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Algorithm for creating a school timetable
...e these constraints and goals into MAXSAT. MAXSAT algorithms are generally more reliable than genetic algorithms, but you may have clause explosion due to goals like the math classes should be spread out over the week.
– Jules
May 4 '10 at 1:41
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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?
...st-API, which is deprecated as of Scala 2.10. Please see answers below for more current solutions.
Scala was defined with Type Erasure because the Java Virtual Machine (JVM), unlike Java, did not get generics. This means that, at run time, only the class exists, not its type parameters. In the exam...
How can I change the color of a part of a TextView?
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Spannable is more flexible:
String text2 = text + CepVizyon.getPhoneCode() + "\n\n"
+ getText(R.string.currentversion) + CepVizyon.getLicenseText();
Spannable spannable = new SpannableString(text2);
spannable.setSpan(new Fo...
How to check iOS version?
...version as an indication of device or OS capabilities. There is usually a more reliable method of checking whether a particular feature or class is available.
Checking for the presence of APIs:
For example, you can check if UIPopoverController is available on the current device using NSClassFromS...
How can you do anything useful without mutable state?
...t just setting up all kinds of boundaries to purposefully make programming more difficult. My point of view, you're just experiencing the Blub paradox.
I was skeptical at first, but I jumped on the functional programming train a few years ago and fell in love with it. The trick with functional prog...
How can I get nth element from a list?
...ct not be the proper data structure. For O(1) index-based access there are more efficient alternatives, such as arrays or vectors.
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Rails extending ActiveRecord::Base
...rt::Concern (Preferred)
Read the ActiveSupport::Concern documentation for more details.
Create a file called active_record_extension.rb in the lib directory.
require 'active_support/concern'
module ActiveRecordExtension
extend ActiveSupport::Concern
# add your instance methods here
def f...
C++ code file extension? .cc vs .cpp [closed]
...ugh for a curious and mindful programmer. I'd like the answer on this page more since it has more detailed explanations.
– Novin Shahroudi
Oct 25 '17 at 7:26
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How does StartCoroutine / yield return pattern really work in Unity?
...calculates the next value in the sequence (returning false if there are no more values), and Current retrieves the value it calculated.
Ordinarily, if you wanted to implement an interface, you’d have to write a class, implement the members, and so on. Iterator blocks are a convenient way of i...
Maximum length for MD5 input/output
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