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Is file append atomic in UNIX?
In general, what can we take for granted when we append to a file in UNIX from multiple processes? Is it possible to lose data (one process overwriting the other's changes)? Is it possible for data to get mangled? (For example, each process is appending one line per append to a log file, is it po...
Joins are for lazy people?
...0 rows in B, B has only 100 rows, and we want to fetch the first 1000 rows from A with associated rows from B. Joining in the database will result in 20 * 1000 tuples sent across the network. If the join is done in the app server (first fetching the entire B table into memory), a mere 100 + 1000 row...
You asked me to pull without telling me which branch you want to merge with
...h.bucket-4.merge or branch.bucket-4.remote in your git config. The output from git remote show origin is just showing you where the branch would be pushed by default.
Is there some configuration I can add in order to make all local branches track their remotes properly in the future?
I don't ...
Declaration/definition of variables locations in ObjectiveC?
...u were able to access these variables only in your implementation, but not from other classes. To do that, you had to declare accessor methods, that look something like this:
// MyClass.h
@interface MyClass : NSObject {
int myVar;
}
- (int)myVar;
- (void)setMyVar:(int)newVar;
@end
// MyClas...
How to implement onBackPressed() in Fragments?
... If you're using the support v7 library and your Activity extends from FragmentActivity (or a subclass, such as AppCompatActivity) this will happen by default. See FragmentActivity#onBackPressed
– Xiao
Sep 24 '15 at 1:00
...
Set type for function parameters?
...
apart from bashing someone who calls no feature allowing type hinting a blessing I might want to point out typescript: typescriptlang.org basically EM6 + type hinting
– Toskan
Mar 29 '16 at 20...
Passing arguments to angularjs filters
... which has your parameter in its scope as well as the original item coming from the filter.
It took me 2 days to realise you can do this, haven't seen this solution anywhere yet.
Checkout Reverse polarity of an angular.js filter to see how you can use this for other useful operations with filter.
...
Pythonic way to combine FOR loop and IF statement
...
Sounds like from the comments below, I should be studying up on generators. I've never used them. Thanks. Is a generator faster than the equivalent combination of FOR and IF statements? I've also used sets, but sometimes redundant elemen...
What does the Visual Studio “Any CPU” target mean?
... environment, but choose x86 if you have 32-bit dependencies. This article from Microsoft explains this a bit:
/CLRIMAGETYPE (Specify Type of CLR Image)
Incidentally, this other Microsoft documentation agrees that x86 is usually a more portable choice:
Choosing x86 is generally the safest conf...
How to search through all Git and Mercurial commits in the repository for a certain string?
...reflogs
Instead of walking the commit ancestry chain, walk reflog entries from
the most recent one to older ones.
So you could do this to find a particular string in a commit message that is dangling:
git log -g --grep=search_for_this
Alternatively, if you want to search the changes for a pa...