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What's the difference between a method and a function?
... that data).
(this is a simplified explanation, ignoring issues of scope etc.)
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Database Structure for Tree Data Structure
... its parents, finding the count of child nodes meeting certain conditions, etc. You need to know what information will be needed from the structure to determine the structure that will best fit your needs.
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Usage of protocols as array types and function parameters in swift
...e objects using '===' operator.
I understand this won't work for structs, etc., but it was good enough in my case.
protocol SomeProtocol: class {
func bla()
}
class SomeClass {
var protocols = [SomeProtocol]()
func addElement(element: SomeProtocol) {
self.protocols.append(el...
What is the most efficient way to store a list in the Django models?
...6)
student_number = models.CharField(max_length=128)
# other fields, etc...
friends = models.ManyToManyField('self')
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node.js database [closed]
... be transactional, and have live replication to remote hosting facilities, etc. Then maybe look at something like postgresql. It wouldn't mirror as well, but the node.js driver works pretty well and if you aren't deathly afraid of sql it gets what you want in/out pretty easily.
As for my own opin...
Importing a Maven project into Eclipse from Git
...mm, I had to right-click on the project and use "Team > Share Project", etc., to get EGit to recognize that it is a Git project.
– Brian McCutchon
Mar 9 '16 at 4:07
add a c...
Good reasons NOT to use a relational database?
...it
Easy for users to manipulate with simple tools (i.e. text editors, grep etc)
Efficient storage of binary documents
XML or JSON files on disk
As above, but with a bit more ability to validate the structure.
Spreadsheet / CSV file
Very easy model for business users to understand
Sub...
“ImportError: No module named” when trying to run Python script
... way a separate process does (be it an IPython notebook, external process, etc). IPython will look for modules to import that are not only found in your sys.path, but also on your current working directory. When starting an interpreter from the command line, the current directory you're operating in...
In C#, what happens when you call an extension method on a null object?
...
{
if(obj == null) throw new ArgumentNullException(parameterName);
}
etc
Fundamentally, calls to static calls are very literal - i.e.
string s = ...
if(s.IsNullOrEmpty()) {...}
becomes:
string s = ...
if(YourExtensionClass.IsNullOrEmpty(s)) {...}
where there is obviously no null check.
...
Does Android keep the .apk files? if so where?
...savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
File appsDir = new File("/data/app");
String[] files = appsDir.list();
for (int i = 0 ; i < files.length ; i++ ) {
Log.d(TAG, "File: "+files[i]);
...