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Code for a simple JavaScript countdown timer?
...
I wrote this script some time ago:
Usage:
var myCounter = new Countdown({
seconds:5, // number of seconds to count down
onUpdateStatus: function(sec){console.log(sec);}, // callback for each second
onCounterEnd: function(){ alert('counter ended!');} // final action
})...
RequestDispatcher.forward() vs HttpServletResponse.sendRedirect()
... request and response objects, so our old request object is present on the new resource which is going to process our request.
Visually, we are not able to see the forwarded address, it is transparent.
Using the forward() method is faster than sendRedirect.
When we redirect using forward, and ...
What is the difference between a URI, a URL and a URN?
...lative" URL?
– Arne
Apr 28 '14 at 7:51
10
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how does Array.prototype.slice.call() work?
...ects.
So why use Array.prototype? The Array is the object which we create new arrays from (new Array()), and these new arrays are passed methods and properties, like slice. These methods are stored in the [Class].prototype object. So, for efficiency sake, instead of accessing the slice method by (n...
Best introduction to C++ template metaprogramming? [closed]
...
C++ template metaprogramming gives you all kind of new capabilities like passing types or list of types as arguments etc. Most of these capabilities are present in dynamically typed languages like python, with nicer syntax.
– Florian Bösch
...
How to send objects through bundle
...ight, all I need to do is just pass a reference of a list of objects to my new activity. The new activity will take some data from the list and display a selectable ListView. onSelect,the activity will return a result (some data pertaining to the click object) to the host activity. If I understand c...
Advantages of Antlr (versus say, lex/yacc/bison) [closed]
...for left recursion. A better example might be dispatch:
expr ::= expr '.' ID '(' actuals ')' ;
actuals ::= actuals ',' expr | expr ;
Notice that both the expr and the actuals rules are left-recursive. This produces a much more efficient AST when it comes time for code generation because it avoid...
Why is SELECT * considered harmful?
...ELECT * bad practice? Wouldn't it mean less code to change if you added a new column you wanted?
15 Answers
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How do I check if file exists in jQuery or pure JavaScript?
...404 status, without using jQuery
function UrlExists(url)
{
var http = new XMLHttpRequest();
http.open('HEAD', url, false);
http.send();
return http.status!=404;
}
Small changes and it could check for status HTTP status code 200 (success), instead.
EDIT 2: Since sync XMLHttpReques...
What is a proper naming convention for MySQL FKs?
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...