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How to calculate time in hours between two dates in iOS

How can I calculate the time elapsed in hours between two times (possibly occurring on different days) in iOS? 5 Answers ...
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Comprehensive beginner's virtualenv tutorial? [closed]

...ps://web.archive.org/web/20160404222648/https://iamzed.com/2009/05/07/a-primer-on-virtualenv/ share | improve this answer | follow | ...
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Mail multipart/alternative vs multipart/mixed

When creating email messages you are supposed to set the Content-Type to multipart/alternative when sending HTML and TEXT or multipart/mixed when sending TEXT and attachments. ...
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Getting only Month and Year from SQL DATE

...which the date is in. NOTE: In SQL Server 2008, You will still have the TIME attached as 00:00:00.000 This is not exactly the same as "removing" any notation of day and time altogether. Also the DAY set to the first. e.g. 2009-10-01 00:00:00.000 ...
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How to download an entire directory and subdirectories using wget?

...cess the files through a browser. The base URLs for all the files is the same like 8 Answers ...
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CSS customized scroll bar in div

...sts no cross-browser scroll bar CSS styling definitions. The W3C article I mention at the end has the following statement and was recently updated (10 Oct 2014): Some browsers (IE, Konqueror) support the non-standard properties 'scrollbar-shadow-color', 'scrollbar-track-color' and others. These ...
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Write lines of text to a file in R

... If I have several threads all of which I would like to add lines to the same file? (The issue being is that you can't have more then one connection to a file, If I am not mistaken) Thanks. – Tal Galili Mar 18 '10 at 15:02 ...
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Find and replace with sed in directory and sub directories

... Your find should look like that to avoid sending directory names to sed: find ./ -type f -exec sed -i -e 's/apple/orange/g' {} \; share | improve this answer | ...
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use Winmerge inside of Git to file diff

Is there a way to use Winmerge inside of git to do Diffs? 8 Answers 8 ...
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Float vs Decimal in ActiveRecord

Sometimes, Activerecord data types confuse me. Err, often. One of my eternal questions is, for a given case, 3 Answers ...