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Cluster analysis in R: determine the optimal number of clusters
...subset of below data, how many clusters will be appropriate? How can I perform cluster dendro analysis?
7 Answers
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PostgreSQL error: Fatal: role “username” does not exist
...greSQL: can't createdb , can't createuser ; all operations return the error message
15 Answers
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“used as value” in function call
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You've forgotten to declare a return value. It should be:
func sumThis(a, b int) int {
// ...
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What do the &,
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The & marks an alias for the node (in your example &default aliases the development node as "default") and the * references the aliased node with the name "default". The <<: inserts the content of that node.
Allow me to quote the YAML s...
Getting attributes of a class
...spect module. getmembers and the various tests should be helpful.
EDIT:
For example,
class MyClass(object):
a = '12'
b = '34'
def myfunc(self):
return self.a
>>> import inspect
>>> inspect.getmembers(MyClass, lambda a:not(inspect.isroutine(a)))
[('__class__'...
Check if a number has a decimal place/is a whole number
I am looking for an easy way in JavaScript to check if a number has a decimal place in it (in order to determine if it is an integer). For instance,
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Assertion failure in dequeueReusableCellWithIdentifier:forIndexPath:
So I was making an rss reader for my school and finished the code. I ran the test and it gave me that error. Here is the code it's referring to:
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Mechanisms for tracking DB schema changes [closed]
What are the best methods for tracking and/or automating DB schema changes? Our team uses Subversion for version control and we've been able to automate some of our tasks this way (pushing builds up to a staging server, deploying tested code to a production server) but we're still doing database up...
Difference between Visibility.Collapsed and Visibility.Hidden
...MSDN:
Collapsed: Do not display the element, and do not reserve space for it in layout.
Hidden: Do not display the element, but reserve space for the element in layout.
Visible: Display the element.
See: http://msdn.microsoft.com/en-us/library/system.windows.visibility.aspx
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Do event handlers stop garbage collection from occurring?
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For the specific question "Will pClass be garbage collected": the event subscription has no effect on the collection of pClass (as the publisher).
For GC in general (in particular, the target): it depends whether MyFunction i...