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Email Address Validation in Android on EditText [duplicate]

How can we perform Email Validation on edittext in android ? I have gone through google & SO but I didn't find out a simple way to validate it. ...
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In Python, what is the difference between “.append()” and “+= []”?

...d will add one item to the list, while += will copy all elements of right-hand-side list into the left-hand-side list. Update: perf analysis Comparing bytecodes we can assume that append version wastes cycles in LOAD_ATTR + CALL_FUNCTION, and += version -- in BUILD_LIST. Apparently BUILD_LIST outw...
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add created_at and updated_at fields to mongoose schemas

Is there a way to add created_at and updated_at fields to a mongoose schema, without having to pass them in everytime new MyModel() is called? ...
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How do I iterate through table rows and cells in JavaScript?

... go through each row(<tr>), knowing/identifying the row(<tr>), and iterate through each column(<td>) of each row(<tr>), then this is the way to go. var table = document.getElementById("mytab1"); for (var i = 0, row; row = table.rows[i]; i++) { //iterate through rows //...
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Should IBOutlets be strong or weak under ARC?

...veloping exclusively for iOS 5 using ARC. Should IBOutlet s to UIView s (and subclasses) be strong or weak ? 11 Answer...
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Executing elements inserted with .innerHTML

...e's a script that does: exec_body_scripts: function(body_el) { // Finds and executes scripts in a newly added element's body. // Needed since innerHTML does not run scripts. // // Argument body_el is an element in the dom. function nodeName(elem, name) { return elem.nodeName &&am...
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What's the difference between event.stopPropagation and event.preventDefault?

They seem to be doing the same thing... Is one modern and one old? Or are they supported by different browsers? 7 Answers...
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Automapper - how to map to constructor parameters instead of property setters

... Looks like CreateMap<> should be PersonViewModel and not PersonProfile. As well as in the second code block PersonModel should be PersonViewModel. – Ben Sampica Aug 7 '19 at 19:30 ...
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Add icon to submit button in twitter bootstrap 2

...gs/tag_button.asp for more information on what the button tag is meant for and its cross browser effect. Use this with caution, especially with forms. – Matenia Rossides Mar 3 '12 at 7:22 ...
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Difference between Key, Primary Key, Unique Key and Index in MySQL

When should I use KEY , PRIMARY KEY , UNIQUE KEY and INDEX ? 8 Answers 8 ...