Counting
The Problem
Gustavo knows how to count, but he is now learning how write numbers. As he is a very good student, he already learned 1, 2, 3 and 4. But he didn't realize yet tha...
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其他好文 时间:
2014-07-18 22:04:36
阅读次数:
322
Problem Description
The Czech Technical University is rather old — you already know that it celebrates 300 years of its existence in 2007. Some of the university buildings are old as well. And the ...
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其他好文 时间:
2014-07-18 12:24:56
阅读次数:
217
脑补一下JDBC基础知识,原文链接:http://docs.oracle.com/javase/tutorial/jdbc/basics/gettingstarted.htmlIf you are using Java DB, it already comes with a JDBC driver....
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数据库 时间:
2014-07-18 10:37:40
阅读次数:
248
http://yzxqml.iteye.com/blog/1761540————————————————————————————————————————————————————————————————————————————————Log4j是Apache的一个开放源代码项目,通过使用Log4j,我...
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移动开发 时间:
2014-07-18 09:02:20
阅读次数:
277
错误:
rake aborted!
Gem::LoadError: You have already activated rake 10.3.2, but your Gemfile requires rake 10.1.1. Prepending `bundle exec` to your command may solve this.
解决:
bundle exec rake d...
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其他好文 时间:
2014-07-17 10:31:22
阅读次数:
209
问题:No JVM installation found. Please install a 64-bit JDK. If you already have a JDK installed, define a JAVA_HOME variable in Computer > System Prope...
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移动开发 时间:
2014-07-16 21:39:23
阅读次数:
261
问题:Error: [1146] ORA-01146: cannot start online backup - file 1 is already in backupORA-01110: data file 1: 'C:\ORACLE\ORADATA\ORCL8\SYSTEM01.DBF'以上问题...
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数据库 时间:
2014-07-16 17:37:05
阅读次数:
398
报错的代码是:
The specified child already has a parent. You must call removeView() on the child's parent first
大致是说你的弹出框中的view已经绑定了一个paren,就是你的弹出框。当你再次调用显示的时候,他以为你又要绑定到一个新的窗口上去。解决的方法是每次显示之前都重新填充设置view.如下:...
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其他好文 时间:
2014-07-12 23:50:41
阅读次数:
354
今天在对临时表新增栏位时遇到了错误:ORA-14450 attempt to access a transactional temp table already inuse
下面根据实验模拟了2种临时表使用不当报ORA-1445O的原因:
1、基于事物的临时表
SQL> create
global temporary
tabletemp_tab on
commit delete r...
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数据库 时间:
2014-07-12 23:14:25
阅读次数:
352
ERROR namenode.NameNode: java.io.IOException: Cannot lock storage /tmp/hadoop-root/dfs/name. The directory is already locked....
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其他好文 时间:
2014-07-11 00:23:43
阅读次数:
362