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Simple Pivot Table to Count Unique Values
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108
Insert a 3rd column and in Cell C2 paste this formula
=IF(SUMPRODUCT(($A$2:$A2=A2)*($B$2:$B2=B...
Selecting an element in iFrame jQuery
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answered Jun 11 '11 at 16:07
Darin DimitrovDarin Dimitrov
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What are the Web.Debug.config and Web.Release.Config files for?
I just upgraded to Visual Studio 2010 and MVC 2.0 and I noticed the Web.config has two additional files attached to it? Are these files used to specify debug and release specific settings, so you don't clutter up the main Web.config?
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Should the hash code of null always be zero, in .NET
... what the hash code of null should be. It looks like the framework uses 0 :
9 Answers
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What is the difference between LL and LR parsing?
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490
At a high level, the difference between LL parsing and LR parsing is that LL parsers begin at th...
How do I view an older version of an SVN file?
...n SVN file which is now missing some logic and so I need to go back about 40 revisions to the time when it had the logic I need. Other than trying to view a diff of the file in the command line ( very hard to read ), is there any way I could get a copy of that file to review so I can study it to rec...
Why is Maven downloading the maven-metadata.xml every time?
...y or always?
– Leon
Nov 22 '17 at 9:07
@Leon During mid-development cycle your project might have '-SNAPSHOT' dependen...
How do I get the last character of a string?
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public static void main(String args[]) {
String string = args[0];
System.out.println("last character: " +
string.substring(string.length() - 1));
}
}
The output of java Test abcdef:
last character: f
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Best way of invoking getter by reflection
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edited Feb 13 '15 at 20:39
Johnny Bones
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answ...
9个常用iptables配置实例 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...p发来的包丢弃：
BLOCK_THIS_IP="x.x.x.x"
iptables -A INPUT -i eth0 -p tcp -s "$BLOCK_THIS_IP" -j DROP
以上命令设置将由x.x.x.x ip发往eth0网口的tcp包丢弃。
4.配置服务项
利用iptables，我们可以对日常用到的服务项进行安全管理，比如设定只能...