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Fatal error: unexpectedly found nil while unwrapping an Optional values [duplicate]
...e is first set. In these cases, it
is useful to remove the need to check and unwrap the optional’s value
every time it is accessed, because it can be safely assumed to have a
value all of the time.
These kinds of optionals are defined as implicitly unwrapped
optionals. You write an im...
Why does C++11's lambda require “mutable” keyword for capture-by-value, by default?
... it's called. This is the difference between an object orientated function and a function using a global variable, effectively.
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How to give border to any element using css without adding border-width to the whole width of elemen
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outline:1px solid white;
This won't add the extra width and height.
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How can I pad a String in Java?
...
Apache StringUtils has several methods: leftPad, rightPad, center and repeat.
But please note that — as others have mentioned and demonstrated in this answer — String.format() and the Formatter classes in the JDK are better options. Use them over the commons code.
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Use numpy array in shared memory for multiprocessing
...he multiprocessing module. The difficulty is using it like a numpy array, and not just as a ctypes array.
5 Answers
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Can't push to GitHub because of large file which I already deleted
...at file. The problem is that the file is present in the history.
This command changes the hashes of your commits which can be a real problem, especially on shared repositories. It should not be performed without understanding the consequences.
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Difference between “\n” and Environment.NewLine
...form. Or sending text in package that will be received by a unix platform. And in a few months .net will be running on Unix platforms. It already has begun
– John Demetriou
May 1 '15 at 13:36
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Easy way to print Perl array? (with a little formatting)
...ectory contains " . join(', ', <*>) . "\n";
– Randall
Apr 4 '13 at 19:03
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When serving JavaScript files, is it better to use the application/javascript or application/x-javas
The whole question fits in the title. And to add some context: I'm not asking what is the best according to what the specs are saying, but rather what works the best given the mix of browsers deployed nowadays.
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How do you get the “object reference” of an object in java when toString() and hashCode() have been
...urantee, but the default implementation from Sun. Things like s = "Hello" and t = "Hello" would probably result in s and t having the same identityHashCode as they really are the same object.
– TofuBeer
Feb 24 '09 at 15:23
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