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Difference between Activity Context and Application Context
...ose calls. If you show the exact error message, might be able to point to what exactly it needs.
But in general, use the activity context unless you have a good reason not to.
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What does f+++++++++ mean in rsync logs?
...ng. During the process of writing that script I googled around and came to what @mit had written above. I used that information, as well as documentation from other sources, to create my own primer on the bit flags and how to get rsync to output bit flags for all actions (it does not do this by defa...
Linux how to copy but not overwrite? [closed]
...
cp -n
Is what you want. See the man page.
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What are the mechanics of short string optimization in libc++?
...y dissected the long/short flag, and the size field in the short form.
what value would __min_cap, the capacity of short strings, take for different architectures?
In the short form, there are 3 words to work with:
1 bit goes to the long/short flag.
7 bits goes to the size.
Assuming char, 1 ...
What does (x ^ 0x1) != 0 mean?
... illustrate the 0 == ( x ^ 0x1 ) expression on binary level:
what? xxxxxxxx (8 bits)
xor 00000001 (hex 0x1 or 0x01, decimal 1)
gives 00000000
---------------------------
the only answer is 00000001
so:
0 == ( x ^ 0x1 ) => x == 1
0 != ( ...
`testl` eax against eax?
...ade an edit to turn this popular answer into a better canonical answer to "what's this TEST thing all about, and how is it different from CMP", which is sort of implied. See my own answer further down for comments about the semantic meaning of the synonymous JE and JZ. Please review my edit since ...
What does it mean to start a PHP function with an ampersand?
... @WildlyInaccurate: Assigning objects by reference by default, which is what happens in .NET and in Java (I think), is highly unintuitive. In most other languages, assignment is done by copy, whether you have an "object" or a primitive or whatever, and since this has been the case since the dawn ...
When to encode space to plus (+) or %20?
...mes the spaces get URL encoded to the + sign, some other times to %20 . What is the difference and why should this happen?
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Is key-value observation (KVO) available in Swift?
...nfo): consider whether using the Combine framework can help you accomplish what you wanted, rather than using KVO
Yes and no. KVO works on NSObject subclasses much as it always has. It does not work for classes that don't subclass NSObject. Swift does not (currently at least) have its own native ob...
What does 'synchronized' mean?
...d 2 made to foo, or worse, it may only be half changed. This would not be what you logically expect.
Again, this is a non-trivial topic in Java. To learn more, explore topics here on SO and the Interwebs about:
Concurrency
Java Memory Model
Keep exploring these topics until the name "Brian G...