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How do I select a random value from an enumeration?
Given an arbitrary enumeration in C#, how do I select a random value?
9 Answers
9
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Iterating over each line of ls -l output
...
Set IFS to newline, like this:
IFS='
'
for x in `ls -l $1`; do echo $x; done
Put a sub-shell around it if you don't want to set IFS permanently:
(IFS='
'
for x in `ls -l $1`; do echo $x; done)
Or use while | read instead:
ls -l $1 | while read x; do echo $x; done
One more opti...
How do I sort a Set to a List in Java?
...List . Is there a method in the java.util.Collections package that will do this for me?
10 Answers
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What is declarative programming? [closed]
... when you write your code in such a way that it describes what you want to do, and not how you want to do it. It is left up to the compiler to figure out the how.
Examples of declarative programming languages are SQL and Prolog.
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Django: multiple models in one template using forms [closed]
...d()
b_valid = formB.is_valid()
c_valid = formC.is_valid()
# we do this since 'and' short circuits and we want to check to whole page for form errors
if a_valid and b_valid and c_valid:
a = formA.save()
b = formB.save(commit=False)
c = formC.save(commit=False)
...
How do I copy items from list to list without foreach?
How do I transfer the items contained in one List to another in C# without using foreach ?
8 Answers
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The model backing the context has changed since the database was created
... IDatabaseInitializer instance."
Here is what is going on and what to do about it:
When a model is first created, we run a DatabaseInitializer to do
things like create the database if it's not there or add seed data.
The default DatabaseInitializer tries to compare the database schema
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Most efficient way to reverse a numpy array
...u re-creating the view more often than you need to? You should be able to do something like this:
arr = np.array(some_sequence)
reversed_arr = arr[::-1]
do_something(arr)
look_at(reversed_arr)
do_something_else(arr)
look_at(reversed_arr)
I'm not a numpy expert, but this seems like it would be t...
Angularjs loading screen on ajax request
...variable to indicate data loading status, it is better to have a directive does everything for you:
angular.module('directive.loading', [])
.directive('loading', ['$http' ,function ($http)
{
return {
restrict: 'A',
link: function (scope, elm, attrs)
...
Why in C++ do we use DWORD rather than unsigned int? [duplicate]
...
DWORD is not a C++ type, it's defined in <windows.h>.
The reason is that DWORD has a specific range and format Windows functions rely on, so if you require that specific range use that type. (Or as they say "When in Rome, do as the Romans do.") For you, that happens...