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How do I create a unique constraint that also allows nulls?
... If you are using SQL Server 2008 or later, see the answer below with over 100 upvotes. You can add a WHERE clause to your Unique Constraint.
– Darren Griffith
Feb 8 '13 at 22:01
1...
What kinds of patterns could I enforce on the code to make it easier to translate to another program
... this a much bigger task for real languages than you expect. We have some 100 man-years invested in just DMS, and another 6-12 months in each "reliable" language definition (including the one we painfully built for PHP), much more for nasty languages such as C++. It will be a "hell of a learning e...
What is time_t ultimately a typedef to?
... another subject.
To answer paxdiablo's query, I'd say that it printed "19100" because the program was written this way (and I admit I did this myself in the '80's):
time_t now;
struct tm local_date_time;
now = time(NULL);
// convert, then copy internal object to our object
memcpy (&local_date...
What does the (unary) * operator do in this Ruby code?
...ialized with several arguments creates them as key value pairs:
Hash["a", 100, "b", 200] #=> {"a"=>100, "b"=>200}
So in your example this would lead to the following Hash:
{"first_name"=>"mickey", "last_name"=>"mouse", "county"=>"usa"}
...
Is there a way to define a min and max value for EditText in Android?
...ass
percentage_edit_text.filters = arrayOf(Utilities.InputFilterMinMax(1, 100))
This EditText allows from 1 to 100.
Then use this from your XML
android:inputType="number"
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improve this ...
Label points in geom_point
...,
point.padding = 0.5,
force = 100,
segment.size = 0.2,
segment.color = "grey50",
direction = "x") +
geom_label_repel(data = subset(nba, PTS < 18),
nudge_y = 16...
format statement in a string resource file
...
formatPrice = String.format(context.getString(R.string.price), unitPrice/100.0)
Log.d("Double_CharSequence", "$formatPrice")
D/Double_CharSequence: Price :U$ 99,90
For an even better result, we can do so
<string name="price_to_string">Price:U$ %1$s</string>
var formatPrice: CharSe...
Is String.Format as efficient as StringBuilder
...ill a copy on the Way Back Machine:
http://web.archive.org/web/20090417100252/http://jdixon.dotnetdevelopersjournal.com/string_concatenation_stringbuilder_and_stringformat.htm
At the end of the day it depends whether your string formatting is going to be called repetitively, i.e. you're doing ...
How do I generate a constructor from class fields using Visual Studio (and/or ReSharper)?
...orts System
Imports EnvDTE
Imports EnvDTE80
Imports EnvDTE90
Imports EnvDTE100
Imports System.Diagnostics
Public Module ConstructorEditor
Public Sub StubConstructors()
'adds stubs for all of the constructors in the current class's base class
Dim selection As TextSelection = DTE....
Overloading Macro on Number of Arguments
...
ii (3)
cout << "i = " << i << endl;
ii (100, 103)
cout << "i = " << i << endl;
return 0;
}
Run:
User@Table 13:06:16 /c/T
$ g++ test_overloaded_macros.cpp
User@Table 13:16:26 /c/T
$ ./a.exe
counter = 3
counter = 4
abc = 0
abc = 1...