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What is the difference between class and instance attributes?

Is there any meaningful distinction between: 5 Answers 5 ...
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What are best practices for validating email addresses on iOS 2.0

What is the cleanest way to validate an email address that a user enters on iOS 2.0? 13 Answers ...
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Are Mutexes needed in javascript?

I have seen this link: Implementing Mutual Exclusion in JavaScript . On the other hand, I have read that there are no threads in javascript, but what exactly does that mean? ...
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SQL select only rows with max value on a column [duplicate]

I have this table for documents (simplified version here): 27 Answers 27 ...
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Why does MYSQL higher LIMIT offset slow the query down?

...the first OFFSET + LIMIT records (and take only LIMIT of them). The higher is this value, the longer the query runs. The query cannot go right to OFFSET because, first, the records can be of different length, and, second, there can be gaps from deleted records. It needs to check and count each reco...
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To ternary or not to ternary? [closed]

... share | improve this answer | follow | edited Feb 16 '10 at 1:14 ...
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How to convert latitude or longitude to meters?

If I have a latitude or longitude reading in standard NMEA format is there an easy way / formula to convert that reading to meters, which I can then implement in Java (J9)? ...
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How to use sed to replace only the first occurrence in a file?

...ge number of C++ source files with an extra include directive before any existing #includes. For this sort of task, I normally use a small bash script with sed to re-write the file. ...
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Why does C++11 not support designated initializer lists as C99? [closed]

... be expressed in the program by implementing an appropriate constructor. This is the sort of abstraction C++ promotes. On the other hand the designated initializers feature is more about exposing and making members easy to access directly in client code. This leads to things like having a person of...
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Asynchronous Requests with Python requests

... Note The below answer is not applicable to requests v0.13.0+. The asynchronous functionality was moved to grequests after this question was written. However, you could just replace requests with grequests below and it should work. I've left this ...