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What is the difference between up-casting and down-casting with respect to class variable
What is the difference between up-casting and down-casting with respect to class variable?
10 Answers
...
Using jquery to get element's position relative to viewport
...: 0; font: medium monospace; background-color: #EEE8AA; }
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<!-- scroll right and bottom to locate the blue square -->
<div id="element"></div>
<div id="log"></div>
...
How to detect escape key press with pure JS or jQuery?
...e-msg"></span>
keyCode is becoming deprecated
It seems keydown and keyup work, even though keypress may not
$(document).keyup(function(e) {
if (e.key === "Escape") { // escape key maps to keycode `27`
// <DO YOUR WORK HERE>
}
});
Which keycode for escape ke...
Remove non-ascii character in string
...es on those:
http://www.fileformat.info/info/unicode/char/200B/index.htm
https://en.wikipedia.org/wiki/Left-to-right_mark
Note that although the encoding of the embedded character is UTF-8, the encoding in the regular expression is not. Although the character is embedded in the string as three ...
How do I make an http request using cookies on Android?
... how to do it using the "Form based logon" example in the HttpClient docs:
https://github.com/apache/httpcomponents-client/blob/master/httpclient5/src/test/java/org/apache/hc/client5/http/examples/ClientFormLogin.java
import java.util.ArrayList;
import java.util.List;
import org.apache.http.HttpEnt...
Using lambda expressions for event handlers
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
req.query and req.param in ExpressJS
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
Qt events and signal/slots
... the user focus the button and change the number by pressing the "up" and "down" keyboard keys. Otherwise the button should function like a normal QPushButton (it can be clicked, etc). In Qt this is done by creating your own little reusable "component" (subclass of QPushButton), which reimplements Q...
How to suppress Pandas Future warning ?
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
Hidden Features of Xcode
...tion ⌥ Shift ⇧ + <First letter of a Group name>
If you hold down the three keys above, you can quickly jump to groups in the left (Groups and Files) page by pressing the first letter of a groups name. For example, Control ⌃Option ⌥Shift ⇧T takes you to Targets and Control ⌃Opt...