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Why does 'continue' behave like 'break' in a Foreach-Object?
..., it simulates the continue in a loop.
1..100 | ForEach-Object {
if ($_ % 7 -ne 0 ) { return }
Write-Host "$($_) is a multiple of 7"
}
There is a gotcha to be kept in mind when refactoring. Sometimes one wants to convert a foreach statement block into a pipeline with a ForEach-Object cmdl...
Reload django object from database
...
As of Django 1.8 refreshing objects is built in. Link to docs.
def test_update_result(self):
obj = MyModel.objects.create(val=1)
MyModel.objects.filter(pk=obj.pk).update(val=F('val') + 1)
# At this point obj.val is still 1, but the value in the database
# was updated to 2. The ob...
Fast Bitmap Blur For Android SDK
...iginal); //use this constructor for best performance, because it uses USAGE_SHARED mode which reuses memory
final Allocation output = Allocation.createTyped(rs, input.getType());
final ScriptIntrinsicBlur script = ScriptIntrinsicBlur.create(rs, Element.U8_4(rs));
script.setRadius(8f);
script.setInpu...
Android: Bitmaps loaded from gallery are rotated in ImageView
...ntation of the image:
orientation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, 1);
Here's what the orientation values mean:
http://sylvana.net/jpegcrop/exif_orientation.html
So, the most important values are 3, 6 and 8.
If the orientation is ExifInterface.ORIENTATION_ROTATE_90 (which is...
Django set default form values
...
@Phlip: Don't override View.get_form to set initial data. Any CBV with a FormMixin (basically all CBVs that create or edit data) can either use a class-level initial variable (for unchanging defaults) or you can override FormMixin.get_initial() to return ...
Python Unicode Encode Error
..., "utf-8", errors="ignore")
else:
# Assume the value object has proper __unicode__() method
value = unicode(value)
If you would like to read more about why:
http://docs.plone.org/manage/troubleshooting/unicode.html#id1
...
Using generic std::function objects with member functions in one class
...int)> f = std::bind(&Foo::doSomethingArgs, this, std::placeholders::_1, std::placeholders::_2);
Or, if your compiler supports C++11 lambdas:
std::function<void(int,int)> f = [=](int a, int b) {
this->doSomethingArgs(a, b);
}
(I don't have a C++11 capable compiler at hand rig...
Sleep until a specific time/date
... correct number of seconds.
To do this in bash, do the following:
current_epoch=$(date +%s)
target_epoch=$(date -d '01/01/2010 12:00' +%s)
sleep_seconds=$(( $target_epoch - $current_epoch ))
sleep $sleep_seconds
To add precision down to nanoseconds (effectively more around milliseconds) use e....
Convert a Scala list to a tuple?
... I know of, but it's easy enough to make your own, e.g. case class Vec3[A](_1: A, _2: A, _3: A)
– Tom Crockett
Sep 16 '14 at 6:43
...
How can I get a list of all classes within current module in Python?
...
Try this:
import sys
current_module = sys.modules[__name__]
In your context:
import sys, inspect
def print_classes():
for name, obj in inspect.getmembers(sys.modules[__name__]):
if inspect.isclass(obj):
print(obj)
And even b...