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How to set environment variables in Python?
...le DEBUSSY to the string 1.
To access this variable later, simply use:
print(os.environ["DEBUSSY"])
Child processes automatically inherit the environment variables of the parent process -- no special action on your part is required.
...
std::unique_lock or std::lock_guard?
... you should use it. Not only it avoids unnecessary overhead but also shows intent to the reader that you will never unlock this guard.
– Stephan Dollberg
Dec 11 '13 at 11:07
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How to create a template function within a class? (C++)
...ct A { template<typename> void f(); }; template<> void A::f<int>() { } for example. You just can't specialize them in class scope, but you can do so well when done in namespace scope. (not to be confused with the scope that the specialization is actually put into: the specializatio...
SCOPE_IDENTITY() for GUIDs?
... ColGuid uniqueidentifier NOT NULL DEFAULT NewSequentialID(),
Col2 int NOT NULL
)
GO
DECLARE @op TABLE (
ColGuid uniqueidentifier
)
INSERT INTO dbo.GuidPk (
Col2
)
OUTPUT inserted.ColGuid
INTO @op
VALUES (1)
SELECT * FROM @op
SELECT * FROM dbo.GuidPk
Reference: Exp...
How and when to use ‘async’ and ‘await’
...details that are going on:
public async Task MyMethodAsync()
{
Task<int> longRunningTask = LongRunningOperationAsync();
// independent work which doesn't need the result of LongRunningOperationAsync can be done here
//and now we call await on the task
int result = await longR...
Drawable image on a canvas
...y_bad_full); if(text.equals("Good")) { cs.drawBitmap(bitmapx, 0, 0, tPaint); } else { cs.drawBitmap(bitmapxx, 0, 0, tPaint); }
– Ahmad Arslan
Feb 10 '14 at 6:06
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Compare two Byte Arrays? (Java)
...
In your example, you have:
if (new BigInteger("1111000011110001", 2).toByteArray() == array)
When dealing with objects, == in java compares reference values. You're checking to see if the reference to the array returned by toByteArray() is the same as the refer...
How to copy part of an array to another array in C#?
...
int[] b = new int[3];
Array.Copy(a, 1, b, 0, 3);
a = source array
1 = start index in source array
b = destination array
0 = start index in destination array
3 = elements to copy
...
Broadcast receiver for checking internet connection in android app
I am developing an android broadcast receiver for checking internet connection.
21 Answers
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Hibernate throws org.hibernate.AnnotationException: No identifier specified for entity: com..domain.
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Thank you! This fixed an annoying NullPointerFromHellException!
– malix
Jul 18 '14 at 21:20
1
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