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C++ equivalent of java's instanceof
What is the preferred method to achieve the C++ equivalent of java's instanceof ?
6 Answers
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How to show git log history for a sub directory of a git repo?
Lets say that I have a git repo that looks like this.
6 Answers
6
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How can I create a “Please Wait, Loading…” animation using jQuery?
I would like to place a "please wait, loading" spinning circle animation on my site. How should I accomplish this using jQuery?
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分布式系统的事务处理 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...（一般工业界认为比较安全的备份数应该是3份，如：Hadoop和Dynamo）。 但是，加入更多的机器，会让我们的数据服务变得很复杂，尤其是跨服务器的事务处理，也就是跨服务器的数据一致性。这个是一个很难的问题。 让我们用最...
Can you provide some examples of why it is hard to parse XML and HTML with a regex? [closed]
One mistake I see people making over and over again is trying to parse XML or HTML with a regex. Here are a few of the reasons parsing XML and HTML is hard:
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Take the content of a list and append it to another list
... trying to understand if it makes sense to take the content of a list and append it to another list.
7 Answers
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How to know what the 'errno' means?
... get a human-readable string for the error number. This is the same string printed by perror() but it's useful if you're formatting the error message for something other than standard error output.
For example:
#include <errno.h>
#include <string.h>
/* ... */
if(read(fd, buf, 1)==-1)...
Alternate FizzBuzz Questions [closed]
Anybody have any good FizzBuzz type questions that are not the FizzBuzz problem?
14 Answers
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Entity Framework code first unique column
...bute on your model:
[Index(IsUnique=true)]
You can find it in this namespace:
using System.ComponentModel.DataAnnotations.Schema;
If your model field is a string, make sure it is not set to nvarchar(MAX) in SQL Server or you will see this error with Entity Framework Code First:
Column 'x' ...
How to delete from select in MySQL?
...ery within the same query. However, you can either SELECT then DELETE in separate queries, or nest another subquery and alias the inner subquery result (looks rather hacky, though):
DELETE FROM posts WHERE id IN (
SELECT * FROM (
SELECT id FROM posts GROUP BY id HAVING ( COUNT(id) > ...