从PDF转换
转换为PDF
从PDF处理
从CAD转换
转换为CAD
从图片转换
转换为图片
文件压缩
电子书转换
使用技巧
客户端下载
Ask Time:2021-12-07T19:31:33 Author:saluc
in oracle database on linux server;
desc table_x; => getting data select * from table_x; => getting data SELECT table_name from all_tables; => it is not in the list
How can I get this table to appear in the list?
Thanks.
I know a parent process can have multiple children. But can a child have multiple parents? why or why not?
array has 0 objects, so array.count is 0, and then (array.count - 1) is -1, i < -1 is -1, why it can get in this for loop? for (int i=0; i<array.count-1; i++) { NSLog(@"why it can get in...
I read a document said that Hbase is Consistency and Partition in CAP theory. But I can not understand why Hbase is not A? I think Hbase can always keep service available, so why not A? My
Why can we not define a class as protected? I know that we can't, but why? There should be some specific reason.
I have the following code: try { using (var stream = new MemoryStream()) { var ms = stream; if (control is DockLayoutManager) { if (control.Dispatcher == null || co...
Why a link can not contain a link? Why can not use such a structure? What is the rule on the w3c specification? <pre> <a href="xxx"> <a href="yyy"> &a
In Apple API Reference, it says do not subclass AVPlayerViewController as above. I want to know why. I write a demo subclass AVPlayerViewController intentionally, it can play video normally. I can ...
I've used this popular library Hashids. As this poster mentioned,Hashes produced by these algorithms are designed to be 'one-way'. Then, why is it possible for a hash value to be decoded? I've re...
Why in java (I dont know any other programming languages) can an identifier not start with a number and why are the following declarations also not allowed? int :b; int -d; int e#; int .f; int 7g;