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Counting DISTINCT over multiple columns
... Would you please add an example or code sample to show more about what this means and how to do it?
– jayqui
Feb 20 at 22:31
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How to do scanf for single char in C [duplicate]
...ng it is not worth the pain.
See: Why does everyone say not to use scanf? What should I use instead?
Using a whitespace character in scanf() would ignore any number of whitespace characters left in the input stream, what if you need to read more inputs? Consider:
#include <stdio.h>
int mai...
How do I get a TextBox to only accept numeric input in WPF?
...t);
I use a simple regex in IsTextAllowed method to see if I should allow what they've typed. In my case I only want to allow numbers, dots and dashes.
private static readonly Regex _regex = new Regex("[^0-9.-]+"); //regex that matches disallowed text
private static bool IsTextAllowed(string text)...
How can I use swift in Terminal?
I read What's new in Xcode 6 . The article introduces some new feature about Xcode 6, and it says:
13 Answers
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Python: Bind an Unbound Method?
...I'm not even sure if supplying it does anything, as it makes no difference what type I supply as the second parameter regardless of what the first parameter is an instance of. So bind = lambda instance, func, asname=None: setattr(instance, asname or func.__name__, func.__get__(instance)) should do t...
How to avoid .pyc files?
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From "What’s New in Python 2.6 - Interpreter Changes":
Python can now be prevented from
writing .pyc or .pyo files by
supplying the -B switch to the Python
interpreter, or by setting the
PYTHONDONTWRITEBYTECODE enviro...
Run a task every x-minutes with Windows Task Scheduler [closed]
...at option (5 minutes or 10 minutes) you can highlight the number and write whatever number you want
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Printing without newline (print 'a',) prints a space, how to remove?
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From PEP 3105: print As a Function in the What’s New in Python 2.6 document:
>>> from __future__ import print_function
>>> print('a', end='')
Obviously that only works with python 3.0 or higher (or 2.6+ with a from __future__ import print_funct...
How to test an SQL Update statement before running it?
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@Green: what do you mean with "fail"?
– a_horse_with_no_name
Oct 31 '17 at 12:20
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Value cannot be null. Parameter name: source
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I had this one a while back, and the answer isn't necessarily what you'd expect. This error message often crops up when your connection string is wrong.
At a guess, you'll need something like this:
<connectionStrings>
<add name="hublisherEntities" connectionString="Data S...