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Why is (object)0 == (object)0 different from ((object)0).Equals((object)0)?
...
The reason the calls behave different is they bind to very different methods.
The == case will bind to the static reference equality operator. There are 2 independent boxed int values created hence they are not the same reference.
In t...
django MultiValueDictKeyError error, how do I deal with it
...proach is pretty common. If you're catching the exception it won't automatically generate a stacktrace. docs.python.org/2/glossary.html#term-eafp
– bjudson
Sep 22 '13 at 21:29
9
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Javascript event handler with parameters
...lements[i]));
It is also possible to use .bind() to add arguments to a callback. Any arguments you pass to .bind() will be prepended to the arguments that the callback itself will have. So, you could do this:
elem.addEventListener('click', function(a1, a2, e) {
// inside the event handler...
differentiate null=True, blank=True in django
...anslating to None in Python) if you set null=True. The docs even say to avoid setting null=True because it allows two different kinds of "blanky" values. I just tested this behaviour with Django 1.8/MySQL 5.6
– Edward D'Souza
Aug 3 '16 at 17:14
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Rollback a Git merge
... Sadly, the here link in the @Hilikus comment is no longer valid. The site claims the content got moved to a book ( git-scm.com/book/en/v2 ) but if so, it is non-trivial to locate in there.
– Jesse Chisholm
Jul 26 '19 at 15:23
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Algorithm to find top 10 search terms
...ncy Estimation Overview
There are some well-known algorithms that can provide frequency estimates for such a stream using a fixed amount of storage. One is Frequent, by Misra and Gries (1982). From a list of n items, it find all items that occur more than n / k times, using k - 1 counters. This is ...
Difference between object and class in Scala
...companion object of class C; note that the companion object is not automatically an instance of C.
Also see Scala documentation for object and class.
object as host of static members
Most often, you need an object to hold methods and values/variables that shall be available without having to fir...
How do you set the startup page for debugging in an ASP.NET MVC application?
...ler to be your default route/view, the code would be:
public static void RegisterRoutes(RouteCollection routes)
{
routes.IgnoreRoute("{resource}.axd/{*pathInfo}");
routes.MapRoute(
"Default", // Route name
"{controller}/{action}/{id}", // URL with pa...
How do I pass the value (not the reference) of a JS variable to a function? [duplicate]
..._selection(i);
});
})(i);
}
By creating an anonymous function and calling it with the variable as the first argument, you're passing-by-value to the function and creating a closure.
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How to use pull to refresh in Swift?
...elf.tableView.reloadData() and self.refreshControl?.endRefreshing() in the callback?
– Qian Chen
Dec 6 '15 at 19:58
Ex...