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Why cast unused return values to void?
Is there any reason for casting an unused return value to void, or am I right in thinking it's a complete waste of time?
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Drop unused factor levels in a subsetted data frame
I have a data frame containing a factor . When I create a subset of this dataframe using subset or another indexing function, a new data frame is created. However, the factor variable retains all of its original levels, even when/if they do not exist in the new dataframe.
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How to set timeout on python's socket recv method?
I need to set timeout on python's socket recv method. How to do it?
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What is the purpose of “&&” in a shell command?
As far as I know, using & after the command is for running it in the background.
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Xcode Command /usr/bin/codesign failed with exit code 1 : errSecInternalComponent
I am trying to add new provisioning profile to my Xcode, to test an app on the device. Here are the steps I followed:
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CentOS+Nginx+PHP+MySQL详细配置(图解) - 更多技术 - 清泛网 - 专注C/C++及内核技术
CentOS+Nginx+PHP+MySQL详细配置(图解)一、安装MySQL 目前web服务器已经很少有跑静态页面的，如果要跑动态网站那当然就离不开数据库，虽然在以前文章中有写MySQL是怎么安装的...一、安装MySQL
目前web服务器已经很少有跑静态页...
Rename column SQL Server 2008
I am using SQL Server 2008 and Navicat. I need to rename a column in a table using SQL.
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Is it more efficient to copy a vector by reserving and copying, or by creating and swapping? [duplic
I am trying to efficiently make a copy of a vector. I see two possible approaches:
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Unicode Processing in C++
What is the best practice of Unicode processing in C++?
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Passing functions with arguments to another function in Python?
Is it possible to pass functions with arguments to another function in Python?
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