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Short description of the scoping rules?
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Actually, a concise rule for Python Scope resolution, from Learning Python, 3rd. Ed.. (These rules are specific to variable names, not attributes. If you reference it without a period, these rules apply.)
LEGB Rule
Local — Names assigned in any way within a function (def or...
ASP.NET_SessionId + OWIN Cookies do not send to browser
...ome specific state, whole Set-Cookie header is first cleared and recreated from cookies stored in collection.
ASP.NET session implementation uses System.Web.HttpResponse.Cookies property to store it's ASP.NET_SessionId cookie. Also there is some basic optimization in ASP.NET session state module (S...
Fastest way to determine if an integer's square root is an integer
...the classical way.
// The correctness is not trivial as the conversion from long to double is lossy!
final long tst = (long) Math.sqrt(x);
return tst * tst == x;
}
The first test catches most non-squares quickly. It uses a 64-item table packed in a long, so there's no array access cost ...
How to check if an intent can be handled from some activity?
...you tried this intent?
Intent intent = new Intent(Intent.ACTION_VIEW, Uri.fromFile(yourFileHere));
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How to set or change the default Java (JDK) version on OS X?
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This did not work for me. Grab the path from running java_home -V and add this to the export command, like this export JAVA_HOME="/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home"
– oden
Nov 28 '14 at 1:04
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How to get Linux console window width in Python
...ly universal on linux. It opens the 'stty size' command as a file, 'reads' from it, and uses a simple string split to separate the coordinates.
Unlike the os.environ["COLUMNS"] value (which I can't access in spite of using bash as my standard shell) the data will also be up-to-date whereas I believ...
Check if a String contains numbers Java
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To explain: .* means any character from 0 to infinite occurence, than the \\d+ (double backslash I think is just to escape the second backslash) and \d+ means a digit from 1 time to infinite.
– Giudark
Sep 29 '16 at 0:11
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.gitignore all the .DS_Store files in every folder and subfolder
...n't forget the period!
git rm --cached .DS_Store
removes only .DS_Store from the current directory. You can use
find . -name .DS_Store -print0 | xargs -0 git rm --ignore-unmatch
to remove all .DS_Stores from the repository.
Felt tip: Since you probably never want to include .DS_Store files, ...
Python + Django page redirect
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It's simple:
from django.http import HttpResponseRedirect
def myview(request):
...
return HttpResponseRedirect("/path/")
More info in the official Django docs
Update: Django 1.0
There is apparently a better way of doing this ...
Double vs. BigDecimal?
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There are two main differences from double:
Arbitrary precision, similarly to BigInteger they can contain number of arbitrary precision and size
Base 10 instead of Base 2, a BigDecimal is n*10^scale where n is an arbitrary large signed integer and scale ...