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Rails: where does the infamous “current_user” come from?
..., it's something like:
class ApplicationController < ActionController::Base
def current_user
return unless session[:user_id]
@current_user ||= User.find(session[:user_id])
end
end
This assumes that the User class exists, e.g. #{Rails.root}/app/models/user.rb.
Updated: avoid additi...
How can one use multi threading in PHP applications
... a web server environment. Threading in PHP should therefore remain to CLI-based applications only.
Simple Test
#!/usr/bin/php
<?php
class AsyncOperation extends Thread {
public function __construct($arg) {
$this->arg = $arg;
}
public function run() {
if ($this...
Mockito: List Matchers with generics
...List<Bar>>any(List.class)));
Java 8 newly allows type inference based on parameters, so if you're using Java 8, this may work as well:
when(mock.process(Matchers.any()));
Remember that neither any() nor anyList() will apply any checks, including type or null checks. In Mockito 2.x, any...
Best way to trim strings after data entry. Should I create a custom model binder?
...r entered string fields to be trimmed before they're inserted into the database. And since I have many data entry forms, I'm looking for an elegant way to trim all strings instead of explicitly trimming every user supplied string value. I'm interested to know how and when people are trimming stri...
Difference between ObservableCollection and BindingList
...ervableCollection<T> is typically derived for the same reason as its base Collection<T> class: for customizing add/remove items (eg. in a data model collection) rather than adjusting binding features.
Copy vs. wrapping
Both ObservableCollection<T> and BindingList<T> have a...
Difference between webdriver.Dispose(), .Close() and .Quit()
... I also noticed that the IEDrivers that are used for working with IE based automation does not exit if you use driver.close() method. I had to use driver.quit() to terminate it. It is because the quit() method also appears to clean up resources unlike close(), although, in my example, I have a...
Get margin of a View
...in;
edit:
perhaps ViewGroup.MarginLayoutParams will work for you. It's a base class for other LayoutParams.
ViewGroup.MarginLayoutParams lp = (ViewGroup.MarginLayoutParams) view.getLayoutParams();
http://developer.android.com/reference/android/view/ViewGroup.MarginLayoutParams.html
...
What is the scope of variables in JavaScript?
...n have block scope in strict mode.
Overview
Scope is the region of the codebase over which an identifier is valid.
A lexical environment is a mapping between identifier names and the values associated with them.
Scope is formed of a linked nesting of lexical environments, with each level in the nest...
Differences between unique_ptr and shared_ptr [duplicate]
...f you create a unique_ptr<Derived>, then convert it to unique_ptr<Base>, and if Derived is virtual and Base is not, then the pointer will be deleted through the wrong type and there can be undefined behaviour. This can be fixed with an appropriate deleter-type in the unique_ptr<T, Del...
Getting all types that implement an interface
...ng able to activate a type would be when the type returned is derived from base but base is defined in a different assembly from that of derived, an assembly that the calling assembly does not reference.
So say we have:
Class A // in AssemblyA
Class B : Class A, IMyInterface // in AssemblyB
Class...