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What is the difference between functional and non functional requirement? [closed]

What is the difference between functional and non-functional requirements in the context of designing a software system? ...
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In which order should floats be added to get the most precise result?

...ght, sorting in ascending order (of magnitude) usually improves things somewhat. Consider the case where we're adding single-precision (32 bit) floats, and there are 1 billion values equal to 1 / (1 billion), and one value equal to 1. If the 1 comes first, then the sum will come to 1, since 1 + (1 /...
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What is the difference between HTTP status code 200 (cache) vs status code 304?

... So what's better to have from a speed perspective ... "200 (cache)" or "304" http status messages? – Hank Nov 3 '09 at 3:42 ...
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How to load an ImageView by URL in Android? [closed]

... import java.net.URL; private static final int IO_BUFFER_SIZE = 4 * 1024; what was the last one? – Steve Mar 19 '10 at 12:07 12 ...
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When NOT to use Cassandra?

...to solve specific problems and has its own pros and cons. It is up to you, what problem statement you have and what is the best fitting solution for that problem. I will try to answer your questions one by one in the same order you asked them. Since Cassandra is based on the NoSQL family of databas...
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What does “#define _GNU_SOURCE” imply?

... For exact details on what are all enabled by _GNU_SOURCE, documentation can help. From the GNU documentation: Macro: _GNU_SOURCE If you define this macro, everything is included: ISO C89, ISO C99, POSIX.1, POSIX.2, BSD, SVID, X/Open, ...
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How to Display blob (.pdf) in an AngularJS app

... work. May be i do something wrong. Any thank you. I haven't time to check what it not working and use FileSaver.js – fdrv Mar 30 '16 at 21:26 ...
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MySQL, update multiple tables with one query

... What is the advantage of doing this vs. a transaction? Thanks! – paulkon Oct 31 '14 at 13:34 2 ...
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How can I add a custom HTTP header to ajax request with js or jQuery?

... There are several solutions depending on what you need... If you want to add a custom header (or set of headers) to an individual request then just add the headers property: // Request with custom header $.ajax({ url: 'foo/bar', headers: { 'x-my-custom-hea...
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What is stdClass in PHP?

Please define what stdClass is. 17 Answers 17 ...