我正在为练习写一个快速排序函数。我已经知道了5行函数的快速排序;但是我想要改进分区,让它扫描一次列表,并返回一对列表,将原来的列表分割成两半。else part (t, pivot, (lesseq, h :: greater)) part (rest, pivot, ([pivot], []))这个分区足够好fun quicksort_2 nil = nillet
val (lesseq, great
目的是连接同一个表,并使用where子句撤回两个不同的列 , count(a.case_id) AS Pending , sum(b.total_errors) AS Errors WHERE a.team_qc1_qa2 = "qa"
and a.q_status in ("Not Started","Under Review","Fol