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fix #78 (#79)

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BreadFish64 2018-03-18 21:26:16 -05:00 committed by Flame Sage
parent 412a77d7c8
commit d2bb6cce85
1 changed files with 3 additions and 3 deletions
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6
scripts/games/app.js
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@ -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;
});