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Difference between len() and .__len__()?
...han meets the eye, and generally should not be called directly.
It was decided at some point long ago getting the length of something should be a function and not a method code, reasoning that len(a)'s meaning would be clear to beginners but a.len() would not be as clear. When Python started __len_...
How do I handle the window close event in Tkinter?
...u can use the protocol method to install a handler for this protocol (the widget must be a Tk or Toplevel widget):
Here you have a concrete example:
import tkinter as tk
from tkinter import messagebox
root = tk.Tk()
def on_closing():
if messagebox.askokcancel("Quit", "Do you want to quit?"):...
How many and which are the uses of “const” in C++?
...
Use const for copy-on-write classes, to make the compiler help you to decide when and when not you need to copy.
struct MyString {
char * getData() { /* copy: caller might write */ return mData; }
char const* getData() const { return mData; }
};
Explanation: You might want to share data...
Why can I access private variables in the copy constructor?
...g the "Why" of this - focusing too much on reiterating what behaviour's valid. "access modifiers work on class level, and not on object level." - yes, but why?
The overarching concept here is that it's the programmer(s) designing, writing and maintaining a class who is(are) expected to understand ...
What kind of Garbage Collection does Go use?
...
Plans for Go 1.4+ garbage collector:
hybrid stop-the-world/concurrent collector
stop-the-world part limited by a 10ms deadline
CPU cores dedicated to running the concurrent collector
tri-color mark-and-sweep algorithm
non-generational
non-compacting
fully precise
in...
.NET 4.0 has a new GAC, why?
...nct Global Assembly Cache (GAC), you will have to manage each of them individually.
In .NET Framework 4.0, the GAC went through a few changes. The GAC was split into two, one for each CLR.
The CLR version used for both .NET Framework 2.0 and .NET Framework 3.5 is CLR 2.0. There was no need in the p...
getViewTypeCount and getItemViewType methods of ArrayAdapter
... contacts application you may want even rows to have pictures on the left side and odd rows to have pictures on the right. In that case, you would use:
@Override
public int getViewTypeCount() {
return 2;
}
@Override
public int getItemViewType(int position) {
return position % 2;
}
The fr...
JavaScript inheritance: Object.create vs new
...l super in the child's constructor: SomeBaseClass.call(this). Check this fiddle: jsfiddle.net/NhQGB
– ChrisRich
Oct 28 '12 at 10:08
...
How do I set a cookie on HttpClient's HttpRequestMessage
...post to an endpoint that requires login in the form of an HTTP cookie that identifies an account (this is only something that is #ifdef 'ed out of the release version).
...
How to create materialized views in SQL Server?
...ince views are quite common in any database
Next, a table. This should be identical to the view in columns and data. This will store a snapshot of the view data.
Then, a procedure that truncates the table, and reloads it based on the current data in the view.
Finally, a job that triggers the proce...