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What is a NullPointerException, and how do I fix it?
...e a valid point. It's difficult on the internet to really judge where someone is at, and at what level it's safe to start an explanation. I'll try revising this again.
– Bill the Lizard
Feb 20 '09 at 4:32
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Do sealed classes really offer performance Benefits?
...ze on the algorithmic level before you optimize on the code-level.
Here's one link mentioning this: Rambling on the sealed keyword
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What is a domain specific language? Anybody using it? And in what way?
... features that make it easy to build new DSLs.
Martin Fowler is a big proponent of the idea, as here.
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Replacing a char at a given index in string? [duplicate]
...an using ToCharArray as in Jon's answer, you should run tests to see which one is faster.
– Thomas Levesque
Feb 20 '12 at 20:18
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1052: Column 'id' in field list is ambiguous
...depreciated' since SQL-92 introduced NATURAL JOIN.
– onedaywhen
Jul 2 '18 at 12:53
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How do I ignore files in a directory in Git?
...entical. The only time you need to put a leading slash is when there isn't one in the path already. For example, to ignore foo only at the top level of the repository, use /foo. Simply writing foo would ignore anything called foo anywhere in the repository.
Your wildcards are also redundant. If you...
What are type lambdas in Scala and what are their benefits?
...guments, but to implement Monad, you need to give it a type constructor of one argument. The solution to this is to use a type lambda:
class EitherMonad[A] extends Monad[({type λ[α] = Either[A, α]})#λ] {
def point[B](b: B): Either[A, B]
def bind[B, C](m: Either[A, B])(f: B => Either[A, C...
Replace transparency in PNG images with white background
... Check out my answer below. It was added 2 years after this one.
– Rok Kralj
Apr 3 '13 at 8:34
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How can I reverse a NSArray in Objective-C?
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One of the bad things about Fast Enumeration is that new guys like me don't learn about cool things like reverseObjectEnumerator. Pretty neat way to do it.
– Brent Royal-Gordon
Feb 25 '...
Python: Ignore 'Incorrect padding' error when base64 decoding
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This is good with a one caveat. base64.decodestring is deprecated, use base64.b64_decode
– ariddell
Mar 27 '15 at 10:37
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