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How can I default a parameter to Guid.Empty in C#?
...id() instead
public void Problem(Guid optional = new Guid())
{
// when called without parameters this will be true
var guidIsEmpty = optional == Guid.Empty;
}
You can also use default(Guid)
default(Guid) also will work exactly as new Guid().
Because Guid is a value type not reference type, ...
What is the difference between user and kernel modes in operating systems?
...al_Descriptor_Table
the segment registers CS, DS, etc., which point to the index of an entry in the GDT.
For example, CS = 0 means the first entry of the GDT is currently active for the executing code.
What can each ring do?
The CPU chip is physically built so that:
ring 0 can do anything
ri...
What is a rune?
...akes 1 ~ 3 bytes, while each rune takes 4 bytes
For string, both len() and index are based on bytes.
For []rune, both len() and index are based on rune (or int32).
Relationships - string & []rune:
When you convert from string to []rune, each utf-8 char in that string becomes a rune.
Similarl...
Add all files to a commit except a single file?
...) To start ignoring changes to a single already versioned file
git update-index --assume-unchanged "main/dontcheckmein.txt"
and to undo that git update-index --no-assume-unchanged "main/dontcheckmein.txt"
github docs to ignore files
2) To completely ignore a specific single file preventing it f...
Postgresql: Conditionally unique constraint
... conditional) UNIQUE constraint - however, you can create a partial unique index. PostgreSQL uses unique indexes to implement unique constraints, so the effect is the same, you just won't see the constraint listed in information_schema.
CREATE UNIQUE INDEX stop_myc ON stop (col_a) WHERE (col_b is N...
jQuery Determine if a matched class has a given id
... //do something with bar
});
I'm glad you solved your problem with index(), what ever works for you.I hope this will help others with the same problem. Cheers :)
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How to lazy load images in ListView in Android
... exception 10-13 09:58:46.768: ERROR/AndroidRuntime(24250): java.lang.ArrayIndexOutOfBoundsException: Array index out of range: 0 10-13 09:58:46.768: ERROR/AndroidRuntime(24250): at java.util.Vector.elementAt(Vector.java:331) 10-13 09:58:46.768: ERROR/AndroidRuntime(24250): at java.util.Vect...
How can I convert an image into Base64 string using JavaScript?
...on firefox 35 on some images, the base64 is different from the base64 that php creates on the same image.
– hanshenrik
Mar 6 '15 at 2:39
1
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Can a C# class inherit attributes from its interface?
...xisting type (to avoid duplication), but it is only valid for property and indexer usage.
As an example:
using System;
using System.ComponentModel;
class Foo {
[AttributeProvider(typeof(IListSource))]
public object Bar { get; set; }
static void Main() {
var bar = TypeDescripto...
Java: Best way to iterate through a Collection (here ArrayList)
...
The first one is useful when you need the index of the element as well. This is basically equivalent to the other two variants for ArrayLists, but will be really slow if you use a LinkedList.
The second one is useful when you don't need the index of the element but ...