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qmake: could not find a Qt installation of ''
... qt5base-dev qtdeclarative5-dev qt5-qmake qt5-default qttools5-dev-tools And then check using: qtchooser -print-env
– Salil
Jan 25 '16 at 23:42
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configure: error: C compiler cannot create executables
... you need to launch it, go into its preferences, select the Downloads tab, and click "Install" next to the Command Line Tools package.
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Undo working copy modifications of one file in Git?
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what's the difference between HEAD and HEAD^?
– hasen
Mar 28 '09 at 22:06
63
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Why doesn't 'ref' and 'out' support polymorphism?
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UPDATE: I used this answer as the basis for this blog entry:
Why do ref and out parameters not allow type variation?
See the blog page for more commentary on this issue. Thanks for the great question.
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Let's suppose you have classes Animal, Mammal, Reptile, Giraffe, Turtle and Ti...
How do I check if a number evaluates to infinity?
...lert(x === Infinity); displays "true". (Admittedly that's an obscure case, and anyone who decides to redefine Infinity, NaN etc should expect odd things to happen.)
– LukeH
Jan 18 '11 at 13:49
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How can I check if a background image is loaded?
...http://picture.de/image.png)');
});
this will create new image in memory and use load event to detect when the src is loaded.
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Using openssl to get the certificate from a server
...certificate of a remote server, which I can then use to add to my keystore and use within my java application.
11 Answers
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How to find NSDocumentDirectory in Swift?
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Apparently, the compiler thinks NSSearchPathDirectory:0 is an array, and of course it expects the type NSSearchPathDirectory instead. Certainly not a helpful error message.
But as to the reasons:
First, you are confusing the argument names and types. Take a look at the function definition:
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Check if a variable is of function type
...swered Sep 9 '11 at 2:24
Alex GrandeAlex Grande
6,85311 gold badge2323 silver badges2727 bronze badges
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convert String to DateTime
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DateTime.strptime allows you to specify the format and convert a String to a DateTime.
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