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Should IBOutlets be strong or weak under ARC?
...t practice from Apple is for IBOutlets to be strong unless weak is specifically needed to avoid a retain cycle. As Johannes mentioned above, this was commented on in the "Implementing UI Designs in Interface Builder" session from WWDC 2015 where an Apple Engineer said:
And the last option I want...
Why do people say there is modulo bias when using a random number generator?
...AND_MAX is 10 and I decide to generate a random number between 0 and 2 by calling rand()%3. However, rand()%3 does not produce the numbers between 0 and 2 with equal probability!
When rand() returns 0, 3, 6, or 9, rand()%3 == 0. Therefore, P(0) = 4/11
When rand() returns 1, 4, 7, or 10, rand()%3 ...
Java String split removed empty values
...[] split = data.split("\\|", -1);
Little more details:
split(regex) internally returns result of split(regex, 0) and in documentation of this method you can find (emphasis mine)
The limit parameter controls the number of times the pattern is applied and therefore affects the length of the resultin...
How can I search for a commit message on GitHub?
Not in a Git repository , but rather in GitHub specifically - how do I search just the commit messages of a specific repository/branch?
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Intercept page exit event
...ser might decide to navigate to another website and in doing so could lose all the edits they have not saved.
4 Answers
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How can I define colors as variables in CSS?
...les, so that I can just change a variable to have the new color applied to all elements that use it?
19 Answers
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Most efficient way to prepend a value to an array
...g-O performance if you are ok with modifying the array in-place. If you really can't mutate the original array then you would do something like the below snippet, which doesn't seem to be appreciably faster than your solution:
a.slice().unshift(0); // Use "slice" to avoid mutating "a".
[Edit 2]
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socket.shutdown vs socket.close
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Here's one explanation:
Once a socket is no longer required,
the calling program can discard the
socket by applying a close subroutine
to the socket descriptor. If a
reliable delivery socket has data
associated with it when a close takes
place, the system continues to attempt
da...
How to enable Bootstrap tooltip on disabled button?
... Just a side note, this only works for IE in 11 or higher. Pretty much all other modern browsers have supported it for a while. See: caniuse.com/#feat=pointer-events
– Neil Monroe
Aug 14 '14 at 22:26
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Regular expression matching a multiline block of text
...)((?:(?:\n|\r\n?).+)+)", re.MULTILINE)
BTW, you don't want to use the DOTALL modifier here; you're relying on the fact that the dot matches everything except newlines.
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