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Why create “Implicitly Unwrapped Optionals”, since that implies you know there's a value?
... var button: UIButton!
var buttonOriginalWidth: CGFloat!
override func awakeFromNib() {
self.buttonOriginalWidth = self.button.frame.size.width
}
}
Here, you cannot calculate the original width of the button until the view loads, but you know that awakeFromNib will be called b...
How do I replace NA values with zeros in an R dataframe?
...ce(., is.na(.), 0))
The Complete Analysis -
Updated for dplyr 0.8.0: functions use purrr format ~ symbols: replacing deprecated funs() arguments.
Approaches tested:
# Base R:
baseR.sbst.rssgn <- function(x) { x[is.na(x)] <- 0; x }
baseR.replace <- function(x) { replace(x, is...
Best way to reverse a string
...u0301rables" as "selbare\u0301siM seL". This should render just like selbarésiM seL, not selbaŕesiM seL (note the position of the accent), as would the result of most implementations based on code units (Array.Reverse, etc) or even code points (reversing with special care for surrogate pairs).
u...
How is Math.Pow() implemented in .NET Framework?
... things up, I decided to take a look at the implementation of Math.Pow() function. But in .NET Reflector , all I found was this:
...
What is the purpose of a self executing function in javascript?
...nglish' characters A-Z in my program? Well... the Spanish 'ñ' and French 'é' characters can be translated into base characters of 'n' and 'e'.
So someone nice person has written a comprehensive character converter out there that I can include in my site... I include it.
One problem: it has a fu...
How can I merge two commits into one if I already started rebase?
...: Successfully rebased and updated detached HEAD.
– Sérgio
Oct 29 '15 at 15:44
...
Haskell: Lists, Arrays, Vectors, Sequences
... standard library, and for that matter the prelude, is full of useful list functions that should litter your code (foldr,map,filter). Lists are persistant , aka purely functional, which is very nice. Haskell lists aren't really "lists" because they are coinductive (other languages call these strea...
`staticmethod` and `abc.abstractmethod`: Will it blend?
...icmethod decorator... Is there no way around that?
– étale-cohomology
Mar 11 '16 at 19:12
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show 2 more comments
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Convert UTC to local time in Rails 3
...erent timezone then what should be used).
– Marc-André Lafortune
Mar 14 '11 at 15:22
6
The "loca...
Pointer expressions: *ptr++, *++ptr and ++*ptr
...hen increments dereferenced value
And here's a fourth, every bit as much fun as the other three:
(*ptr)++ // effectively forces a dereference, then increments dereferenced value
The first and second will crash if ptr is actually an array identifier. The third and fourth will crash if ptr points...