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Union Vs Concat in Linq
...rences, thus they all are considered different. When you cast to base type X, reference is not changed.
If you will override Equals and GetHashCode (used to select distinct items), then items will not be compared by reference:
class X
{
public int ID { get; set; }
public override bool Equ...
Difference between fold and reduce?
...tween fold and reduce . Fold seems to do the same thing but takes an extra parameter. Is there a legitimate reason for these two functions to exist or they are there to accommodate people with different backgrounds? (E.g.: String and string in C#)
...
How to compare strings in Bash
...
Using variables in if statements
if [ "$x" = "valid" ]; then
echo "x has the value 'valid'"
fi
If you want to do something when they don't match, replace = with !=. You can read more about string operations and arithmetic operations in their respective document...
In HTML I can make a checkmark with ✓ . Is there a corresponding X-mark?
Is there a corresponding X mark to ✓ ( ✓ )? What is it?
4 Answers
4
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git rebase, keeping track of 'local' and 'remote'
...ometimes have the impression that they swap sides from one commit to the next.
4 Answers
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What's the difference(s) between .ToList(), .AsEnumerable(), AsQueryable()?
... type and the compile-time type are changed.
Let me show this with some examples. I've got this little method that reports the compile-time type and the actual type of an object (courtesy Jon Skeet):
void ReportTypeProperties<T>(T obj)
{
Console.WriteLine("Compile-time type: {0}", typeof...
What is the most efficient way of finding all the factors of a number in Python?
Can someone explain to me an efficient way of finding all the factors of a number in Python (2.7)?
22 Answers
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How do you convert a byte array to a hexadecimal string, and vice versa?
How can you convert a byte array to a hexadecimal string, and vice versa?
45 Answers
4...
wkhtmltopdf: cannot connect to X server
... using wkthmltopdf to convert html to pdf documents on-the-fly on my linux web server. The program originally needed X11 or similar X server to run correctly, but through many requests by developers to have this run on servers without GUI, I am pretty sure it runs a virtual X server in the stati...
How to efficiently build a tree from a flat structure?
...fic object. Enumerate through all the objects and find their parent if it exists and update its parent pointer accordingly.
class MyObject
{ // The actual object
public int ParentID { get; set; }
public int ID { get; set; }
}
class Node
{
public List<Node> Children = new List<...