替换算法

Question

for(k = i - 1; k >= 0; k--) {
    if(frame[j] == page[k])
        break;
    least = least < k ? least : k;        
} 

我不明白这条线＆＃34; least = least < k ? least : k;＆＃34;

任何人都可以为我解释

Answer 1

相当于

least = Math.min(least, k);

或

if (!(least < k)) {
    least = k
}

另请参阅：the Java documentation on the ternary operator（滚动到“条件运算符”部分）。

Answer 2

least = least < k ? least : k;

相当于，

if(least < k)
    least = least;
else
    least = k;