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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...
Making a request to a RESTful API using python
...ld take optional "params" parameter which is usually a dict carrying query string. If a payload is necessary to fetch data (such as the example posted in question), then "requests.post" needs to be used. Additionally using "json" library makes it easier to parse json response.
–...
What is the use case of noop [:] in bash?
...can discover that : ignores them. Mostly, you are just making the shell do extra work in expanding * to a list of files in the current directory; it won't actually affect how the script works.
– chepner
Nov 5 '14 at 14:48
...
What's the difference between Unicode and UTF-8? [duplicate]
...uses UTF-16LE encoding internally as the memory storage format for Unicode strings, it considers this to be the natural encoding of Unicode text. In the Windows world, there are ANSI strings (the system codepage on the current machine, subject to total unportability) and there are Unicode strings (s...
What is the difference between return and return()?
...t starts the return statement, not a function.
As has been mentioned, the extra parentheses affect evaluation order, but are not used to "execute" the function named return. That is why these lines work without any problems:
return (1);
var a = (1);
They are, in effect, identical to these lines:...
How to copy files from 'assets' folder to sdcard?
...ivate void copyAssets() {
AssetManager assetManager = getAssets();
String[] files = null;
try {
files = assetManager.list("");
} catch (IOException e) {
Log.e("tag", "Failed to get asset file list.", e);
}
if (files != null) for (String filename : files) {
...
Static variables in JavaScript
... the static variable is never going to be falsey (false, 0, null, or empty string)
– Kip
Sep 23 '11 at 17:25
3
...
Biggest differences of Thrift vs Protocol Buffers?
...tocol Buffers allow "extensions" - you can extend an external proto to add extra fields, while still allowing external code to operate on the values. There is no way to do this in Thrift
I find Protocol Buffers much easier to read
Basically, they are fairly equivalent (with Protocol Buffers slight...
Can I obtain method parameter name using Java reflection?
...mments) there are a few options:
use arg0, arg1, arg2 etc.
use intParam, stringParam, objectTypeParam, etc.
use a combination of the above - the former for non-primitive types, and the latter for primitive types.
don't show argument names at all - just the types.
...
Animate text change in UILabel
...abel Extension Solution
extension UILabel{
func animation(typing value:String,duration: Double){
let characters = value.map { $0 }
var index = 0
Timer.scheduledTimer(withTimeInterval: duration, repeats: true, block: { [weak self] timer in
if index < value.count {
...