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How can I set a website image that will show as preview on Facebook?

...press just scroll down to the bottom of the webpage when in edit mode, and select "featured image" (bottom right side of screen). share | improve this answer | follow ...
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CSS: How to remove pseudo elements (after, before,…)?

... you want to with this line $('p').addClass('no-after'); // replace the p selector with what you need... a working example at : http://www.jsfiddle.net/G2czw/ share | improve this answer ...
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How to check if a particular service is running on Ubuntu

... For Ubuntu (checked with 12.04) You can get list of all services and select by color one of them with 'grep': sudo service --status-all | grep postgres Or you may use another way if you know correct name of service: sudo service postgresql status ...
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convert String to DateTime

...ctive_support extensions, but good luck figuring out which ones to require selectively) – Matt Zukowski Sep 30 '12 at 0:53 2 ...
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How to split a string at the first `/` (slash) and surround part of it in a ``?

...ments, for example to all those implementing a class, just by changing the selector. Demonstration (note that I had to select jQuery in the menu in the left part of jsfiddle's window) share | impro...
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How to implement a queue with three stacks?

... bound of C * K := B_u + C_u + 1 WLOG2, for an n such that |A(n)| > K, select K elements from Q(n). Suppose that 1 of those elements is in A(n + x), for all x >= 0, i.e. the element is always in stack A no matter how many queue operations are done. X := that element Then we can define ...
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jQuery to loop through elements with the same class

...s pretty simple to do this without jQuery these days. Without jQuery: Just select the elements and use the .forEach() method to iterate over them: const elements = document.querySelectorAll('.testimonial'); Array.from(elements).forEach((element, index) => { // conditional logic here.. access el...
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What's the difference between CSS classes .foo.bar (without space) and .foo .bar (with space) [dupli

...nt, .symbol {} Edit: By request the link to the documentation of the CSS selectors. share | improve this answer | follow | ...
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What are App Domains in Facebook Apps?

... domain name. Before you enter your domain, first click on Add Platform, select website, enter your site URL and mobile site url. Save the settings. Thereafter, you can enter the domain name in the App domains field. See more at my blog: http://www.ogbongeblog.com/2014/03/unable-to-add-app-doma...
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Real escape string and PDO [duplicate]

...ing. So if people are building out queries that already have quotes like "SELECT * FROM users WHERE username = '".$conn->quote($username)."'";, the queries will inevitably fail. – user1669496 Jun 11 '14 at 18:05 ...