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How to force LINQ Sum() to return 0 while source collection is empty
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That's win for me:
int Total = 0;
Total = (int)Db.Logins.Where(L => L.id == item.MyId).Sum(L => (int?)L.NumberOfLogins ?? 0);
In my LOGIN table, in field NUMBEROFLOGINS some values are NULL and others have an INT number. I sum here tota...
How do you implement a private setter when using an interface?
I've created an interface with some properties.
2 Answers
2
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What's the cause of this FatalExecutionEngineError in .NET 4.5 beta? [closed]
...nge in the C# compiler that relies on the assumption that the JIT works as intended. I think the JIT bug existed in .NET 4.0, but was uncovered by the change in the compiler for .NET 4.5.
I do not think that beforefieldinit is the only issue here. I think it's simpler than that.
The type System....
How to compare type of an object in Python?
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def distance_from_zero(n): if isinstance(n,int) or isinstance(n,float): return abs(n) else: return "Nope" print distance_from_zero(True) This returns a "1" instead of "Nope". How to get around this ?
– dig_123
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What's the difference between --general-numeric-sort and --numeric-sort options in gnu sort
...l-numeric’ Sort
numerically, using the standard C
function strtod to convert a prefix of
each line to a double-precision
floating point number. This allows
floating point numbers to be specified
in scientific notation, like 1.0e-34
and 10e100. The LC_NUMERIC locale
determines the d...
How to use ArrayAdapter
...ivate TextView itemView;
}
public MyClassAdapter(Context context, int textViewResourceId, ArrayList<MyClass> items) {
super(context, textViewResourceId, items);
}
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null)...
Subtract 7 days from current date
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use dateByAddingTimeInterval method:
NSDate *now = [NSDate date];
NSDate *sevenDaysAgo = [now dateByAddingTimeInterval:-7*24*60*60];
NSLog(@"7 days ago: %@", sevenDaysAgo);
output:
7 days ago: 2012-04-11 11:35:38 +0000
Hope it helps
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C++11 range based loop: get item by value or reference to const
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Thanks for the great answer. I guess it should also be pointed out that const auto &x is equivalent to your third choice.
– smg
Apr 16 '15 at 15:11
8
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Is there type Long in SQLite?
I want to create a table with the column type Long instead of Integer . Is it possible?
7 Answers
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bool operator ++ and --
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It comes from the history of using integer values as booleans.
If x is an int, but I am using it as a boolean as per if(x)... then incrementing will mean that whatever its truth value before the operation, it will have a truth-value of true after it (barring o...