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Synchronously waiting for an async operation, and why does Wait() freeze the program here
...of async function, without creating deadlock. Here is small example for WinForms app.
Imports System.Threading
Imports System.Runtime.CompilerServices
Public Class Form1
Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
SyncMethod()
End Sub
' waiti...
Using {} in a case statement. Why?
...ic storage duration is not in scope to a point where it is in scope is ill-formed unless the variable has scalar type, class type with a trivial default constructor and a trivial destructor, a cv-qualified version of one of these types, or an array of one of the preceding types and is declared witho...
Why is it a bad practice to return generated HTML instead of JSON? Or is it?
...ramework. I've used this approach many times and till now and found the performance satisfactory.
14 Answers
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Why is parenthesis in print voluntary in Python 2.7?
...and has nothing to do with forward or backward compatibility.
The general form for the print statement in all Python versions before version 3 is:
print expr1, expr2, ... exprn
(Each expression in turn is evaluated, converted to a string and displayed with a space between them.)
But remember th...
What do the python file extensions, .pyc .pyd .pyo stand for?
... make importing it again later easier (and faster).
.pyo: This was a file format used before Python 3.5 for *.pyc files that were created with optimizations (-O) flag. (see the note below)
.pyd: This is basically a windows dll file. http://docs.python.org/faq/windows.html#is-a-pyd-file-the-same-as-...
Error: Jump to case label
... storage duration is not in scope to a
point where it is in scope is ill-formed unless the variable has scalar type, class type with a trivial default
constructor and a trivial destructor, a cv-qualified version of one of these types, or an array of one of the
preceding types and is declared w...
Simple C example of doing an HTTP POST and consuming the response
...reak style) so that's why those lines have \r\n at the end.
A URL has the form of http://host:port/path?query_string
There are two main ways of submitting a request to a website:
GET: The query string is optional but, if specified, must be reasonably short. Because of this the header could just ...
What is a serialVersionUID and why should I use it?
...ce...if it's stored or not, you probably don't care about de-serializing a form object), then you can ignore this.
If you're actually using serialization, it only matters if you plan on storing and retrieving objects using serialization directly. The serialVersionUID represents your class version,...
What are the differences between Deferred, Promise and Future in JavaScript?
...scripts that have networks of dependencies, and providing user feedback to form data in a non-blocking manner.
Indeed, compare the pure callback form of doing something after loading CodeMirror in JS mode asynchronously (apologies, I've not used jQuery in a while):
/* assume getScript has signatu...
What is the right way to override a setter method in Ruby on Rails?
...Rails 4.2 due to this change: github.com/rails/rails/commit/… Previously form helpers would call the untypecast value of the field and not call your custom getter. Now they call your method, and so will produce confusing results in your forms depending on how you're overriding the value.
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