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JavaScript check if variable exists (is defined/initialized)
...(Assuming the variable could hold anything (string, int, object, function, etc.))
28 Answers
...
Extract hostname name from string
...uld be considered the root domain (i.e. www.食狮.公司.cn, b.c.kobe.jp, etc.). Read more about it here.
Try:
npm install --save psl
Then with my "extractHostname" implementation run:
let psl = require('psl');
let url = 'http://www.youtube.com/watch?v=ClkQA2Lb_iE';
psl.get(extractHostname(url...
ASP.NET MVC 404 Error Handling [duplicate]
...t(new HttpContextWrapper(Context), rd);
var c = ControllerBuilder.Current.GetControllerFactory().CreateController(rc, "Errors");
c.Execute(rc);
Instead of
IController c = new ErrorsController();
c.Execute(new RequestContext(new HttpContextWrapper(Context), rd));
(Optional)
Explanation:
There ...
Python vs Cpython
...uses CPython as the base; other implementations follow.
What about Jython, etc.?
Jython, IronPython and PyPy are the current "other" implementations of the Python programming language; these are implemented in Java, C# and RPython (a subset of Python), respectively. Jython compiles your Python code ...
AngularJS: Service vs provider vs factory
...those variables/function to ‘service’. We’re simply creating them in order to either use or modify them later.
baseUrl is the base URL that the iTunes API requires
_artist is the artist we wish to lookup
_finalUrl is the final and fully built URL to which we’ll make the call to iTunes
mak...
Explaining Python's '__enter__' and '__exit__'
...
In addition to the above answers to exemplify invocation order, a simple run example
class myclass:
def __init__(self):
print("__init__")
def __enter__(self):
print("__enter__")
def __exit__(self, type, value, traceback):
print("__exit__")
...
git remove merge commit from history
...did a soft reset and I've been able to have something quite like I wanted (order do not match initial expectations).
– Benjamin Toueg
Jul 10 '13 at 18:35
2
...
Difference between app.use and app.get in express.js
...l of them and regardless of HTTP verb used:
GET /
PUT /foo
POST /foo/bar
etc.
app.get(), on the other hand, is part of Express' application routing and is intended for matching and handling a specific route when requested with the GET HTTP verb:
GET /
And, the equivalent routing for your exa...
Correct way to close nested streams and writers in Java [duplicate]
...mplementer a way to track things to close
// assumes this is called in order for nested closeables,
// inner-most to outer-most
protected final <T extends Closeable> T autoClose(T closeable) {
closeables_.add(0, closeable);
return closeable;
}
publi...
Can not connect to local PostgreSQL
... system, they all contain conf.sample files (pg_hba, pg_ident, pg_service, etc) but no .conf files. This should not be the case, correct? Also the directory that should contain .s.PGSQL.5432 is empty. Instead I have a file located at /private/tmp/.s.PGSQL.5432.lock. PS returns postgres processes so ...