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std::string to float or double
...to convert a string to a double.
You can do it with the stringstream or boost::lexical_cast but those come with a performance penalty.
Ahaha you have a Qt project ...
QString winOpacity("0.6");
double temp = winOpacity.toDouble();
Extra note:
If the input data is a const char*, QByteArray::to...
Programmatically generate video or animated GIF in Python?
...ng x = [a, b, c] to *x which can be thought of as a, b, c (without the enclosing brackets). In function calls these are synonymous: f(*x) == f(a, b, c). In tuple unpacking it's particularly useful in cases where you want to split an iterable into a head (first element) and a tail (the rest), which i...
How do I create a nice-looking DMG for Mac OS X using command-line tools?
...You may have to reboot after this change (it doesn't work otherwise on Mac OS X Server 10.4).
Create a R/W DMG. It must be larger than the result will be. In this example, the bash variable "size" contains the size in Kb and the contents of the folder in the "source" bash variable will be copied int...
VS2005混合编译ARM汇编代码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...S2005混合编译ARM汇编代码公司HW team有人希望可以给他们写一个在WinCE上，单独读写DDR的工具，以方便他们量测Memory读写时的硬件信号。在开发过程中，发现简单的在...公司HW team有人希望可以给他们写一个在WinCE上，单独读写DDR的...
Is MonoTouch now banned on the iPhone? [closed]
A recent post by John Gruber notes that the following legalese:
18 Answers
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How to change SmartGit's licensing option after 30 days of commercial use on ubuntu?
...able to use SG anymore without paying (I'm not using it for commercial purposes). Do you know how to fix it?
15 Answers
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How do I completely uninstall Node.js, and reinstall from beginning (Mac OS X)
...rences fixed the phantom v0.6.1-pre. If anyone has an explanation, I'll choose that as the correct answer.
EDIT:
You may need to do the additional instructions as well:
sudo rm -rf /usr/local/{lib/node{,/.npm,_modules},bin,share/man}/{npm*,node*,man1/node*}
which is the equivalent of (same as a...
How do I get the path of the Python script I am running in? [duplicate]
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os.path.realpath(__file__) will give you the path of the current file, resolving any symlinks in the path. This works fine on my mac.
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Wi-Fi 是什么的缩写 - 程序人生、谈天论地 - 清泛IT论坛，有思想、有深度
... 802.11 标准的无线网络技术作为己任，因此他们认为需要一个朗朗上口的名字来代替拗口的专业术语（呃…什么？802.11b 直接序列扩频？那是什么东西…），以便这个概念能更好地在民间扩散。这时候，上图中出镜的联盟创始人...
Reading a file line by line in Go
... From the docs: "ReadLine is a low-level line-reading primitive. Most callers should use ReadBytes('\n') or ReadString('\n') instead or use a Scanner."
– mdwhatcott
Mar 18 '14 at 23:20
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