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C++ unordered_map using a custom class type as the key
...rrides operator(), or as a specialization of std::equal, or – easiest of all – by overloading operator==() for your key type (as you did already).
The difficulty with the hash function is that if your key type consists of several members, you will usually have the hash function calculate hash ...
Keyboard shortcut to change font size in Eclipse?
...d Fonts preference page, the commands persistently change the font size in all editors of the same type. If the editor type's font is configured to use a default font, then that default font will be zoomed.
So, the font size change is not limited to the current file and the new value of the font s...
How to avoid reinstalling packages when building Docker image for Python projects?
...ase
WORKDIR /srv
ADD ./requirements.txt /srv/requirements.txt
RUN pip install -r requirements.txt
ADD . /srv
RUN python setup.py install
ENTRYPOINT ["run_server"]
Docker will use cache during pip install as long as you do not make any changes to the requirements.txt, irrespective of the fact whet...
How do HashTables deal with collisions?
...lookups in hash tables very slow.
Option 2: If the hash table entries are all full then the hash table can increase the number of buckets that it has and then redistribute all the elements in the table. The hash function returns an integer and the hash table has to take the result of the hash funct...
Detecting when user has dismissed the soft keyboard
... Wait wait wait, I just looked at this a third time - shouldn't the super call be to onKeyPreIme? Or is there a particular reason for it not to be so?
– Erhannis
Jul 3 '14 at 0:55
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How to get std::vector pointer to the raw data?
...he iterator returned by begin() (as the compiler warns, this is not technically allowed because something.begin() is an rvalue expression, so its address cannot be taken).
Assuming the container has at least one element in it, you need to get the address of the initial element of the container, whi...
How to convert JSON to a Ruby hash
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Assuming you have a JSON hash hanging around somewhere, to automatically convert it into something like WarHog's version, wrap your JSON hash contents in %q{hsh} tags.
This seems to automatically add all the necessary escaped text like in WarHog's answer.
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What does cherry-picking a commit with Git mean?
....
This is in contrast with other ways such as merge and rebase which normally apply many commits onto another branch.
Make sure you are on the branch you want to apply the commit to.
git checkout master
Execute the following:
git cherry-pick <commit-hash>
N.B.:
If you cherry-pick f...
Using NSPredicate to filter an NSArray based on NSDictionary keys
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It should work - as long as the data variable is actually an array containing a dictionary with the key SPORT
NSArray *data = [NSArray arrayWithObject:[NSMutableDictionary dictionaryWithObject:@"foo" forKey:@"BAR"]];
NSArray *filtered = [data filteredArrayUsingPredicate:[N...
How to select only the records with the highest date in LINQ
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@JasonL, no. The First() call should apply to the g.Order... expression (subquery).
– Mehrdad Afshari
Aug 29 '13 at 8:04
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