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What is an unsigned char?
...char)-1;
It also follows that a conversion is not just truncating higher order bits. The fortunate event for two's complement is that it is just a truncation there, but the same isn't necessarily true for other sign representations.
...
Restore a postgres backup file using the command line?
...allow
pg_restore to be selective about what
is restored, or even to reorder the
items prior to being restored. The
archive file formats are designed to
be portable across architectures.
So depends on the way it was dumped out. You can probably figure it out using the excellent file(1...
NSString property: copy or retain?
...u write yourself), it is usually better to retain them rather than copy in order to avoid wasting time and memory.
– Rob Napier
Apr 27 '10 at 0:08
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What is PEP8's E128: continuation line under-indented for visual indent?
...rs(sample_generators['test'])
Which will give the same style-warning. In order to get rid of it I had to rewrite it to:
return \
combine_sample_generators(sample_generators['train']), \
combine_sample_generators(sample_generators['dev']), \
combine_sample_generators(sa...
Split string into an array in Bash
...on it), but it's undesirable to have to mess with global shell settings in order to hack a basic string-to-array parsing operation in local code.
Another issue with this answer is that all empty fields will be lost. This may or may not be a problem, depending on the application.
Note: If you're go...
Returning IEnumerable vs. IQueryable
...
This is very useful information in order to understand the difference, but the top answer is more accurate as the question was "when should one be preferred over the other?", and not "what is the difference?".
– Scopperloit
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Simplest way to wait some asynchronous tasks complete, in Javascript?
... be the recommended way of structuring several async calls in the required order going forward I guess.
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Check if class already assigned before adding
...noting, JQuery does some optimisation in its removeClass implementation in order to avoid a pointless re-rendering. It goes like this
...
// only assign if different to avoid unneeded rendering.
finalValue = value ? jQuery.trim( cur ) : "";
if ( elem.className !== finalValue ) {
elem.className ...
Cosmic Rays: what is the probability they will affect a program?
...rror Rate of 10-12 for their memory modules", "a observed error rate is 4 orders of magnitude lower than expected". For data-intensive tasks (8 GB/s of memory reading) this means that single bit flip may occur every minute (10-12 vendors BER) or once in two days (10-16 BER).
2009 Google's paper "DR...
Should I be concerned about excess, non-running, Docker containers?
...mance or memory/storage penalties these non-running containers incur.
In order to assess how much storage non-running Docker containers are using, you may run:
docker ps --size --filter "status=exited"
--size: display total file sizes (FYI: Explain the SIZE column in "docker ps -s" and what "v...