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Using Regular Expressions to Extract a Value in Java
...round brackets (Testing)
System.out.println(m.group(2)); // second one (123)
System.out.println(m.group(3)); // third one (Testing)
}
}
Since you're looking for the first number, you can use such regexp:
^\D+(\d+).*
and m.group(1) will return you the first number. Note that ...
How to define custom exception class in Java, the easiest way?
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No, you don't "inherit" non-default constructors, you need to define the one taking a String in your class. Typically you use super(message) in your constructor to invoke your parent constructor. For example, like this:
public class MyException extends Exception {
public MyException(String me...
find -exec a shell function in Linux?
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find . | while read file; do dosomething "$file"; done
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SQL WHERE ID IN (id1, id2, …, idn)
...SQL engine doesn't immediately know that you want to check if the value is one of the values in a fixed list. However, a good SQL engine could optimize it to have equal performance like with IN. There's still the readability issue though...
Option 3 is simply horrible performance-wise. It sends a qu...
C++ map access discards qualifiers (const)
...nction is part of the upcoming standard, but I find no at() in the current one.
– Sebastian Mach
Nov 18 '10 at 15:18
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jQuery autocomplete tagging plug-in like StackOverflow's input tags? [closed]
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Anyone looking for the most up to date version, documentation and more extensive examples of this amazing plugin should go here and fork away: github.com/aehlke/tag-it
– Crisman
Feb 21 '12 ...
Breaking out of nested loops [duplicate]
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Without the comments, this will be hard for anyone coming along later to understand.
– Eric Walker
Aug 28 '15 at 21:54
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php - get numeric index of associative array
... 'blue' => 'nice',
'car' => 'fast',
'number' => 'none'
);
var_dump(array_search('car', array_keys($a)));
var_dump(array_search('blue', array_keys($a)));
var_dump(array_search('number', array_keys($a)));
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Is it Pythonic to use list comprehensions for just side effects?
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It is very anti-Pythonic to do so, and any seasoned Pythonista will give you hell over it. The intermediate list is thrown away after it is created, and it could potentially be very, very large, and therefore expensive to create.
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indexOf method in an object array?
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I think you can solve it in one line using the map function:
pos = myArray.map(function(e) { return e.hello; }).indexOf('stevie');
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