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What is the difference between an int and a long in C++?
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It is implementation dependent.
For example, under Windows they are the same, but for example on Alpha systems a long was 64 bits whereas an int was 32 bits. This article covers the rules for the Intel C++ compiler on variable platforms. To summarize:
OS arch ...
How to convert SQL Query result to PANDAS Data Structure?
Any help on this problem will be greatly appreciated.
17 Answers
17
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How do I draw a shadow under a UIView?
I'm trying to draw a shadow under the bottom edge of a UIView in Cocoa Touch. I understand that I should use CGContextSetShadow() to draw the shadow, but the Quartz 2D programming guide is a little vague:
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Paste in insert mode?
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While in insert mode hit CTRL-R {register}
Examples:
CTRL-R * will insert in the contents of the clipboard
CTRL-R " (the unnamed register) inserts the last delete or yank.
To find this in vim's help type :h i_c...
How do I use .toLocaleTimeString() without displaying seconds?
I'm currently attempting to display the user's time without displaying the seconds. Is there a way I can do this using Javascript's .toLocaleTimeString()?
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What are the dangers when creating a thread with a stack size of 50x the default?
I'm currently working on a very performance critical program and one path I decided to explore that may help reduce resource consumption was increasing my worker threads' stack size so I can move most of the data ( float[] s) that I'll be accesing onto the stack (using stackalloc ).
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return statement vs exit() in main()
Should I use exit() or just return statements in main() ? Personally I favor the return statements because I feel it's like reading any other function and the flow control when I'm reading the code is smooth (in my opinion). And even if I want to refactor the main() function, having return...
CentOS+Nginx+PHP+MySQL详细配置(图解) - PHP - 清泛IT论坛，有思想、有深度
...=mysql //初始化MySQL数据库
#chown -R mysql /usr/local/mysql/var
#/usr/local/mysql/bin/mysqld_safe & //启动MySQL
#/usr/local/mysql/bin/mysqladmin -u root password 123456 //设置MySQL密码
#cp ...
“Auto Layout still required after executing -layoutSubviews” with UITableViewCell subclass
Using XCode 4.5 and iOS 6, I'm developing an app with a simple table view with custom cells. I've done this a hundred times in iOS 5 and below, but for some reason the new autoLayout system is giving me a lot of trouble.
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Is #pragma once a safe include guard?
I've read that there is some compiler optimization when using #pragma once which can result in faster compilation. I recognize that is non-standard, and thus could pose a cross-platform compatibility issue.
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