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What is the difference between square brackets and parentheses in a regex?
... of the use of a character class and a single metacharacter is a bad idea, by the way, since the layer of abstraction can slow down the match, but this is only an implementation detail and only applies to a few of regex implementations. JavaScript is not one, but it does make the subpattern slightly...
Can enums be subclassed to add new elements?
... This approach of deriving an enum from an interface is used by the Java 1.7 API, e.g. java.nio.file.Files.write() takes an array of OpenOption as the last argument. OpenOption is an interface, but when we call this function we usually pass a StandardOpenOption enum constant, which is ...
How can I see the request headers made by curl when sending a request to the server?
I want to see the request headers made by curl when I am sending a request to the server. How can I check that?
14 Answer...
How do I parse an ISO 8601-formatted date?
...t tries to guess the format and makes inevitable assumptions (customizable by hand only) in ambiguous cases. So ONLY use it if you need to parse input of unknown format and are okay to tolerate occasional misreads.
– ivan_pozdeev
Apr 23 '15 at 23:34
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What is the Git equivalent for revision number?
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@Lii: What do you mean by "source commit"? Both the nearest tag (v1.0.4) and the most recent commit id (2414721) are already part of the git describe output.
– Greg Hewgill
Oct 15 '18 at 19:34
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CATALINA_OPTS vs JAVA_OPTS - What is the difference?
...use CATALINA_OPTS. So if you're setting environment variables for use only by Tomcat, you'll be best advised to use CATALINA_OPTS, whereas if you're setting environment variables to be used by other java applications as well, such as by JBoss, you should put your settings in JAVA_OPTS.
Source: CATA...
Find a commit on GitHub given the commit hash
...ile.ext - e.g. github.com/mongodb/mongo/blob/…
– RubyTuesdayDONO
Mar 5 '13 at 16:56
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Choose Git merge strategy for specific files (“ours”, “mine”, “theirs”)
...The index may contain unmerged entries because of a previous failed merge. By default, if you try to check out such an entry from the index, the checkout operation will fail and nothing will be checked out. Using -f will ignore these unmerged entries. The contents from a specific side of the merge c...
How SignalR works internally?
...ame
Long polling
SignalR tries to choose the "best" connection supported by server and client (you can also force it to use a specific transport).
That's the high level. If you want to see how each transport is implemented, you can look at the source code.
There's also client code for each tran...
Using getopts to process long and short command line options
...ions either.
GNU implementation of standalone getopt. GNU getopt(3) (used by the command-line getopt(1) on Linux) supports parsing long options.
Some other answers show a solution for using the bash builtin getopts to mimic long options. That solution actually makes a short option whose chara...