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Real life example, when to use OUTER / CROSS APPLY in SQL
... doubled_number_plus_one
FROM master..spt_values
CROSS APPLY (SELECT 2 * CAST(number AS BIGINT)) CA1(doubled_number)
CROSS APPLY (SELECT doubled_number + 1) CA2(doubled_number_plus_one)
4) Unpivoting more than one group of columns
Assumes 1NF violating table structure....
CREATE TABLE T
...
Difference between private, public, and protected inheritance
...: Implicit conversions from the derived to the base won't work, and static_cast from the base to the derived won't work either.
Only members/friends of a class can see private inheritance, and only members/friends and derived classes can see protected inheritance.
public inheritance
IS-A inher...
C++ deprecated conversion from string constant to 'char*'
...on from const char* to char* is generally not possible without an explicit cast for safety reasons. But for backwards compatibility with C the language C++ still allows assigning a string literal to a char* and gives you a warning about this conversion being deprecated.
So, somewhere you are missin...
How to set DialogFragment's width and height?
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@jmaculate - Quick question: when you are casting to (android.view.WindowManager.LayoutParams), what are you casting it from? I was puzzled when choosing the correct import for LayoutParams appearing in the first 3 lines of the function. Ended up choosing (android.vi...
Can a C# class inherit attributes from its interface?
...; interfaceType.GetCustomAttributes(attributeType, true))).
Distinct().Cast<T>();
}
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Why doesn't Java allow generic subclasses of Throwable?
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Yes, but why isn't it flagged as "unsafe" then, as with casts for example?
– eljenso
Feb 1 '09 at 19:17
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How do you bind an Enum to a DropDownList control in ASP.NET?
...l.DropDownListFor(o => o.EnumProperty, Enum.GetValues(typeof(enumtype)).Cast<enumtype>().Select(x => new SelectListItem { Text = x.ToString(), Value = ((int)x).ToString() }))
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Overriding == operator. How to compare to null? [duplicate]
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ReferenceEquals emits a method call though, while casting to object will cause the compiler to just emit instructions to compare the references for equality. ... But that probably counts as evil micro-optimization.
– dtb
Nov 18 '10 at 2...
Convert integer to string Jinja
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I found the answer.
Cast integer to string:
myOldIntValue|string
Cast string to integer:
myOldStrValue|int
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How to select rows that have current day's timestamp?
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Simply cast it to a date:
SELECT * FROM `table` WHERE CAST(`timestamp` TO DATE) == CAST(NOW() TO DATE)
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