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What are the differences between various threading synchronization options in C#?
...cessary:
You can see an example of how monitors can be implemented here:
http://cvs.savannah.gnu.org/viewvc/dotgnu-pnet/pnet/engine/lib_monitor.c?revision=1.7&view=markup
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How to conditionally push an item in an observable array?
...t id="vid" />
<button onclick="find()">Set by id</button>
http://jsfiddle.net/rathore_gee/Y4wcJ/
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How do I vertically center UITextField Text?
...scenders, descenders etc.
(source: ilovetypography.com)
(Image thanks to http://ilovetypography.com/2009/01/14/inconspicuous-vertical-metrics/ )
When you're dealing with just numbers for example, the standard center alignment won't look quite right. Compare the difference in the two below, which ...
How to clone a case class instance and change just one field in Scala?
...It turns out it is just a few lines of code in the scalaz library:
/** http://stackoverflow.com/a/5597750/329496 */
case class Lens[A, B](get: A => B, set: (A, B) => A) extends ((A) => B) with Immutable {
def apply(whole: A): B = get(whole)
def mod(a: A, f: B => B) = set(a...
Listing all permutations of a string/integer
.....z) -->
a + perm(...), b + perm(....)
....
I found the pseudocode on http://www.programmersheaven.com/mb/Algorithms/369713/369713/permutation-algorithm-help/:
makePermutations(permutation) {
if (length permutation < required length) {
for (i = min digit to max digit) {
if (i not...
Finding the path of the program that will execute from the command line in Windows
...ideas for this script were taken from Raymond Chen's blog:
rem
rem http://blogs.msdn.com/b/oldnewthing/archive/2005/01/20/357225.asp
rem
rem
rem - it'll be nice to at some point extend this so it won't stop on the first match. That'll
rem help diagnose situations with a conflict of some ...
What does “%.*s” mean in printf?
...
See: http://www.cplusplus.com/reference/clibrary/cstdio/printf/
.* The precision is not specified in the format string, but as an additional integer value argument preceding the argument that has to be formatted.
s String of c...
Working with Enums in android
...e of 2014 that advises against the use of enums in an android application. http://developer.android.com/training/articles/memory.html#Overhead
I quote:
Be aware of memory overhead
Be knowledgeable about the cost and overhead of the language and
libraries you are using, and keep this info...
Find running median from a stream of integers
...n optimized generator version with the indexable skiplist code inlined):
http://code.activestate.com/recipes/576930-efficient-running-median-using-an-indexable-skipli/
http://code.activestate.com/recipes/577073 .
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Rails where condition using NOT NIL
...t's easy:
Foo.includes(:bar).where.not(bars: {id: nil})
See also:
http://guides.rubyonrails.org/active_record_querying.html#not-conditions
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