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Why is Java's SimpleDateFormat not thread-safe? [duplicate]
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SimpleDateFormat stores intermediate results in instance fields. So if one instance is used by two threads they can mess each other's results.
Looking at the source code reveals that there is a Calendar instance field, which is used by operations o...
Why is it string.join(list) instead of list.join(string)?
...he following error:
TypeError: sequence item 0: expected str instance, int found
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How to do a SOAP Web Service call from Java class?
...ethod through HTTP manipulation; and
Parse the returning XML response back into an object.
About the first approach (using wsimport):
I see you already have the services' (entities or other) business classes, and it's a fact that the wsimport generates a whole new set of classes (that are someh...
Can a dictionary be passed to django models on create?
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also objects.create returns a pointer to the new model, with a valid pk filled in. This means you can immediately use it to build related models.
– Tom Leys
Oct 16 '09 at 6:21
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How to fix the flickering in User controls
...BackgroundImage can make it a lot worse.
It starts when the UserControl paints itself. It draws the BackgroundImage, leaving holes where the child control windows go. Each child control then gets a message to paint itself, they'll fill in the hole with their window content. When you have a lot o...
What does an underscore in front of an import statement mean?
...egistered in this way, sqlite3 can be used with the standard library's sql interface in your code like in the example:
db, err := sql.Open("sqlite3", "./foo.db")
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Function return value in PowerShell
... function that performs a number of actions involving provisioning SharePoint Team sites. Ultimately, I want the function to return the URL of the provisioned site as a String so at the end of my function I have the following code:
...
Animate the transition between fragments
...tor xmlns:android="http://schemas.android.com/apk/res/android"
android:interpolator="@android:interpolator/accelerate_quad"
android:valueFrom="0"
android:valueTo="1"
android:propertyName="alpha"
android:duration="@android:integer/config_mediumAnimTime" />
Note that you can c...
In C++, what is a virtual base class?
...r example, let's say we have:
class A
{
public :
foo() ;
int m_iValue ;
} ;
When you'll try to access m_iValue from D, the compiler will protest, because in the hierarchy, it'll see two m_iValue, not one. And if you modify one, say, B::m_iValue (that is the A::m_iValue parent of B...
Cost of exception handlers in Python
...ements:
t = timeit.Timer(stmt=s, setup='a={}'.format(a))
print("a = {}\n{}".format(a,s))
print("%.2f usec/pass\n" % (1000000 * t.timeit(number=100000)/100000))
Result:
a = 1
try:
b = 10/a
except ZeroDivisionError:
pass
0.25 usec/pass
a = 1
if a:
b = 10/a
0.29 ...