大约有 40,000 项符合查询结果（耗时：0.0788秒） [XML]
Returning an array using C
... use pointers for arrays when you return them. Being a new programmer, I really do not understand this at all, even with the many forums I have looked through.
...
What are the mathematical/computational principles behind this game?
My kids have this fun game called Spot It! The game constraints (as best I can describe) are:
9 Answers
...
How to create directories recursively in ruby?
...c/d.txt, but I do not know if any of these directories exist". My solution allows to use the existing file path ('/a/b/c/d.txt'), and, without separate parsing, create all the folders.
– Vadym Tyemirov
Oct 9 '19 at 4:47
...
Vim Regex Capture Groups [bau -> byau : ceu -> cyeu]
...ter (and more magic-al) is to use \v, meaning that in the pattern after it all ASCII characters except '0'-'9', 'a'-'z', 'A'-'Z' and '_' have a special meaning:
:%s/\v(\w)(\w\w)/\1y\2/g
See:
:help \(
:help \v
share
...
JS: Check if date is less than 1 hour ago?
...terchange, yes. If n hours ago is the same as -n hours in the future, then all future dates are less than one hour ago.
– Mike Samuel
Nov 20 '18 at 0:03
add a comment
...
Create Generic method constraining T to an Enum
... You don't gain much by including the other interfaces because almost all of the built-in value types implement all of those interfaces. This is especially true for constraints on a generic extension method, which is extremely handy for operating on enums, except for the fact that those extensi...
What's the difference between “Write-Host”, “Write-Output”, or “[console]::WriteLine”?
... but not necessarily want to display it on screen. The pipeline will eventually write it to out-default if nothing else uses it first.
Write-Host should be used when you want to do the opposite.
[console]::WriteLine is essentially what Write-Host is doing behind the scenes.
Run this demonstratio...
extract part of a string using bash/cut/split
...
MYVAR="users/joebloggs/domain.com"
Remove the path leaving file name (all characters up to a slash):
echo ${MYVAR##*/}
domain.com
Remove the file name, leaving the path (delete shortest match after last /):
echo ${MYVAR%/*}
users/joebloggs
Get just the file extension (remove all before la...
How do I set up a simple delegate to communicate between two view controllers?
... super.viewDidLoad()
}
@IBAction func btnSendDataPushed(_ sender: UIButton) {
// Call the delegate method from SecondVC
self.delegate?.sendData(data:self.data)
dismiss(animated: true, completion: nil)
}
}
ViewCo...
FFMPEG (libx264) “height not divisible by 2”
...vcodec libx264 -y -an video.mp4 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2"
Basically, .h264 needs even dimensions so this filter will:
Divide the original height and width by 2
Round it up to the nearest pixel
Multiply it by 2 again, thus making it an even number
Add black padding pixels up to this num...