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What is (functional) reactive programming?
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If you want to get a feel for FRP, you could start with the old Fran tutorial from 1998, which has animated illustrations. For papers, start with Functional Reactive Animation and then follow up on links on the publications link on my home page and the FRP link on the ...
Django DB Settings 'Improperly Configured' Error
...s, i.e. those that manage.py shell runs initially. One can add them to the start of the testing script or just run the tests using manage.py test.
Versions:
Python 3.5 (in virtualenv)
PyCharm 2016.3.2 Professional
Django 1.10
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Multi-gradient shapes
...dd stops for the colors that you need. Basically, in my example, you would start with a light green, fade to white slightly before the center (to give a fade, rather than a harsh transition), fade from white to mid green between 45% and 55%, then fade from mid green to dark green from 55% to the end...
Time complexity of Sieve of Eratosthenes algorithm
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Keep in mind that when you find a prime number P while sieving, you don't start crossing off numbers at your current position + P; you actually start crossing off numbers at P^2. All multiples of P less than P^2 will have been crossed off by previous prime numbers.
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What are the GCC default include directories?
...r output, which allows to automatically cut the include pathes from lines, starting with a single space:
$ echo | gcc -Wp,-v -x c++ - -fsyntax-only
ignoring nonexistent directory "/usr/lib/gcc/x86_64-redhat-linux/4.8.2/include-fixed"
ignoring nonexistent directory "/usr/lib/gcc/x86_64-redhat-linux/...
How to use a servlet filter in Java to change an incoming servlet request url?
...ased in the steps of BalusC's answer. The filter forwards all the requests starting with the /ui path (supposing you've got all your xhtml files stored there) to the same path, but adding the xhtml suffix.
public class UrlPrettyfierFilter implements Filter {
private static final String JSF_VIE...
How can I list the contents of a directory in Python?
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os.walk can be used if you need recursion:
import os
start_path = '.' # current directory
for path,dirs,files in os.walk(start_path):
for filename in files:
print os.path.join(path,filename)
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Could not launch process launch failed: timed out waiting for app to launch
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Just updated to Xcode 6.1 and started getting this... Neither this solution, along with the two hints above won't solve this. Tried one iPhone 5 with latest iOS 7, and one iPad with iOS 8.1. Any clues?
– helmesjo
O...
How to show the loading indicator in the top status bar
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It's in UIApplication:
For Objective C:
Start:
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
End:
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
For swift :
Start
UIApplication.shared.isNetworkActivityIndi...
How to reset a single table in rails?
I want the primary key values to start from 1 again.
8 Answers
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