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Scala list concatenation, ::: vs ++
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325
Legacy. List was originally defined to be functional-languages-looking:
1 :: 2 :: Nil // a li...
Python class inherits object
...ss ClassicSpam: # no base class
... pass
>>> ClassicSpam.__bases__
()
"new" style classes: they have, directly or indirectly (e.g inherit from a built-in type), object as a base class:
>>> class NewSpam(object): # directly inherit from object
... pass
>&g...
Why does Python use 'magic methods'?
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answered Apr 17 '10 at 7:32
Eli BenderskyEli Bendersky
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Vim: Creating parent directories on save
... Damien PolletDamien Pollet
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2
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Avoid browser popup blockers
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answered Apr 6 '10 at 19:32
dthorpedthorpe
33k33 gold badges6969 silver badges114114 bronze badges
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How does C compute sin() and other math functions?
...ion or branching is rather clever. But there's no comment at all!
Older 32-bit versions of GCC/glibc used the fsin instruction, which is surprisingly inaccurate for some inputs. There's a fascinating blog post illustrating this with just 2 lines of code.
fdlibm's implementation of sin in pure C ...
How to convert a unix timestamp (seconds since epoch) to Ruby DateTime?
...cessary instead of DateTime. So use Time.strptime("1318996912345",'%Q').to_f and you will see the milliseconds preserved, while DateTime.strptime("1318996912345",'%Q').to_f does not preserve it.
– skensell
Feb 22 '17 at 15:20
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Regular expression to allow spaces between words
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tl;dr
Just add a space in your character class.
^[a-zA-Z0-9_ ]*$
Now, if you want to be strict...
The above isn't exactly correct. Due to the fact that * means zero or more, it would match all of the following cases that one would not usually mean to match:
An empty string...
jquery-ui sortable | How to get it work on iPad/touchdevices?
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mochimochi
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How to use performSelector:withObject:afterDelay: with primitive types in Cocoa?
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NSValue (the superclass of NSNumber) will wrap anything you give it. If you want to wrap an instance of 'struct foo' called 'bar', you'd do...