Problem DescriptionI used to think I could be anything, but now I know that I couldn't do anything. So I started traveling.The nation looks like a con...
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其他好文 时间:
2015-09-11 14:10:07
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180
Given a non-negative integernum, repeatedly add all its digits until the result has only one digit.For example:Givennum = 38, the process is like:3 + ...
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其他好文 时间:
2015-09-11 12:10:30
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111
一般要么是服务器扛不住,或者是mysql设置的最大连接数太小了查看mysql最大连接数show variables like 'max_connections'; Variable_name | Value |+-----------------+-------+| max_connections ...
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数据库 时间:
2015-09-11 10:37:15
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190
like 搜索like 搜索create table name_db (name varchar(20));insert into name_db values('abc'),('bac'),('bca');select * from name_db where name like 'a%'; --...
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其他好文 时间:
2015-09-11 08:04:18
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172
Given a non-negative integernum, repeatedly add all its digits until the result has only one digit.For example:Givennum = 38, the process is like:3 + ...
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其他好文 时间:
2015-09-11 08:00:46
阅读次数:
125
mysql根据配置文件会限制server接受的数据包大小。有时候大的插入和更新会受max_allowed_packet 参数限制,导致写入或者更新失败。查看目前配置show VARIABLES like '%max_allowed_packet%';显示的结果为:+-----------------...
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数据库 时间:
2015-09-10 19:23:55
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188
Mojo-database是我个人比较喜欢多开源项目,下文是该项目打介绍和地址:mojo-database简介:MojoDatabase is an ActiveRecord-like ORM for SQLite written in Objective-C for use in iOS appl...
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数据库 时间:
2015-09-10 19:19:58
阅读次数:
200
4.2 Context-Free Grammars Grammars were introduced in Section 2.2 to systematically describe the syntax of programming language constructs like expres...
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其他好文 时间:
2015-09-10 17:20:35
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206
show?variables?like?‘%character%‘;
?
?+--------------------------+----------------------------+
|?Variable_name????????????|?Value??????????????????????|...
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数据库 时间:
2015-09-10 16:15:55
阅读次数:
187
Given a digit string, return all possible letter combinations that the number could represent.A mapping of digit to letters (just like on the telephon...
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其他好文 时间:
2015-09-10 16:05:38
阅读次数:
211