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Why do this() and super() have to be the first statement in a constructor?
...lic MySubClassB(Object[] myArray) {
someMethodOnSuper(); //ERROR super not yet constructed
super(myArray);
}
}
In cases where a parent class has a default constructor the call to super is inserted for you automatically by the compiler. Since every class in J...
Most pythonic way to delete a file which may not exist
...
A more pythonic way would be:
try:
os.remove(filename)
except OSError:
pass
Although this takes even more lines and looks very ugly, it avoids the unnecessary call to os.path.exists() and follows the python convention of overusing exceptions.
It may be worthwhile to write a functio...
What's the difference between lapply and do.call?
...last example supposed to be do.call(cbind, x) the current version gives me Error in do.call(c, x) : 'what' must be a function or character string...
– sindri_baldur
Jul 20 '17 at 20:45
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Can I set max_retries for requests.request?
...t one thing bugs me.
It is possible to get a requests.exception.ConnectionError with a message like:
5 Answers
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Convert date to another timezone in JavaScript
.../10087819/…) Clicking the [Run code snippet] button in IE11 produces an error.
– Vivian River
Jan 25 '19 at 19:37
1
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Xcode 5.1 - No architectures to compile for (ONLY_ACTIVE_ARCH=YES, active arch=x86_64, VALID_ARCHS=i
... I can no longer build my project for the 64-bit simulator, receiving this error:
18 Answers
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Is it safe to ignore the possibility of SHA collisions in practice?
...er chance of exploding due to other things, like mechanical failure, human error in building it or operator error while running it, and we are already taking those chances. If SHA-256 collisions were the only things causing nuclear incidents we would almost certainly have had exactly zero of them so...
Split function equivalent in T-SQL?
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Thanks, I would also like to know. Is there an error here? I wrote this code perhaps 6 years ago and it was working OK since when.
– XOR
Mar 30 '09 at 17:21
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The developers of this app have not set up this app properly for Facebook Login?
...everything, but when I attempt to login with a Facebook account I get this error from Facebook:
19 Answers
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Rails 4 multiple image or file upload using carrierwave
... from saving. Instead the post is saved, and then the ActiveRecord invalid error is thrown for the attachment model only. I think this is because of the create! method. but using create instead just fails silently. Any idea how to have the validation happen on the post reach into the attachments?
...