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Meaning of tilde in Linux bash (not home directory)
... retrieved real-time using getpwent(). This function is usually controlled by NSS; so by default values are pulled out of /etc/passwd, though it can be configured to retrieve the information using any source desired, such as NIS, LDAP or an SQL database.
Tilde expansion is more than home directory l...
emacs/elisp: What is the hash (pound, number sign, octothorp) symbol used for?
...lds t
The # can be used in front of a lambda expression indicating to the byte-compiler that the following expression can be byte compiled, see the docs for Anonymous Functions. But there's nothing to compile in the case of a symbol.
In general, it is used in the printed representation along with...
How to safely open/close files in python 2.4
...file, call f.close() to close it and free up any system resources taken up by the open file. After calling f.close(), attempts to use the file object will automatically fail.
Hence use close() elegantly with try/finally:
f = open('file.txt', 'r')
try:
# do stuff with f
finally:
f.close()...
Convert JsonNode into POJO
...e ObjectMapper since version 1.7.9, it looks like my answer is out of date by a few versions. Definitely check what version of Jackson you're using.
– Eric Barr
Oct 2 '14 at 17:08
...
intellij - spring is not being recognized (Unmapped Spring configuration)
...you need to do the following:
Go to the project structure dialog (either by clicking the warning or through file=>project structure
select the modules item in the left hand list
go through and right click on the modules with missing files and select Add=>Spring
in the new tab click the + but...
Click through div to underlying elements
...
As noted by @Andy, this breaks scrolling. I opened a separate issue to see if there's a solution to this stackoverflow.com/questions/41592349/…
– Oliver Joseph Ash
Jan 11 '17 at 13:42
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Where do “pure virtual function call” crashes come from?
...sions of MSVC, replace the runtime library's purecall handler. You do this by providing your own function with this signature:
int __cdecl _purecall(void)
and linking it before you link the runtime library. This gives YOU control of what happens when a purecall is detected. Once you have control ...
How to install a specific JDK on Mac OS X?
..., not Sun, for Java on the Mac. As far as I know, Apple JDK 6 is installed by default on Mac OS X 10.6 (Snow Leopard). Maybe you need to install the developer tools from your Mac OS X installation DVD (the dev tools are an optional install from the OS DVD).
See: http://developer.apple.com/java/
NO...
How to check if a line is blank using regex
...check if a given string line is "blank" (i.e. containing only whitespaces) by trim()-ing it, then checking if the resulting string isEmpty().
In Java, this would be something like this:
if (line.trim().isEmpty()) {
// line is "blank"
}
The regex solution can also be simplified without anchor...
Ruby: extend self
In Ruby, I understand the basic idea of extend . However, what's happening in this segment of code? Specifically, what does extend do? Is it just a convenient way of making the instance methods into class methods? Why would you do it this way rather than specifying class methods from the beginnin...