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How to skip over an element in .map()?
... With all these negative, "empty"-style values (null, undefined, NaN etc) it would be good if we could utilise one inside a map() as an indicator that this object maps to nothing and should be skipped. I often come across arrays I want to map 98% of (eg: String.split() leaving a single, empty...
Why are empty strings returned in split() results?
...ned records (such as csv file lines [[net of quoting issues]], lines from /etc/group in Unix, and so on), it allows (as @Roman's answer mentioned) easy checks for (e.g.) absolute vs relative paths (in file paths and URLs), and so forth.
Another way to look at it is that you shouldn't wantonly toss ...
How to place two divs next to each other?
...ng issue: since divs are made inline you have to keep no spaces, new lines etc between them in your HTML. Otherwise, browsers will render a space between them. See this Fiddle: you can't manage to keep both divs on the same line unless you put theirs tags without anything in between.
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Why are regular expressions so controversial? [closed]
...ions. And not just slow, but the performance of the regex engine can be totally unpredictable when faced with arbitrary (user-supplied) inputs.
– Pacerier
Dec 1 '15 at 21:53
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Is optimisation level -O3 dangerous in g++?
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In the early days of gcc (2.8 etc.) and in the times of egcs, and redhat 2.96 -O3 was quite buggy sometimes. But this is over a decade ago, and -O3 is not much different than other levels of optimizations (in buggyness).
It does however tend to reveal ca...
Check if a subview is in a view
...s only checks if it is a child view, not a grandchild or great grandchild, etc.
– Sami Samhuri
Jul 30 '14 at 1:41
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How to theme the ENTIRE Xcode IDE to light-on-dark?
... have to fix up the other dark-themed apps I already use (Terminal, xterm, etc), and I don't have a solution for things like web browser content. So unless the reverse-video can be made app-specific, the solution is likely not going to be feasible.
– pokkimon
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Why is there huge performance hit in 2048x2048 versus 2047x2047 array multiplication?
...in L2 (i.e when you access matice2[0, 0], matice2[1, 0], matice2[2, 0] ... etc, nothing gets evicted) than there is no problem with cache misses with matice2 either.
Now to go deeper in how caches works, if byte address of your variable is X, than the cache line for it would be (X >> 6) &...
C# nullable string error
...> and the ? suffix are for value types such as Int32, Double, DateTime, etc.
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Why is a boolean 1 byte and not 1 bit of size?
...bably) exist computers which support 4-bit byte, you don't have 4-bit bool etc.
However, if you can design such an architecture which can address 4-bit as basic addressable unit, then you will have bool of size 4-bit then, on that computer only!
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