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How to get duplicate items from a list using LINQ? [duplicate]
... .ToList();
The GroupBy groups the elements that are the same together, and the Where filters out those that only appear once, leaving you with only the duplicates.
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What's the point of 'const' in the Haskell Prelude?
...mewhat neater than using a lambda
x >> y = x >>= \_ -> y
and you can even use it point-free
(>>) = (. const) . (>>=)
although I don't particularly recommend that in this case.
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Define global variable in a JavaScript function
...object. (In the latest specification, ECMAScript 2015, the new let, const, and class statements at global scope create globals that aren't properties of the global object; a new concept in ES2015.)
(There's also the horror of implicit globals, but don't do it on purpose and do your best to avoid do...
Finding the source code for built-in Python functions?
...rieving Source Code in the documentation of inspect.
For built-in classes and methods this is not so straightforward since inspect.getfile and inspect.getsource will return a type error stating that the object is built-in. However, many of the built-in types can be found in the Objects sub-director...
How can I get clickable hyperlinks in AlertDialog from a string resource?
...n AlertDialog . While the AlertDialog implementation happily underlines and colors any hyperlinks (defined using <a href="..."> in the string resource passed to Builder.setMessage ) supplied the links do not become clickable.
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Constructor in an Interface?
...which implement the message interface, I can only define the
send method and not the constructor"
...these requirements are exactly what abstract classes are for.
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Is there a combination of “LIKE” and “IN” in SQL?
...ecause Full Text Search (FTS) is the recommended alternative.
Both Oracle and SQL Server FTS implementations support the CONTAINS keyword, but the syntax is still slightly different:
Oracle:
WHERE CONTAINS(t.something, 'bla OR foo OR batz', 1) > 0
SQL Server:
WHERE CONTAINS(t.something, '"b...
How to open the default webbrowser using java
...one point me in the right direction on how to open the default web browser and set the page to "www.example.com" thanks
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Java 8 Lambda function that throws exception?
I know how to create a reference to a method that has a String parameter and returns an int , it's:
25 Answers
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Distributed sequence number generation?
...m first seeing now.
You'll need to differentiate between sequence numbers and unique IDs that are (optionally) loosely sortable by a specific criteria (typically generation time). True sequence numbers imply knowledge of what all other workers have done, and as such require shared state. There is n...