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Email validation using jQuery

I'm new to jQuery and was wondering how to use it to validate email addresses. 35 Answers ...
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Drawing a connecting line between two elements [closed]

How can I drawing a line between two or more elements to connect them? Any combination of HTML/CSS/JavaScript/SVG/Canvas is fine. ...
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How to autosize a textarea using Prototype?

I'm currently working on an internal sales application for the company I work for, and I've got a form that allows the user to change the delivery address. ...
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Button in a column, getting the row from which it came on the Click event handler

...f Objects returned from my DAL. I've also added an extra column which contains a button, the xaml is below. 5 Answers ...
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Is there a builtin identity function in python?

I'd like to point to a function that does nothing: 8 Answers 8 ...
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Understanding Linux /proc/id/maps

I am trying to understand my embedded Linux application's memory use. The /proc/pid/maps utility/file seems to be a good resource for seeing the details. Unfortunately I don't understand all the columns and entries. ...
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How do I get the n-th level parent of an element in jQuery?

... Since parents() returns the ancestor elements ordered from the closest to the outer ones, you can chain it into eq(): $('#element').parents().eq(0); // "Father". $('#element').parents().eq(2); // "Great-grandfather". ...
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MySQL, better to insert NULL or empty string?

...ifferent fields. Some of the fields are optional while some are mandatory. In my DB I have a table which holds all these values, is it better practice to insert a NULL value or an empty string into the DB columns where the user didn't put any data? ...
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How to horizontally center a

How can I horizontally center a <div> within another <div> using CSS? 112 Answers ...
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Constructors in JavaScript objects

... Using prototypes: function Box(color) // Constructor { this.color = color; } Box.prototype.getColor = function() { return this.color; }; Hiding "color" (somewhat resembles a private member variable): function Box(c...