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Cannot push to Heroku because key fingerprint

I am new to Rails, and I was trying to deploy a very simple app to Heroku. This is the second app that I deploy, and the first one I was able to do it just fine. However I am having some issues with this one. Whenever I " git push heroku master ", I get this error: ...
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How to get current language code with Swift?

... Alexander Pacha 6,71733 gold badges5050 silver badges8282 bronze badges answered Jul 25 '17 at 9:36 raedraed 3,581...
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How to copy a dictionary and only edit the copy

...hank you! – fxstein Feb 10 '15 at 3:05 8 This actually should be marked as the correct answer; Th...
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Getting the first and last day of a month, using a given DateTime object

I want to get the first day and last day of the month where a given date lies in. The date comes from a value in a UI field. ...
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What is object serialization?

What is meant by "object serialization"? Can you please explain it with some examples? 14 Answers ...
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Can virtual functions have default parameters?

If I declare a base class (or interface class) and specify a default value for one or more of its parameters, do the derived classes have to specify the same defaults and if not, which defaults will manifest in the derived classes? ...
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Should I use Java's String.format() if performance is important?

We have to build Strings all the time for log output and so on. Over the JDK versions we have learned when to use StringBuffer (many appends, thread safe) and StringBuilder (many appends, non-thread-safe). ...
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Why dict.get(key) instead of dict[key]?

...'}. – TitanFighter Sep 16 '17 at 18:05 8 ...
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Should developers have administrator permissions on their PC

Should developers have administrator permissions on their PC or is giving them power user access sufficient? 22 Answers ...
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Can I use Objective-C blocks as properties?

Is it possible to have blocks as properties using the standard property syntax? 8 Answers ...