a test case is half as relevant as each month (30 days) passes. - // The exponent is obtained by dividing the time in millisecond between the current date and date of testing by the number of milliseconds in 30 days (but negative because it's a decay). - let weight = Math.pow(.5, (currentDate - weigh_date) / -(30 * 1000 * 3600 * 24)); + // The exponent is obtained by dividing the time in millisecond between the current date and date of testing by the number of milliseconds in 30 days. + let weight = Math.pow(.5, (currentDate - weigh_date) / (30 * 1000 * 3600 * 24)); numerator += testcase.compatibility * weight; denominator += weight; });