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What is the difference between sigaction and signal?
...serious use. Note that the POSIX standard says their behaviour in multi-threaded programs is undefined.
Multi-threaded programs and signals is a whole other complicated story. AFAIK, both signal() and sigaction() are OK in multi-threaded applications.
Cornstalks observes:
The Linux man page for s...
Handling a colon in an element ID in a CSS selector [duplicate]
...arator using the web.xml file as init-param of javax.faces.SEPARATOR_CHAR
Read this:
Is it possible to change the element id separator in JSF?
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What's so bad about in-line CSS?
...ery month, (fairly new to web programming) and this is the first time i've read anything about the css file being cached. That does it for me right there!
– ganders
Jul 25 '14 at 13:11
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The Ruby %r{ } expression
...ote that the %r{}x variant ignores whitespace, making complex regexps more readable. Example from GitHub's Ruby style guide:
regexp = %r{
start # some text
\s # white space char
(group) # first group
(?:alt1|alt2) # some alternation
end
}x
...
Get all non-unique values (i.e.: duplicate/more than one occurrence) in an array
...
This is my answer from the duplicate thread (!):
When writing this entry 2014 - all examples were for-loops or jQuery. Javascript has the perfect tools for this: sort, map and reduce.
Find duplicate items
var names = ['Mike', 'Matt', 'Nancy', 'Adam', 'Jenn...
CSS two divs next to each other
... then it must come first in the HTML source. This breaks the left-to-right read order, which could be confusing if the page is displayed with styles turned off. If that's the case, it might be better to use a wrapper div and absolute positioning:
<div id="wrap" style="position:relative;">
...
Filter by process/PID in Wireshark
...ith main process and you've got a perfect port-to-process mapper. However, reading the bug from question comment, the module isn't as simple to create.
– Vesper
Mar 1 '17 at 6:59
...
Rails create or update magic?
... if it doesn't exist.
def self.find_by_or_create_with(args, attributes) # READ CAREFULLY! args for finding, attributes for creating!
obj = self.find_or_initialize_by(args)
return obj if obj.persisted?
return obj if obj.update_attributes(attributes)
end
...
How can I initialise a static Map?
...gree, this is the nicest way of initializing a constant map. Not only more readable but also since Collections.unmodifiableMap returns a read-only view of the underlying map (that still can be modified).
– crunchdog
May 3 '12 at 7:29
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Regular vs Context Free Grammars
...
Nope, that is short description, please read again and check the image.
– Ahmed Salem
Jan 29 at 6:43
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