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C++中判断文件、目录是否存在的几种方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...介绍几种方法。
首先关于判断文件的存在性：
一、ifstream
在C++中，可以利用ifstream文件输入流，当我们直接使用ifstream来创建文件输入流的时候，如果文件不存在则流创建失败。
ifstream fin("hello.txt");
if (!fin)
{
std::cout <...
css3 实现静态图片闪烁效果 - 更多技术 - 清泛网 - 专注C/C++及内核技术
css3 实现静态图片闪烁效果css代码： *图标闪烁动画效果* titleM img { animation: start 1 5s infinite ease-in-out; -moz-animation: start css代码：
/*图标闪烁动画效果*/
.titleM img {
animation: start 1.5s infinite ease-in-out;
-moz-animation: start 1...
Python string class like StringBuilder in C#?
... answered Mar 10 '10 at 5:11
Andrew HareAndrew Hare
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How to form tuple column from two columns in Pandas
I've got a Pandas DataFrame and I want to combine the 'lat' and 'long' columns to form a tuple.
4 Answers
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Titlecasing a string with exceptions
Is there a standard way in Python to titlecase a string (i.e. words start with uppercase characters, all remaining cased characters have lowercase) but leaving articles like and , in , and of lowercased?
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Maven project.build.directory
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project.build.directory
sourceDirectory, scriptSourceDirectory, and testSourceDirectory provide access to the source directories for the project. outputDirectory and testOutputDirectory provide access to the directories where Maven is going to put bytecode or other build output. directory...
Is the size of C “int” 2 bytes or 4 bytes?
... sizeof(int) can be any value from 1. A byte is not required to be 8 bits and some machines don't have a 8 bit addressable unit (which basically is the definition of a byte in the standard). The answer is not correct without further information.
– too honest for this site
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How to check the version before installing a package using apt-get?
...ow the version details.
It also shows which version is currently installed and which versions are available to install.
For example, apt-cache policy hylafax+
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Ruby - elegantly convert variable to an array if not an array already
...ent, or nil, obtain an array - the latter two being a single element array and an empty array respectively.
10 Answers
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From io.Reader to string in Go
...ice is to stick to the official method. Doing a copy is not that expensive and it is not worth the evils of unsafe. If the string is too large to do a copy, you should not be making it into a string.
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