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How do I get a TextBox to only accept numeric input in WPF?
..."); //regex that matches disallowed text
private static bool IsTextAllowed(string text)
{
return !_regex.IsMatch(text);
}
If you want to prevent pasting of incorrect data hook up the DataObject.Pasting event DataObject.Pasting="TextBoxPasting" as shown here (code excerpted):
// Use the DataOb...
Which equals operator (== vs ===) should be used in JavaScript comparisons?
...rimitive with an object that evaluates to the same primitive, due to its toString or valueOf method. For example, consider the comparison of a string primitive with a string object created using the String constructor.
"abc" == new String("abc") // true
"abc" === new String("abc") // false
H...
Cross field validation with Hibernate Validator (JSR 303)
... UserRegistrationForm {
@NotNull
@Size(min=8, max=25)
private String password;
@NotNull
@Size(min=8, max=25)
private String confirmPassword;
@NotNull
@Email
private String email;
@NotNull
@Email
private String confirmEmail;
}
The Annotation:
pac...
Alphabet range in Python
...
>>> import string
>>> string.ascii_lowercase
'abcdefghijklmnopqrstuvwxyz'
If you really need a list:
>>> list(string.ascii_lowercase)
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', ...
Occurrences of substring in a string
Why is the following algorithm not halting for me?
(str is the string I am searching in, findStr is the string I am trying to find)
...
Parse date string and change format
I have a date string with the format 'Mon Feb 15 2010'. I want to change the format to '15/02/2010'. How can I do this?
9...
Image Get Requests with AngularJS
I am storing the the source string of an image to be rendered in HTML in the AngularJS controller, however it yields a 404 before the Angular controller is initialized.
...
Why should I prefer single 'await Task.WhenAll' over multiple awaits?
...t1; await t2; await t3;
Console.WriteLine("DoWork1 results: {0}", String.Join(", ", t1.Result, t2.Result, t3.Result));
}
catch (Exception x)
{
// ...
}
}
In this case, if all 3 tasks throw exceptions, only the first one will be caught. Any later exception will be ...
Getting the folder name from a path
...
I would probably use something like:
string path = "C:/folder1/folder2/file.txt";
string lastFolderName = Path.GetFileName( Path.GetDirectoryName( path ) );
The inner call to GetDirectoryName will return the full path, while the outer call to GetFileName() wil...
Reformat XML in Visual Studio 2010
...
Not 100% sure about VS2010, but in VS2015 if you copy and paste a long string of XML into an .XML document, it will automatically reformat it.
("Format Document" is usually the way to go, just mentioning another option.)
...