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How to create NS_OPTIONS-style bitmask enumerations in Swift?
...tocol extensions take care of most of the boilerplate for these, which are now imported as a struct that conforms to OptionSetType. (RawOptionSetType has disappeared as of Swift 2 beta 2.) The declaration is far simpler:
struct MyOptions : OptionSetType {
let rawValue: Int
static let None ...
Is it good practice to NULL a pointer after deleting it?
... Imagaine a mainainer comming back a year later and seeing foo deleted. He now believes he can re-use the pointer unfortunately he may miss the second delete (it may not even be in the same function) and now the re-use of the pointer now gets trashed by the second delete. Any access after the second...
Is using Random and OrderBy a good shuffle algorithm?
...dex];
elements[swapIndex] = elements[i];
}
}
This will now only do as much work as it needs to.
Note that in both cases, you need to be careful about the instance of Random you use as:
Creating two instances of Random at roughly the same time will yield the same sequence of ra...
Null coalescing in powershell
... evaluated
Null Conditional Assignment
$x = $null
$x ??= 100 # $x is now 100
$x ??= 200 # $x remains 100
Ternary Operator
$true ? "this value returned" : "this expression not evaluated"
$false ? "this expression not evaluated" : "this value returned"
Previous Versions:
No need for ...
How do I uniquely identify computers visiting my web site?
... code snippet. This document does not show how to implement it. I want to know how do I implement this so I can track unique users for my site.
– Oliver
Jul 27 '17 at 8:16
12
...
Unable to type in Visual Studio
...ws button + R
Type %temp% in the text box.
Press enter
Run window image
Now you will see your all temp file. Just press Ctrl+A to select all files
in the temp folder. Now delete all of them. some files will not be deleted. Just skip them.
Now Open Your visual studio and try to edit syntax. I hop...
Is there a way to crack the password on an Excel VBA Project?
...assword protected, and it seems there's a lack of documentation... no-one knows the passwords.
22 Answers
...
Java Reflection: How to get the name of a variable?
...s added to Java 8. Parameter (a special class of local variable) names are now available via reflection. Among other purposes, this can help to replace @ParameterName annotations used by dependency injection containers.
shar...
AutoLayout with hidden UIViews?
... this as the accepted answer? It's been available for three release cycles now.
– Ryan Romanchuk
Feb 13 '18 at 6:02
1
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Convert Pandas column containing NaNs to dtype `int`
...
In v0.24, you can now do df = df.astype(pd.Int32Dtype()) (to convert the entire dataFrame, or) df['col'] = df['col'].astype(pd.Int32Dtype()). Other accepted nullable integer types are pd.Int16Dtype and pd.Int64Dtype. Pick your poison.
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