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namespaces for enum types - best practices
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74
Original C++03 answer:
The benefit from a namespace (over a class) is that you can use using de...
理解Python的 with 语句 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...给变量'sample' 3. 执行代码块，打印变量"sample"的值为 "Foo" 4. __exit__()方法被调用 with真正强大之处是它可以处理异常。可能你已经注意到Sample类的__exit__方法有三个参数- val, type 和 trace。 这些参数在异常处理中相当有用。我们来改...
How do I view 'git diff' output with my preferred diff tool/ viewer?
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VonCVonC
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Speed up the loop operation in R
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438
Biggest problem and root of ineffectiveness is indexing data.frame, I mean all this lines wher...
Assign output of a program to a variable using a MS batch file
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443
One way is:
application arg0 arg1 > temp.txt
set /p VAR=<temp.txt
Another is:
for /f...
What is Bit Masking?
...lying the mask to the value means that we want to clear the first (higher) 4 bits, and keep the last (lower) 4 bits. Thus we have extracted the lower 4 bits. The result is:
Mask: 00001111b
Value: 01010101b
Result: 00000101b
Masking is implemented using AND, so in C we get:
uint8_t stuff(...) ...
Is there a way to specify how many characters of a string to print out using printf()?
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edited Feb 14 '19 at 15:42
answered Feb 10 '10 at 19:08
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How do I properly compare strings in C?
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Jonathan Leffler
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answered Nov 4 '11 at 2:24
MysticialM...
一个自媒体的运营手记：我做公众号已经两年多了 - 资讯 - 清泛网 - 专注C/C...
...行Q群推广的时候，我基本选择在早上上班时候或者下午4点的时候，那个时候一开电脑大家都会到Q群里打声招呼，下午4点的时候工作基本干完了，都会在群里扯淡，这两个时候群的活跃度比较高，这个发一个图片二维码到群里...
Save modifications in place with awk
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In GNU Awk 4.1.0 (released 2013) and later, it has the option of "inplace" file editing:
[...] The "inplace" extension, built using the new facility, can be used to simulate the GNU "sed -i" feature. [...]
Example usage:
$ gawk -i inp...