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asynchronous vs non-blocking
...ure out.
To make a good choice, you must analyze your need and test the performance of different architectures. There is no such an architecture that is suitable for various of needs.
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What's the difference between SoftReference and WeakReference in Java?
...rather than expand the heap, whereas the -server JRE tries to keep your performance high by preferring to expand the heap (if possible) rather than clear SoftReferences. One size does not fit all.
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Is Fortran easier to optimize than C for heavy calculations?
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The languages have similar feature-sets. The performance difference comes from the fact that Fortran says aliasing is not allowed, unless an EQUIVALENCE statement is used. Any code that has aliasing is not valid Fortran, but it is up to the programmer and not the compiler ...
Version vs build in Xcode
...ting with Xcode 4. In the target summary I have the iOS application target form with fields: identifier, version, build, devices, and deployment target. The version field is blank and the build field is 3.4.0 (which matches the version of the app from when I was still editing with Xcode 3).
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Angular directives - when and how to use compile, controller, pre-link and post-link [closed]
...t-link
If one is to use all four function, the directive will follow this form:
myApp.directive( 'myDirective', function () {
return {
restrict: 'EA',
controller: function( $scope, $element, $attrs, $transclude ) {
// Controller code goes here.
},
co...
Does Parallel.ForEach limit the number of active threads?
... when it really needs to.
Have a look at the PFX Team Blog for loads of information about how it allocates work and all kinds of other topics.
Note that in some cases you can specify the degree of parallelism you want, too.
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Why can't decimal numbers be represented exactly in binary?
... see that any rational with a terminating 10-representation will be of the form p/q exactly when q has only 2s and 5s in its prime factorisation; and that same number will have a terminating 2-representatiion exactly when q has only 2s in its prime factorisation.
But one of these cases is a subset ...
What algorithm can be used for packing rectangles of different sizes into the smallest rectangle pos
...ing half of the strip until the next item is too wide.
A new baseline is formed and Step (4) is repeated on the lower baseline until all items are packed.
Time complexity: O(n ·log n).
The approximation ratio of Sleator's algorithm is 2.5 which is tight.
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Rails update_attributes without save?
...s true (the default), then sensitive attributes can be protected from this form of mass-assignment by using the attr_protected macro. Or you can alternatively specify which attributes can be accessed with the attr_accessible macro. Then all the attributes not included in that won’t be allowed to b...
How do I use $scope.$watch and $scope.$apply in AngularJS?
... digest loop would take ages to evaluate and you would quickly run into performance issues. That is why the AngularJS team gave us two ways of declaring some $scope variable as being watched (read below).
$watch helps to listen for $scope changes
There are two ways of declaring a $scope variable a...