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How do I make a textbox that only accepts numbers?
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And just because it's always more fun to do stuff in one line...
private void textBox1_KeyPress(object sender, KeyPressEventArgs e)
{
e.Handled = !char.IsDigit(e.KeyChar) && !char.IsControl(e.KeyChar);
}
NOTE: This DOES NOT prevent...
Preloading images with jQuery
..., in my context, I'm using this as follows:
$.post('/submit_stuff', { id: 123 }, function(response) {
$([response.imgsrc1, response.imgsrc2]).preloadImages(function(){
// Update page with response data
});
});
Hopefully this helps someone who comes to this page from Google (as I did) look...
Pure virtual function with implementation
... be provided (base's implementation).
– StackExchange123
Mar 7 at 12:09
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How do I check if a number evaluates to infinity?
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You can use isFinite in window, isFinite(123):
You can write a function like:
function isInfinite(num) {
return !isFinite(num);
}
And use like:
isInfinite(null); //false
isInfinite(1); //false
isInfinite(0); //false
isInfinite(0.00); //false
isInfinite(NaN); /...
What is sharding and why is it important?
...ited applicability.
Besides, the future is probably going to be something fun and exciting like a massive object "cloud" that erases all potential performance limitations, right? :)
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Filter dict to contain only certain keys?
...ent (e.g. in a lambda) this is key observation.
– gae123
Jan 27 '16 at 1:11
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How to mark-up phone numbers?
...e Skype Echo / Sound Test Service, the link would be <a href="skype:echo123?call">Call the Skype Echo / Sound Test Service</a> from msdn.microsoft.com/en-us/library/office/…
– OzBob
Apr 2 '15 at 4:11
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Why is Git better than Subversion?
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Google Tech Talk: Linus Torvalds on git
http://www.youtube.com/watch?v=4XpnKHJAok8
The Git Wiki's comparison page
http://git.or.cz/gitwiki/GitSvnComparsion
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What does “coalgebra” mean in the context of programming?
I have heard the term "coalgebras" several times in functional programming and PLT circles, especially when the discussion is about objects, comonads, lenses, and such. Googling this term gives pages that give mathematical description of these structures which is pretty much incomprehensible to me. ...
What's the strangest corner case you've seen in C# or .NET? [closed]
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I think I showed you this one before, but I like the fun here - this took some debugging to track down! (the original code was obviously more complex and subtle...)
static void Foo<T>() where T : new()
{
T t = new T();
Console.WriteLine(t.ToString...