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Set focus on TextBox in WPF from view model
...odel(exampleViewModel.cs):write the following
Messenger.Default.Send<string>("focus", "DoFocus");
now in your View.cs(not the XAML the view.xaml.cs) write the following in the constructor
public MyView()
{
InitializeComponent();
Messenger.Default.Registe...
jQuery .scrollTop(); + animation
...
To do this, you can set a callback function for the animate command which will execute after the scroll animation has finished.
For example:
var body = $("html, body");
body.stop().animate({scrollTop:0}, 500, 'swing', function() {
alert("Finished animating");
});
Where that alert ...
Should I return a Collection or a Stream?
...ood example of this are the APIs in java.nio.file.Files:
static Stream<String> lines(path)
static List<String> readAllLines(path)
Not only does readAllLines have to hold the entire file contents in memory in order to store it into the result list, it also has to read the file to t...
Why does Stream not implement Iterable?
... great code-noise. But then this is Java and we have tolerated the List<String> list = new ArrayList(Arrays.asList(array)) for a long time :) Although the powers that be could just offer us all List<String> list = array.toArrayList(). But the real absurdity, is that by encouraging ever...
Calculate the execution time of a method
....Diagnostics;
using System.Threading;
class Program
{
static void Main(string[] args)
{
Stopwatch stopWatch = new Stopwatch();
stopWatch.Start();
Thread.Sleep(10000);
stopWatch.Stop();
// Get the elapsed time as a TimeSpan value.
TimeSpan ts = ...
Executing elements inserted with .innerHTML
...e's a script that does:
exec_body_scripts: function(body_el) {
// Finds and executes scripts in a newly added element's body.
// Needed since innerHTML does not run scripts.
//
// Argument body_el is an element in the dom.
function nodeName(elem, name) {
return elem.nodeName &&am...
MySQL - Using COUNT(*) in the WHERE clause
...he clause that They Don't Bother To Teach Properly on sql courses or books and knowing about it generally the sign that the coder has progressed beyond novice level.
– Cruachan
Nov 19 '08 at 12:59
...
In Python, what is the difference between “.append()” and “+= []”?
...d will add one item to the list, while += will copy all elements of right-hand-side list into the left-hand-side list.
Update: perf analysis
Comparing bytecodes we can assume that append version wastes cycles in LOAD_ATTR + CALL_FUNCTION, and += version -- in BUILD_LIST. Apparently BUILD_LIST outw...
'too many values to unpack', iterating over a dict. key=>string, value=>list
I am getting the 'too many values to unpack' error. Any idea how I can fix this?
8 Answers
...
What is “assert” in JavaScript?
...ion code.
Suppose you had a function that was supposed to always accept a string. You'd want to know if someone called that function with something that wasn't a string. So you might do:
assert(typeof argumentName === "string");
...where assert would throw an error if the condition were false.
...