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Why hasn't functional programming taken over yet?
... programming (languages), tried out Haskell as well as written one myself. From what I've seen, functional programming has several advantages over the classical imperative style:
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How do I get around type erasure on Scala? Or, why can't I get the type parameter of my collections?
... list of ints!")
}
You can also do this using ClassTags (which saves you from having to depend on scala-reflect):
import scala.reflect.{ClassTag, classTag}
def matchList2[A : ClassTag](list: List[A]) = list match {
case strlist: List[String @unchecked] if classTag[A] == classTag[String] => p...
Android - implementing startForeground for a service?
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From your main activity, start the service with the following code:
Intent i = new Intent(context, MyService.class);
context.startService(i);
Then in your service for onCreate() you would build your notification and set i...
Restore the state of std::cout after manipulating it
...cal variable and disable them before state.copyfmt, then restore exception from the variable (and do this again after restoring state from oldState which has exceptions disabled). 3) Set rdbuf to std::ios like this: struct : std::streambuf {} sbuf; std::ios oldState(&sbuf);
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Incrementing in C++ - When to use x++ or ++x?
...for me.
For those who don't own the book, here are the pertinent quotes. From page 32:
From your days as a C programmer, you may recall that the prefix form of the increment operator is sometimes called "increment and fetch", while the postfix form is often known as "fetch and increment." The...
How to convert int[] into List in Java?
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There is no shortcut for converting from int[] to List<Integer> as Arrays.asList does not deal with boxing and will just create a List<int[]> which is not what you want. You have to make a utility method.
int[] ints = {1, 2, 3};
List<Integer>...
Read the package name of an Android APK
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Is there a way to call this from within Android code? I want to be able to launch a package of an apk I download through my app.
– Matt Wear
Jun 19 '12 at 15:59
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Get the current git hash in a Python script
...s a good way of creating a human-presentable "version number" of the code. From the examples in the documentation:
With something like git.git current tree, I get:
[torvalds@g5 git]$ git describe parent
v1.0.4-14-g2414721
i.e. the current head of my "parent" branch is based on v1.0.4, but since it...
How to store date/time and timestamps in UTC time zone with JPA and Hibernate
...Statement.setTimestamp both say in their docs that they transform dates to/from the current JVM timezone by default when reading and writing from/to the database.
I came up with a solution to this in Hibernate 3.5 by subclassing org.hibernate.type.TimestampType that forces these JDBC methods to use...
Java8 Lambdas vs Anonymous classes
...xpressions is that AICs introduce a new scope. That is, names are resolved from the AIC's superclasses and interfaces and can shadow names that occur in the lexically enclosing environment. For lambdas, all names are resolved lexically.
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