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What is an efficient way to implement a singleton pattern in Java? [closed]
...ent and difficult to understand why it is necessary.
For details : http://www.cs.umd.edu/~pugh/java/memoryModel/DoubleCheckedLocking.html
Now we are sure about evil thread but what about the cruel serialization? We have to make sure even while de-serialiaztion no new object is created
class Foo i...
What is the JavaScript equivalent of var_dump or print_r in PHP? [duplicate]
...f (typeof val.namespaceURI === 'undefined' || val.namespaceURI === 'http://www.w3.org/1999/xhtml') {
// Undefined namespace could be plain XML, but namespaceURI not widely supported
ret = 'HTMLElement("' + val.nodeName + '")';
} else {
ret = 'XML Element("' + va...
How to set the prototype of a JavaScript object that has already been instantiated?
...a.org/en/JavaScript/Reference/Global_Objects/Object/proto. Also see http://www.mail-archive.com/jsmentors@googlegroups.com/msg00392.html for an explanation why there is no Object.setPrototypeOf() and why __proto__ is deprecated.
...
Can you nest html forms?
...e, the HTML5 <input> form attribute can be the solution.
From http://www.w3schools.com/tags/att_input_form.asp:
The form attribute is new in HTML5.
Specifies which <form> element an <input> element belongs to. The value of this attribute must be the id attribute of a <f...
Which is fastest? SELECT SQL_CALC_FOUND_ROWS FROM `table`, or SELECT COUNT(*)
...
According to the following article: https://www.percona.com/blog/2007/08/28/to-sql_calc_found_rows-or-not-to-sql_calc_found_rows/
If you have an INDEX on your where clause (if id is indexed in your case), then it is better not to use SQL_CALC_FOUND_ROWS and use 2 quer...
POST data to a URL in PHP
...l form) it can be done with curl. It will look like this:
$url = 'http://www.someurl.com';
$myvars = 'myvar1=' . $myvar1 . '&myvar2=' . $myvar2;
$ch = curl_init( $url );
curl_setopt( $ch, CURLOPT_POST, 1);
curl_setopt( $ch, CURLOPT_POSTFIELDS, $myvars);
curl_setopt( $ch, CURLOPT_FOLLOWLOCATIO...
Embed SVG in SVG?
...height="100%" viewBox="-100 -100 200 200" version="1.1"
xmlns="http://www.w3.org/2000/svg">
<circle cx="-50" cy="-50" r="30" style="fill:red" />
<image x="10" y="20" width="80" height="80" href="recursion.svg" />
</svg>
...
Return HTTP status code 201 in flask
...his small issue
also here is list of status code followed globally
http://www.w3.org/Protocols/HTTP/HTRESP.html
Hope it helps.
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Favicons - Best practices
... / IE11.
mstile-310x150.png - For Windows 8.1 / IE11.
See http://www.buildmypinnedsite.com/en and http://msdn.microsoft.com/en-gb/library/ie/dn255024%28v=vs.85%29.aspx. -->
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How to create the perfect OOP application [closed]
.... NSpring)
design patterns
SOLID principle
I would like to recomend the www.dimecasts.net as impressive source of free, good quality screencasts which covers all above mentioned topics.
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