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Django - how to create a file and save it to a model's FileField?
...ld and FieldFile in the Django docs, and especially FieldFile.save().
Basically, a field declared as a FileField, when accessed, gives you an instance of class FieldFile, which gives you several methods to interact with the underlying file. So, what you need to do is:
self.license_file.save(new_na...
JavaScript DOM remove element
...re's a slightly more succinct way of removing an element from the DOM than calling .removeChild(element) on its parent, which is to just call element.remove(). In due course, this will probably become the standard and idiomatic way of removing an element from the DOM.
The .remove() method was added...
Accessing member of base class
...ic name in the constructor definition does this for you.
You don't need to call super(name) from the specialised classes.
Using this.name works.
Notes on use of super.
This is covered in more detail in section 4.9.2 of the language specification.
The behaviour of the classes inheriting from Anim...
What is the difference between include and extend in Ruby?
...nts to the target's metaclass (i.e. the singleton class)
e.g.
if you call Klazz.extend(Mod), now Klazz has Mod's methods (as class methods)
if you call obj.extend(Mod), now obj has Mod's methods (as instance methods), but no other instance of of obj.class has those methods added.
extend is a p...
Need to understand the usage of SemaphoreSlim
...hat there won't be more than 10 workers doing this work at the same time.
Calling WaitAsync on the semaphore produces a task that will be completed when that thread has been given "access" to that token. await-ing that task lets the program continue execution when it is "allowed" to do so. Having...
What is the effect of extern “C” in C++?
... C compiler does not use mangling which c++'s does. So if you want call a c interface from a c++ program, you have to clearly declared that the c interface as "extern c".
– Sam Liao
Jun 25 '09 at 2:28
...
Scala: What is the difference between Traversable and Iterable traits in Scala collections?
...versables don't.
A Traversable has one abstract method: foreach. When you call foreach, the collection will feed the passed function all the elements it keeps, one after the other.
On the other hand, an Iterable has as abstract method iterator, which returns an Iterator. You can call next on an It...
How do you Force Garbage Collection from the Shell?
...n java.lang:type=Memory
#bean is set to java.lang:type=Memory
$>run gc
#calling operation gc of mbean java.lang:type=Memory
#operation returns:
null
$>quit
#bye
Look at the docs on the jmxterm web site for information about embedding this in bash/perl/ruby/other scripts. I've used popen2 in...
Instance attribute attribute_name defined outside __init__
I split up my class constructor by letting it call multiple functions, like this:
6 Answers
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Can I keep Nuget on the jQuery 1.9.x/1.x path (instead of upgrading to 2.x)?
...e 2.0+ track. I assume you'll have to switch to a new nuget package specifically written to support the 'legacy' 1.x version, or copy the script in manually each time.
In any case, I'll update this when I learn more.
Edit:
The package author has stated that both the 1.x and 2.x paths will be supp...