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delete map[key] in go?
... That crashes unless the key is present. I've added another solution based on your idea.
– user181548
Nov 18 '09 at 6:22
1
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Check if OneToOneField is None in Django
...n < 3.2, hasattr will swallow all exceptions that happen during the database lookup, and not just DoesNotExist. This is probably broken, and not what you want.
– Pi Delport
Mar 22 '13 at 12:45
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R programming: How do I get Euler's number?
...epresents e^2.
This works because exp is the exponentiation function with base e.
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What are some good resources for learning about Artificial Neural Networks? [closed]
...ation may prove instructive. This is a widely studied problem with a large base of literature outside of neural networks, and there are plenty of lecture notes in numerical optimization available on the web. To start, most people use simple gradient descent, but this can be much slower and less effe...
Emacs, switch to previous window
...to try using windmove which lets you navigate to the window of your choice based on geometry. I have the following in my .emacs file to change windows using C-x arrow-key.
(global-set-key (kbd "C-x <up>") 'windmove-up)
(global-set-key (kbd "C-x <down>") 'windmove-down)
(global-set-key (...
Private setters in Json.Net
... memberSerialization)
{
//TODO: Maybe cache
var prop = base.CreateProperty(member, memberSerialization);
if (!prop.Writable)
{
var property = member as PropertyInfo;
if (property != null)
{
var hasPrivateSetter ...
AngularJS toggle class using ng-class
...
As alternate solution, based on javascript logic operator '&&' which returns the last evaluation, you can also do this like so:
<i ng-class="autoScroll && 'icon-autoscroll' || !autoScroll && 'icon-autoscroll-disabled'"&g...
Best practice for Django project working directory structure
...t, excluded from VCS. It's used to
store media/static files and sqlite database during development. Everything in
tmp could be deleted anytime without any problems.
Virtualenv
I prefer virtualenvwrapper and place all venvs into ~/.venvs directory,
but you could place it inside tmp/ to keep it togeth...
Difference between is and as keyword
...sages of both the keywords, you will get the difference easily.
C# Code:
BaseClass baseclassInstance = new DerivedClass();
DerivedClass derivedclassInstance;
if (baseclassInstance is DerivedClass)
{
derivedclassInstance = (DerivedClass)baseclassInstance;
// do something on derivedclassInsta...
Calling remove in foreach loop in Java [duplicate]
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Just as a side-note, that should work fine with any base-class list, but wouldn't be portable to more esoteric structures (like a self-sorting sequence, for example--in general, anywhere the ordinal for a given entry could change between list iterations).
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