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Why is it faster to check if dictionary contains the key, rather than catch the exception in case it
...ey is cheap, because it's a fast, O(1) operation.
BTW: The correct way to do this is to use TryGetValue
obj item;
if(!dict.TryGetValue(name, out item))
return null;
return item;
This accesses the dictionary only once instead of twice.
If you really want to just return null if the key doesn't...
How can I discard remote changes and mark a file as “resolved”?
...n the tree. Then you need to mark the conflicts as resolved, which you can do with git add, and commit your work once done:
git checkout --ours . # checkout our local version of all files
git add -u # mark all conflicted files as merged
git commit # commit the merge
Note ...
How to compare two Dates without the time portion?
...ou use DateTimeComparator.getDateOnlyInstance() it's even simpler :)
// TODO: consider extracting the comparator to a field.
return DateTimeComparator.getDateOnlyInstance().compare(first, second);
("Use Joda Time" is the basis of almost all SO questions which ask about java.util.Date or java.util...
Specifying an Index (Non-Unique Key) Using JPA
How do you define a field, eg email as having an index using JPA annotations. We need a non-unique key on email because there are literally millions of queries on this field per day, and its a bit slow without the key.
...
Can we have functions inside functions in C++?
...int i = 0;
// Captures i by reference; increments it by one
auto addOne = [&] () {
i++;
};
while(i < 10) {
addOne(); //Add 1 to i
std::cout << i << "\n";
}
}
C++98 and C++03 - Not directly, but yes with static functions inside local ...
Why extend the Android Application class?
...
How do you do that ?
– serj
Mar 22 '15 at 9:28
9
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Different ways of clearing lists
Is there any reason to do anything more complicated than one of these two lines when you want to clear a list in Python?
8 ...
Detect element content changes with jQuery
...d detects changes on form elements, but is there a way of detecting when a DOM element's content was changed?
15 Answers
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How do you auto format code in Visual Studio?
...
To format a selection: Ctrl+K, Ctrl+F
To format a document: Ctrl+K, Ctrl+D
See the pre-defined keyboard shortcuts. (These two are Edit.FormatSelection and Edit.FormatDocument.)
Note for OS X
On OS X use the CMD ⌘ key, not Ctrl:
To format a selection: CMD ⌘+K, CMD ...
how to solve “ruby installation is missing psych” error?
...g Ubuntu, make sure that libtool is installed prior to the steps above:
sudo apt-get install libtool
For macOS users (with homebrew):
rm -rf /usr/local/lib/ruby/gems/ && brew reinstall ruby
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