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What happens when a duplicate key is put into a HashMap?
...value associated with the given key in the map (conceptually like an array indexing operation for primitive types).
The map simply drops its reference to the value. If nothing else holds a reference to the object, that object becomes eligible for garbage collection. Additionally, Java returns any...
Is it fine to have foreign key as primary key?
...concepts in a database and can easily be mixed just as easily as adding an index (which would be a third separate concept).
– blindguy
Jan 24 at 16:57
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Spring Boot not serving static content
...ll be resolved relative to these locations. Thus src/main/resources/static/index.html will be served when the request URL is /index.html. The class that is responsible for resolving the path, as of Spring 4.1, is org.springframework.web.servlet.resource.PathResourceResolver.
Suffix pattern matching ...
How to convert std::string to LPCWSTR in C++ (Unicode)
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(Found this question browsing randomly; it's been a long time since I did C++.) So the standard library doesn't have std::string -> std::wstring conversion? That seems weird; is there a good reason?
– Domenic
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Is there a short contains function for lists?
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The list method index will return -1 if the item is not present, and will return the index of the item in the list if it is present. Alternatively in an if statement you can do the following:
if myItem in list:
#do things
You can also...
Yii2 data provider default sorting
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This solution works but the search in index doesn't work now.
– Roby Sottini
Nov 16 '17 at 12:14
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How can I stop .gitignore from appearing in the list of untracked files?
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Once a file is tracked, you can use git update-index --assume-unchanged <file> to stop tracking changes without changing your repo. This is very useful on large shared projects where you need to make local changes, but nobody else wants to see your stuff committed ...
Is there a RegExp.escape function in Javascript?
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@Paul: Perl quotemeta (\Q), Python re.escape, PHP preg_quote, Ruby Regexp.quote...
– bobince
Oct 3 '13 at 10:24
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How can I remove duplicate rows?
... SQL Server LEFT JOIN is less efficient than NOT EXISTS sqlinthewild.co.za/index.php/2010/03/23/… The same site also compares NOT IN vs NOT EXISTS. sqlinthewild.co.za/index.php/2010/02/18/not-exists-vs-not-in Out of the 3 I think NOT EXISTS performs best. All three will generate a plan with a self...
Declare a const array
...fields is a good habit to form.
Creates an array-like structure (allowing indexed access) that is truly and robustly read-only (conceptually constant, once created), both with respect to:
preventing modification of the collection as a whole (such as by removing or adding elements, or by assigning...