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Count, size, length…too many choices in Ruby?
...
In most cases (e.g. Array or String) size is an alias for length.
count normally comes from Enumerable and can take an optional predicate block. Thus enumerable.count {cond} is [roughly] (enumerable.select {cond}).length -- it can of course bypass the i...
How to handle command-line arguments in PowerShell
...hem from console if not available or stop script execution:
param (
[string]$server = "http://defaultserver",
[Parameter(Mandatory=$true)][string]$username,
[string]$password = $( Read-Host "Input password, please" )
)
Inside the script you can simply
write-output $server
since a...
Immutable vs Unmodifiable collection
...ects themselves may still be mutable - creating an immutable collection of StringBuilder doesn't somehow "freeze" those objects.
Basically, the difference is about whether other code may be able to change the collection behind your back.
...
How do I check if a variable exists?
...nd how do you turn the name of variable that possibly doesn't exist into a string?
– SilentGhost
May 9 '09 at 13:27
16
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Use StringFormat to add a string to a WPF XAML binding
...e is effectively what you need:
<TextBlock Text="{Binding CelsiusTemp, StringFormat={}{0}°C}" />
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Difference between 2 dates in SQLite
...day(DateCreated). The former does not account for DST days and will add an extra hour to created dates in Mar-Nov. The latter actually does account for it. stackoverflow.com/questions/41007455/…
– vapcguy
Dec 8 '16 at 19:36
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How much overhead does SSL impose?
I know there's no single hard-and-fast answer, but is there a generic order-of-magnitude estimate approximation for the encryption overhead of SSL versus unencrypted socket communication? I'm talking only about the comm processing and wire time, not counting application-level processing.
...
Making the Android emulator run faster
...ndows:
Install "Intel x86 Emulator Accelerator (HAXM)" => SDK-Manager/Extras
Install "Intel x86 Atom System Images" => SDK-Manager/Android 2.3.3
Go to the Android SDK root folder and navigate to extras\intel\Hardware_Accelerated_Execution_Manager. Execute file IntelHaxm.exe to install. (in A...
C# member variable initialization; best practice?
...d properties (field initializers cannot) - i.e.
[DefaultValue("")]
public string Foo {get;set;}
public Bar() { // ctor
Foo = "";
}
Other than that, I tend to prefer the field initializer syntax; I find it keeps things localized - i.e.
private readonly List<SomeClass> items = new List<...
Understanding Python's “is” operator
...
Another duplicate was asking why two equal strings are generally not identical, which isn't really answered here:
>>> x = 'a'
>>> x += 'bc'
>>> y = 'abc'
>>> x == y
True
>>> x is y
False
So, why aren't they the same str...