大约有 30,000 项符合查询结果（耗时：0.0215秒） [XML]
Regex: match everything but specific pattern
...ttern (e.g. any - empty, too - string not starting with foo):
Lookahead-based solution for NFAs:
^(?!foo).*$
^(?!foo)
Negated character class based solution for regex engines not supporting lookarounds:
^(([^f].{2}|.[^o].|.{2}[^o]).*|.{0,2})$
^([^f].{2}|.[^o].|.{2}[^o])|^.{0,2}$
a string ...
How can I change Mac OS's default Java VM returned from /usr/libexec/java_home
...t it's unlikely to be universally-applicable. I have a bunch of other Java-based software tat I run as well like Eclipse, JasperReports iReport, etc. that are all likely to be affected by this. I think I'd rather just move the JDK1.8 directory somewhere else and use that explicitly with JAVA_HOME fo...
What does “The APR based Apache Tomcat Native library was not found” mean?
...
It means exactly what it says: "The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path"
The library referred to is bundled into an OS specific dll (tcnative-1.dll) loaded via JN...
How to find the type of an object in Go?
...
Based on a barebones benchmark, the reflect approach is surprisingly more efficient gist.github.com/mrap/7f08c9549289b6aea2923c27888e7e3e
– Mike Rapadas
Apr 6 '17 at 20:53
...
What are the mechanics of short string optimization in libc++?
...ng
Note: __compressed_pair is essentially a pair optimized for the Empty Base Optimization, aka template <T1, T2> struct __compressed_pair: T1, T2 {};; for all intents and purposes you can consider it a regular pair. Its importance just comes up because std::allocator is stateless and thus e...
How to have Android Service communicate with Activity
... I have a Service that will run in the background and do some gps and time based logging. I will have an Activity that will be used to start and stop the Service.
...
How do I convert between big-endian and little-endian values in C++?
...32 bit numbers:
unsigned long _byteswap_ulong(unsigned long value);
For 64 bit numbers:
unsigned __int64 _byteswap_uint64(unsigned __int64 value);
8 bit numbers (chars) don't need to be converted.
Also these are only defined for unsigned values they work for signed integers as well.
For floa...
What does the brk() system call do?
...
If you want to do fancy memory allocation, either base it oon top of malloc, or on top of mmap. Don't touch brk and sbrk, they are relics from the past that do more harm than good (even the manpages tell you to stay clear of them!)
– Eloff
...
Google Authenticator implementation in Python
...ected with incorrect value of secret key (it must be correct parameter for base64.b32decode() function).
Below I post full working solution with explanation on how to use it.
Code
The following code is enough. I have also uploaded it to GitHub as separate module called onetimepass (available here...
How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
...ady be fetched and in cache, the branch target maybe or maybe not. With a 64 bit CPU you grab at least 64 bits at a time. Depending on DRAM interleave, it may be 2x 3x or more bits that get grabbed.
– Bryce
Feb 15 '17 at 19:39
...