1.关键字:如果你的数据库的表的设计包含了Access包含的关键字,则在插入的时候会出现“Insert Into 语法错误” 例如: string sqlText = String.Format("Insert into TestTable(Id,Order) values ({0},{1})",123,0); 这行上面这条语句是失败的,原因是TestTable表中有一个关键字"Order",解决办法: (1).将语句中的关键字用[order]处理就可以了.如: s
Given an array of integers, find out whether there are two distinct indices i and j in the array such that the difference between nums[i] and nums[j] is at most t and the difference between i and j is at most k. 这道题跟之前两道Contains Duplicate 包含重复值和Conta
Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct. 这道题不算难题,就是使用一个哈希表,遍历整个数组,如果哈希表里存在,返回fal
判断数组中是否包含某个值这里有四种方法.用的测试数据: let arr=["a","b","c"]; let arr2={"a":"aaa","b":"bbb","c":"ccc"}; in判断是否在数组的key里in操作符针对的是key,而非value.而对于普通的一维数组来说,key是隐藏的.所以,对于判断某个数组中是否含有