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Reading a binary file with python
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How can I use grep to find a word inside a folder?
...r (rather than the standard newline) and the applies grep -li word to each set of files. On the grep, -l means "list the files that match" and -i means "case insensitive"; you can usually combine single character options so you'll see -li more often than -l -i.
If you don't use -print0 and -0 then ...
libcurl的使用总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
..._easy_init()函数得到 easy interface型指针
3. 调用curl_easy_setopt设置传输选项
4. 根据curl_easy_setopt设置的传输选项，实现回调函数以完成用户特定任务
5. 调用curl_easy_perform（）函数完成传输任务
6. 调用curl_easy_cleanup...
How do you debug a regex? [closed]
Regular expressions can become quite complex. The lack of white space makes them difficult to read. I can't step though a regular expression with a debugger. So how do experts debug complex regular expressions?
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Check if a class has a member function of a given signature
...rameter fails for first overload of check and it's discarded from overload set. It falls back to the second one that returns false_type. This is not a compiler error because SFINAE principle.
– jrok
Feb 20 '14 at 7:57
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Can a C++ enum class have methods?
...Flag2 = 0x02 , // Bit #1
Flag3 = 0x04 , // Bit #3
// aso ...
}
// Sets both lower bits
unsigned char flags = (unsigned char)(Flags::Flag1 | Flags::Flag2);
// Set Flag3
flags |= Flags::Flag3;
// Reset Flag2
flags &= ~Flags::Flag2;
Obviously one thinks of encapsulating the necessary o...
How do I list one filename per output line in Linux?
...angle non-ASCII and control characters in file names, these cases are a subset of those that do not require obtaining a file name from ls.
In python, there is absolutely no reason to invoke ls. Python has all of ls's functionality built-in. Use os.listdir to list the contents of a directory and os....
What does %~dp0 mean, and how does it work?
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The variable %0 in a batch script is set to the name of the executing batch file.
The ~dp special syntax between the % and the 0 basically says to expand the variable %0 to show the drive letter and path, which gives you the current directory containing the bat...
Detect if a NumPy array contains at least one non-numeric value?
...ent is NAN, does this solution involve iterating over the full array? If I set the first element to NAN, this still takes about 5microseconds, which seems quite slow for what can be done with an array lookup and a test -- should be nanoseconds, no?
– user48956
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Code Golf: Lasers
...ts of %t for a character that matches > ^ < or v, and simultaneously sets $d to a value between 0 and 3 that indicates the initial direction of the laser beam.
At the beginning of each iteration in the main loop, we update $d if the beam is currently on a mirror. XOR'ing by 3 gives the correc...