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How do I declare an array of weak references in Swift?
...T] {
return objects.flatMap { $0.object }
}
func contains(_ object: T) -> Bool {
return self.objects.contains(WeakObject(object: object))
}
func addObject(_ object: T) {
self.objects.formUnion([WeakObject(object: object)])
}
func addObjects(_ obj...
Unable to load DLL (Module could not be found HRESULT: 0x8007007E)
...
From what I remember on Windows the search order for a dll is:
Current Directory
System folder, C:\windows\system32 or c:\windows\SysWOW64 (for 32-bit process on 64-bit box).
Reading from the Path environment variable
In addition I'd check the dependencies of the ...
How might I find the largest number contained in a JavaScript array?
... and getting the 0th value is by far the worst method (and it modifies the order of your array, which may not be desirable). For the others, the difference is negligible unless you're talking millions of indices.
Average results of five runs with a 100,000-index array of random numbers:
reduce took...
Use ffmpeg to add text subtitles [closed]
...ext outfile.mp4
-vf subtitles=infile.srt will not work with -c copy
The order of -c copy -c:s mov_text is important. You are telling FFmpeg:
Video: copy, Audio: copy, Subtitle: copy
Subtitle: mov_text
If you reverse them, you are telling FFmpeg:
Subtitle: mov_text
Video: copy, Audio: copy, Sub...
How to change a table name using an SQL query?
...
Use sp_rename:
EXEC sp_rename 'Stu_Table', 'Stu_Table_10'
You can find documentation on this procedure on MSDN.
If you need to include a schema name, this can only be included in the first parameter (that is, this cannot be use...
How can I use Async with ForEach?
...better solution? If simultaneously, should the results be in original item order or in order of completion? Should it fail on the first failure or wait until all have completed? Etc.
– Stephen Cleary
Oct 17 '19 at 18:01
...
Scala @ operator
...n itself? That would be accomplished with this:
o match {
case x @ Some(_) => println(x)
case None =>
}
Note that @ can be used at any level, not just at the top level of the matching.
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Class does not implement its superclass's required members
...ype to be Self (Swift's equivalent of Objective-C's instanceType). But in order to do this, I actually need to use a required initializer method.
class Box {
var size: CGSize
init(size: CGSize) {
self.size = size
}
class func factory() -> Self {
return self.init(...
Find MongoDB records where array field is not empty
...unexpected results. For example: db.doc.find({'nums': { $gt: [] }}).hint({ _id: 1 }).count() returns the right number, while db.doc.find({'nums': { $gt: [] }}).hint({ nums: 1 }).count() returns 0.
– wojcikstefan
Mar 4 '17 at 17:51
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How to perform Unwind segue programmatically?
...ability to "unwind" from one view controller somewhere in the presentation order to a much earlier view controller. See WWDC 2012 session 407 for details.
– tobinjim
Dec 9 '12 at 6:55
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