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How to print out all the elements of a List in Java?
I am trying to print out all the elements of a List , however it is printing the pointer of the Object rather than the value.
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Equivalent of “throw” in R
...them. If the columns don't exist, I want the function to stop and to stop all functions depending on it.
5 Answers
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How to remove css property in jQuery
...$('.className').style.propertyName = '';
BUT I couldn't get it to work at all, so I'm putting it here just FYI.
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Converting Long to Date in Java returns 1970
...ime.Instant // Represent a moment as seen in UTC. Internally, a count of nanoseconds since 1970-01-01T00:00Z.
.ofEpochSecond( 1_220_227_200L ) // Pass a count of whole seconds since the same epoch reference of 1970-01-01T00:00Z.
Know Your Data
People use various precisions in...
django admin - add custom form fields that are not part of the model
... ModelForm class and then declare your extra fields inside that as you normally would. I've also given an example of how you might use these values in form.save():
from django import forms
from yourapp.models import YourModel
class YourModelForm(forms.ModelForm):
extra_field = forms.CharFiel...
How to lock orientation during runtime
Is there a way to lock orientation during runtime? For example I'd like to allow the user to lock the screen to landscape if the user currently in landscape and toggle the menu option.
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SQL to determine minimum sequential days of access?
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@Artem: That was what I initially thought but when I thought about it, if you have an index on (UserId, CreationDate), the records will show up consecutively in the index and it should perform well.
– Mehrdad Afshari
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Queue.Queue vs. collections.deque
...nd collections.deque serve different purposes. Queue.Queue is intended for allowing different threads to communicate using queued messages/data, whereas collections.deque is simply intended as a datastructure. That's why Queue.Queue has methods like put_nowait(), get_nowait(), and join(), whereas co...
Is cout synchronized/thread-safe?
...f particular interest here is the fact that cout is buffered. Even if the calls to write (or whatever it is that accomplishes that effect in that particular implementation) are guaranteed to be mutually exclusive, the buffer might be shared by the different threads. This will quickly lead to corrupt...
How to close IPython Notebook properly?
...desktop application which can show running servers and shut them down.
Finally, we are working on adding:
A config option to automatically shut down the server if you don't use it for a specified time.
A button in the user interface to shut the server down. (We know it's a bit crazy that it has t...