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Should I instantiate instance variables on declaration or in the constructor?
...the compiler:
{
a = new A();
}
Check Sun's explanation and advice
From this tutorial:
Field declarations, however, are not part of any method, so they cannot be executed as statements are. Instead, the Java compiler generates instance-field initialization code automatically and puts it...
In Java, when should I create a checked exception, and when should it be a runtime exception? [dupli
... the cheaper it is to fix it, I prefer CheckedExceptions for this reason.
From a philosophical point of view, a method call is a contract to some degree between the caller and the called. Since the compiler enforces the types of parameters that are passed in, it seems symmetrical to let it enforce...
Has anyone ever got a remote JMX JConsole to work?
...ge: Everytime you restart your java process, you will need to do all steps from 4 - 9 again.
1. You need the putty-suite for your Windows machine from here:
http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html
At least the putty.exe
2. Define one free Port on your linu...
Merge a Branch into Trunk
I'm facing a peculiar problem with SVN merge . I want to merge from a dev branch to trunk.
We have multiple dev branches cut off the trunk at the same time.
...
Find and Replace Inside a Text File from a Bash Command
...nvoke sed to do an in-place edit due to the -i option. This can be called from bash.
If you really really want to use just bash, then the following can work:
while read a; do
echo ${a//abc/XYZ}
done < /tmp/file.txt > /tmp/file.txt.t
mv /tmp/file.txt{.t,}
This loops over each line, doi...
Easy way to dismiss keyboard?
...is is actually guaranteed to work, or is just a non-guaranteed side effect from calling an API in a way that it's not documented to work.
– JosephH
Sep 14 '10 at 4:28
3
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Git - deleted some files locally, how do I get them from a remote repository
...No downloading is necessary; you just need to extract the content you want from the repo at your fingertips.
If you haven't committed the deletion, just check out the files from your current commit:
git checkout HEAD <path>
If you have committed the deletion, you need to check out the file...
In Python, how do you convert a `datetime` object to seconds?
...
Consider using: datetime.datetime.utcfromtimestamp(0) I've used this to get the 'epoch' easily. Note that epoch is not always the same on all systems.
– D. A.
Nov 5 '13 at 20:04
...
Disable a method in a ViewSet, django-rest-framework
...tending ModelViewSet, why not just use whatever you need? So for example:
from rest_framework import viewsets, mixins
class SampleViewSet(mixins.RetrieveModelMixin,
mixins.UpdateModelMixin,
mixins.DestroyModelMixin,
viewsets.GenericViewSe...
Using {} in a case statement. Why?
...ed in the C++ draft standard section 6.1 Labeled statement) and we can see from section 6.7 paragraph 3 that jumping pass a declaration is not allowed in many cases, including those with an initialization:
It is possible to transfer into a block, but not in a way that bypasses declarations with ...