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How to start new activity on button click
In an Android application, how do you start a new activity (GUI) when a button in another activity is clicked, and how do you pass data between these two activities?
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MongoDB and “joins” [duplicate]
I'm sure MongoDB doesn't officially support "joins". What does this mean?
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On select change, get data attribute value
The following code returns 'undefined'...
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When to use next() and return next() in Node.js
Scenario : Consider the following is the part of code from a node web app.
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Jquery If radio button is checked
...uttons at the moment so that the user can decide whether they need postage included in the price or not:
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Why do I need to override the equals and hashCode methods in Java?
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Joshua Bloch says on Effective Java
You must override hashCode() in every class that overrides equals(). Failure to do so will result in a violation of the general contract for Object.hashCode(), which will prevent your class from functioning properly in conjunction with all hash-based col...
Cookies vs. sessions
I started using PHP a couple of months ago. For the sake of creating a login system for my website, I read about cookies and sessions and their differences (cookies are stored in the user's browser and sessions on the server). At that time, I preferred cookies (and who does not like cookies?!) and j...
When to use setAttribute vs .attribute= in JavaScript?
Has a best-practice around using setAttribute instead of the dot ( . ) attribute notation been developed?
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When to use single quotes, double quotes, and backticks in MySQL
I am trying to learn the best way to write queries. I also understand the importance of being consistent. Until now, I have randomly used single quotes, double quotes, and backticks without any real thought.
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How do I get the n-th level parent of an element in jQuery?
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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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