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schema builder laravel migrations unique on two columns
...lso somehow missed the fact the second param is to manually name the index and I had an automatically generated index name which was too long. Thank you, man! +1
– Ciprian Mocanu
Feb 2 '16 at 9:04
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PyPy — How can it possibly beat CPython?
...nted in RPython which is a statically typed subset of Python (the language and not the CPython interpreter). - Refer https://pypy.readthedocs.org/en/latest/architecture.html for details.
Q3. And what are the chances of a PyPyPy or PyPyPyPy beating their score?
That would depend on the implementati...
Express res.sendfile throwing forbidden error
...then call res.sendfile. You can resolve the path with path.resolve beforehand.
var path = require('path');
res.sendFile(path.resolve('temp/index.html'));
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If string is empty then return some default value
Often I need to check if some value is blank and write that "No data present" like that:
6 Answers
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How to pass a function as a parameter in Java? [duplicate]
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Java 8 and above
Using Java 8+ lambda expressions, if you have a class or interface with only a single abstract method (sometimes called a SAM type), for example:
public interface MyInterface {
String doSomething(int param1, S...
Eclipse, regular expression search and replace
... as part of the replace string when performing a regular expression search and replace?
5 Answers
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Why should I declare a virtual destructor for an abstract class in C++?
... abstract classes that function as interfaces? Please provide some reasons and examples why.
7 Answers
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sqlalchemy IS NOT NULL select
...s is a better solution because NULL is not a valid as the RHS of != in SQL and using isnot better conveys your intentions for what you want the generated statement to look like.
– Josh
Sep 2 '16 at 16:04
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How do I cast a variable in Scala?
...rred technique is to use pattern matching. This allows you to gracefully handle the case that the value in question is not of the given type:
g match {
case g2: Graphics2D => g2
case _ => throw new ClassCastException
}
This block replicates the semantics of the asInstanceOf[Graphics2D]...
How is pattern matching in Scala implemented at the bytecode level?
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case Sum(l,r) // instance of check followed by fetching the two arguments and assigning to two variables l and r but see below about custom extractors
case "hello" // equality check
case _ : Foo // instance of check
case x => // assignment to a fresh variable
case _ => // do nothing, this is...