这是黑客新闻排名算法,我认为这是一种简单的排名方式,特别是如果用户对项目进行投票,但我真的不明白这一点,这可以转换为PHP,所以我可以完全理解它?黑客新闻算法在PHP?
; Votes divided by the age in hours to the gravityth power.
; Would be interesting to scale gravity in a slider.
(= gravity* 1.8 timebase* 120 front-threshold* 1
nourl-factor* .4 lightweight-factor* .17 gag-factor* .1)
(def frontpage-rank (s (o scorefn realscore) (o gravity gravity*))
(* (/ (let base (- (scorefn s) 1)
(if (> base 0) (expt base .8) base))
(expt (/ (+ (item-age s) timebase*) 60) gravity))
(if (no (in s!type 'story 'poll)) .8
(blank s!url) nourl-factor*
(mem 'bury s!keys) .001
(* (contro-factor s)
(if (mem 'gag s!keys)
gag-factor*
(lightweight s)
lightweight-factor*
1)))))
感谢你为这个伟大的答案,可以您只需为我解释$ item_hour_age,谢谢,btw +1 upvote form :) :) – getaway 2010-10-20 19:24:58
@getaway - '$ item_hour_age'是您排名以小时计的东西的年龄(自创建以来的时间量) (从0开始) – 2010-10-20 19:26:19
干杯! :))标记你的惊人 – getaway 2010-10-20 19:27:12