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What does a tilde do when it precedes an expression?
... also less relevant now that JavaScript has Array.prototype.includes() and String.prototype.includes(). These return a boolean value. If your target platform(s) support it, you should prefer this for testing for the existence of a value in a string or array.
...
How to bind RadioButtons to an enum?
...tType, object parameter, System.Globalization.CultureInfo culture)
{
string parameterString = parameter as string;
if (parameterString == null)
return DependencyProperty.UnsetValue;
if (Enum.IsDefined(value.GetType(), value) == false)
return DependencyProperty.UnsetValue;
...
How to convert an xml string to a dictionary?
...t reads an xml document from a socket. I have the xml document stored in a string which I would like to convert directly to a Python dictionary, the same way it is done in Django's simplejson library.
...
Is there an easy way to check the .NET Framework version?
...ry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\NET Framework Setup\NDP");
string[] version_names = installed_versions.GetSubKeyNames();
//version names start with 'v', eg, 'v3.5' which needs to be trimmed off before conversion
double Framework = Convert.ToDouble(version_names[version_names.Length -...
Error in Swift class: Property not initialized at super.init call
...out this safety check 1.
Like in this sample
class Shape {
var name: String
var sides : Int
init(sides:Int, named: String) {
self.sides = sides
self.name = named
}
}
class Triangle: Shape {
var hypotenuse: Int
init(hypotenuse:Int) {
super.init(sides...
Fastest way(s) to move the cursor on a terminal command line?
... command, but replace option25. To modify the last ./cmd command, use the !string syntax: !./cmd:s/--option25/--newoption/
Any delimiter may be used in place of / in the substitution.
If editing the previous line, you can use quick substitution: ^--option25^--newoption
Character search. This was men...
Delete rows from a pandas DataFrame based on a conditional expression involving len(string) giving K
...pandas DataFrame and I want to delete rows from it where the length of the string in a particular column is greater than 2.
...
Why is using 'eval' a bad practice?
...a security vulnerability, and it has to do with the trustworthiness of the string it's given as input. If that string comes, in whole or in part, from the outside world, there's a possibility of a scripting attack on your program if you're not careful. But that's thge derangement of an outside attac...
jQuery Set Select Index
...te: .val(3) works as well for this example, but non-numeric values must be strings, so I chose a string for consistency.
(e.g. <option value="hello">Number3</option> requires you to use .val("hello"))
share
...
Reference: mod_rewrite, URL rewriting and “pretty links” explained
... rule. In this example:
The first set of brackets - ([0-9]+) - matches a string with a minimum of 1 character in length and with only numeric values (i.e. 0-9). This can be referenced with $1 in the right hand side of the rule
The second set of parentheses matches a string with a minimum of 1 char...