大约有 45,000 项符合查询结果（耗时：0.0417秒） [XML]
Validate uniqueness of multiple columns
...or, but in general I recommend using a database constraint.
More reading: https://robots.thoughtbot.com/validation-database-constraint-or-both
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File path to resource in our war/WEB-INF folder?
... resource = getServletContext().getResourceAsStream("/WEB-INF/my.json");
https://docs.oracle.com/javaee/7/api/javax/servlet/GenericServlet.html#getServletContext--
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HTML/Javascript change div content
...s and firefox (3x faster than chrome!)
You can test it in your machine: https://jsperf.com/js-jquery-html-content-change
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How to get ERD diagram for an existing database?
...do this. It allows you to export the ER diagram as png/svg etc.
DBeaver - https://dbeaver.io/
Double click on a schema (eg, Schemas->public->Tables) and open the "ER Diagram" tab (next to "Properties" tab)
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How would you make two s overlap?
...25px "padding") right of logo */
}
<div id="logo">
<img src="https://via.placeholder.com/200x100" />
</div>
<div id="content">
<div id="links">dssdfsdfsdfsdf</div>
</div>
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how can I see what ports mongo is listening on from mongo shell?
...of other arguments that can alter ports without being explicit, see here:
https://docs.mongodb.org/manual/reference/configuration-options/#sharding.clusterRole
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std::back_inserter for a std::set?
...n 2016 there was a proposal to have a "single argument inserter iterator".
https://isocpp.org/files/papers/p0471r0.html . I couldn't find if it the proposal advanced. I think it makes sense.
For now you can have this behavior defining the maker function:
template<class Container>
auto sinser...
How to use WPF Background Worker
... in .net 4.5 use Task for threading. Here is some documentation about Task
https://docs.microsoft.com/en-us/dotnet/api/system.threading.tasks.task
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Ternary Operator Similar To ?:
...urn a value, you can use this
val a = if (1 < 0) 1 else 2
More info: https://alvinalexander.com/scala/scala-if-then-ternary-operator-cookbook-examples
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Is it possible to group projects in Eclipse?
...xplorer view. In the view menu, click "Projects Layout > Hierarchical". https://www.eclipse.org/mars/noteworthy/#_nested_hierarchical_view_of_projects
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