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Can you grab or delete between parentheses in vi/vim?
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Nearly. Testing this, it looks like the cursor needs to be on the first parenthesis, not between, and 'c' is the change command. With the cursor on the opening parenthesis, 'di(' deletes to the matching closing parenthesis, and 'yi(...
Optional Parameters with C++ Macros
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With greatest respect to Derek Ledbetter, David Sorkovsky, Syphorlate for their answers, together with the ingenious method to detect empty macro arguments by Jens Gustedt at
https://gustedt.wordpress.com/2010/06/08/detect-empty-macr...
Delete files older than 15 days using PowerShell
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Thanks for this, esp including the 'WhatIf' switch for testing.
– JoelAZ
Jul 30 at 18:33
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Is there a performance difference between a for loop and a for-each loop?
... using strings.get(i) */ }
Now the actual two cents: At least when I was testing these, the third one was the fastest when counting milliseconds on how long it took for each type of loop with a simple operation in it repeated a few million times - this was using Java 5 with jre1.6u10 on Windows in...
How can I clone an SQL Server database on the same server in SQL Server 2008 Express?
...stem which contains a database that I would like to 'copy and rename' (for testing purposes) but I am unaware of a simple way to achieve this.
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OpenSSH升级后不能登录的问题 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...级过程很顺利
具体情况这里http://pkgs.org/centos-6/ghettoforge-testing-x86_64/openssh-6.6.1p1-4.gf.el6.x86_64.rpm.html
备份原有源
cd /etc/yum.repos.d/
mv rhel-source.repo rhel-source.repo.bak
mv packagekit-media.repo packagekit-media.repo.bak
配置源
vi CentOS-Base.repo
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Extracting bits with a single multiplication
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Great. One more subtle problem: the m-1/n-m test fails some of the time due to carry-bits. Try a...b..c...d -- you wind up with b+c in the fifth bit which if they're both 1 makes a carry bit that clobbers d(!)
– Ternary
Jan 28 '1...
How to select rows from a DataFrame based on column values?
...pd.Series
mask = df['A'].values == 'foo'
I'll show more complete time tests at the end, but just take a look at the performance gains we get using the sample data frame. First, we look at the difference in creating the mask
%timeit mask = df['A'].values == 'foo'
%timeit mask = df['A'] == 'foo...
How to mock ConfigurationManager.AppSettings with moq
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From above it's just using Moq as "normal". Untested, but something like: var configurationMock = new Mock<IConfiguration>(); and for the setup: configurationMock.SetupGet(s => s.User).Returns("This is what the user property returns!");
– J...
Convert a list of data frames into one data frame
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My guess is that using do.call("rbind", ...) is going to be the fastest approach that you will find unless you can do something like (a) use a matrices instead of a data.frames and (b) preallocate the final matrix and assign to it rather than growing it.
Edit 1:
Based on Hadley's comment, ...