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Check if a Class Object is subclass of another Class Object in Java
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if (o instanceof Number) {
double d = ((Number)o).doubleValue(); //this cast is safe
}
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Wait until file is unlocked in .NET
...a wrapper aroung a FileStream. While it is not a Stream itself, it can be cast to
/// one (keep in mind that this might throw an exception).
/// </summary>
public class SafeFileStream: IDisposable
{
#region Private Members
private Mutex m_mutex;
private Stream m_stream;
privat...
Which Boost features overlap with C++11?
...down or removed using variadic templates. Some common use cases of Lexical cast can be replaced by std::to_string and std::stoX.
Some Boost libraries are related to C++11 but also have some more extensions, e.g. Boost.Functional/Hash contains hash_combine and related functions not found in C++11, B...
Best way to get identity of inserted row?
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Add
SELECT CAST(scope_identity() AS int);
to the end of your insert sql statement, then
NewId = command.ExecuteScalar()
will retrieve it.
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Row count with PDO
... count($nRows); - count() is an array function :P. I'd also recommend type casting the result from fetchColumn() to an integer. $count = (int) $stmt->fetchColumn()
– Cobby
May 26 '11 at 23:59
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gunicorn autoreload on source change
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Thanks for the reminder. But I don't want to cast my vote on other's success. Why this (unnecessary) hurry? Am I violating some StackOverflow rule? If so please let me know how to remediate.
– Paolo
Dec 19 '13 at 19:10
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What's the best way to trim std::string?
...ctually a second definition which supports locales. This could have been a cast just the same, but I tend to like this better.
EDIT: To address some comments about accepting a parameter by reference, modifying and returning it. I Agree. An implementation that I would likely prefer would be two sets ...
How can I obtain the element-wise logical NOT of a pandas Series?
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NumPy is slower because it casts the input to boolean values (so None and 0 becomes False and everything else becomes True).
import pandas as pd
import numpy as np
s = pd.Series([True, None, False, True])
np.logical_not(s)
gives you
0 False
1 ...
Nullable vs. int? - Is there any difference?
...tions is clearly named logical. Remember, in C# there are no conversions ("casts") between bool and numeric types!
– Jeppe Stig Nielsen
Aug 14 '15 at 10:41
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Using a bitmask in C#
...member, so I make life easier on myself with a FlagsHelper class*:
// The casts to object in the below code are an unfortunate necessity due to
// C#'s restriction against a where T : Enum constraint. (There are ways around
// this, but they're outside the scope of this simple illustration.)
public...