今天在寫apollo的ad 部份
有一個部份是在實做百面骰的部份
用百面骰的概念來實做百分比的呈現
例如我有5個值
a 的 比例是20,
b 的 比例是30,
c 的 比例是50,
d 的 比例是80,
f 的 比例是160
然後依比例來讓他們呈現應有的次數
最直接想的是
直接塞個20+30+50+80+160 的array
不過覺得這樣做實在是挺白痴的
覺得應該有更好的方法
經過”貓哥”的小小提示”區間”
我想到的是
$rand = rand(1,$ad_total);
用for 來做
if (0 <= $rand<= a){
return a;
} elseif ( a < $rand <=b ){
return b;
}
一直下去。
不過貓哥寫的是這樣
$rand = rand(1,$ad_total);
for ($i=0; $i
if ($rand < 0) {
break;
}
}
一看就覺得我自已像笨蛋一樣…………………..
有很深的体會,程式寫的好的和不好的差別,真的是一眼就看出來了。 ::S:
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