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What are the precise rules for when you can omit parenthesis, dots, braces, = (functions), etc.?
...ef x: Any; def y: Any}
Because the type parameter, T, is inferred as the least common supertype of the two - Any.
Function definitions:
= can be dropped if the function returns Unit (nothing).
{} for the function body can be dropped if the function is a single statement, but only if the state...
Does MSTest have an equivalent to NUnit's TestCase?
...Express' Test Explorer unfortunately doesn't recognize these tests. But at least the "full" VS versions now support that feature!
To use it, just install the NuGet packages MSTest.TestFramework and MSTest.TestAdapter (both pre-release as of now).
Older answer:
If don't have to stick with MSTest a...
How to use OpenSSL to encrypt/decrypt files?
...ginal poster does not specify output format and so I feel that at the very least this should be mentioned. See answer: stackoverflow.com/a/31552829/952234 which also includes a note on why you should use gpg instead of openssl for this task.
– moo
Mar 26 '16 at...
Why does changing 0.1f to 0 slow down performance by 10x?
...three significant digits, then 0.00001 = 1e-5, and 0.00001 + 0.1 = 0.1, at least for this example float format, because it doesn't have room to store the least significant bit in 0.10001.
In short, y[i]=y[i]+0.1f; y[i]=y[i]-0.1f; isn't the no-op you might think it is.
Mystical said this as well: th...
Can PostgreSQL index array columns?
...ex Cond: (foo[1] = 1)
Total runtime: 0.112 ms
(3 rows)
This works on at least Postgres 9.2.1. Note that you need to build a separate index for each array index, in my example I only indexed the first element.
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Greedy vs. Reluctant vs. Possessive Quantifiers
... greedy quantifier tells the engine to start with the entire string (or at least, all of it that hasn't already been matched by previous parts of the regular expression) and check whether it matches the regexp. If so, great; the engine can continue with the rest of the regexp. If not, it tries again...
Using emit vs calling a signal as if it's a regular function in Qt
... having the 'syntactic sugar' in this case just confuses the novice (or at least me when I was a novice Qt user) - it appears that something magical or important is happening with the emit pseudo-keyword, when it does nothing at all - all the magic happens in a regular old function that moc creates ...
How do I associate file types with an iPhone application?
...ddition to Brad's excellent answer, I have found out that (on iOS 4.2.1 at least) when opening custom files from the Mail app, your app is not fired or notified if the attachment has been opened before. The "open with…" popup appears, but just does nothing.
This seems to be fixed by (re)moving th...
FixedThreadPool vs CachedThreadPool: the lesser of two evils
...FixedThreadPool are both backed by the same thread pool implementation (at least in the open JDK) just with different parameters. The differences just being their thread minimum, maximum, thread kill time, and queue type.
public static ExecutorService newFixedThreadPool(int nThreads) {
return...
What does Ruby have that Python doesn't, and vice versa?
...since it's missing some of the useful syntactic sugar. However, there's at least one way to get it in an ad-hoc fashion. See, for example, here.
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