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When should we use Observer and Observable?
... end of the process rather than at each small step). This is done through setChanged(). So you just call it when you changed something to the Observable and you want the rest of the Observers to eventually know about it.
Notifying all observers that the specific Observable has changed state. This is...
Sequence contains no matching element
... target.Read = source.Read;
target.ReadRule = source.ReadRule;
// etc
}
That's simpler and more efficient IMO.
Even if you do decide to keep the loop, I have a couple of suggestions:
Get rid of the outer if. You don't need it, as if Count is zero the for loop body will never execute
Us...
Pass data to layout that are common to all pages
...Create a base controller with the desired common data (title/page/location etc) and action initialization...
public abstract class _BaseController:Controller {
public Int32 MyCommonValue { get; private set; }
protected override void OnActionExecuting(ActionExecutingContext filterContext) ...
What is the best workaround for the WCF client `using` block issue?
..., TReturn>(Func<TChannel, TReturn> code)
{
var chanFactory = GetCachedFactory<TChannel>();
TChannel channel = chanFactory.CreateChannel();
bool error = true;
try {
TReturn result = code(channel);
((IClientChannel)channel).Close();
error = false;...
How to emulate C array initialization “int arr[] = { e1, e2, e3, … }” behaviour with std::array?
...ote that decaying is important to allow mixing of T, T&, T const & etc.):
template <typename ...Args> struct all_same { static const bool value = false; };
template <typename S, typename T, typename ...Args> struct all_same<S, T, Args...>
{
static const bool value = std:...
How can I make Array.Contains case-insensitive on a string array?
...the IList interface, this works not only with arrays, but also with lists, etc.
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How do I use define_method to create class methods?
...rify, would you just go singleton_class.define_method :loudly do |message| etc.?
– Joshua Pinter
Dec 19 '19 at 20:23
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Make page to tell browser not to cache/preserve input values
...e noted the html valid form . and for example its not aform inside another etc
– shareef
Aug 25 '16 at 8:37
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getenv() vs. $_ENV in PHP
...or the getenv function, this is because there are three ways that PHP can fetch the environment variable:
Via sapi_getenv (e.g. if it's getting the environment variable from Apache)
If on Windows, from GetEnvironmentVariableA.
If on non-Windows, from the getenv function provided by libc.
As far ...
How to use z-index in svg elements?
...ndex arrays used in the examples below are IDs, x & y position, radii, etc....
var zOrders = {
IDs: circles[0].map(function(cv){ return cv.id; }),
xPos: circles[0].map(function(cv){ return cv.cx.baseVal.value; }),
yPos: circles[0].map(function(cv){ return cv.cy.baseVal.value; }),
...