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What is the real overhead of try/catch in C#?
...
Three points to make here:
Firstly, there is little or NO performance penalty in actually having try-catch blocks in your code. This should not be a consideration when trying to avoid having them in your application. The performance hit only comes into play when an exception is thrown....
Real life example, when to use OUTER / CROSS APPLY in SQL
...I've used both of these approaches (ROW OVER and CROSS APPLY) with both performing well in various scenarios, but I've never understood why they perform differently. That article was sent from the heavens!! The focus on proper indexing matching the order by directions helped in a big way for queri...
What is the difference between linear regression and logistic regression?
...hours, etc.
Equation
Linear regression gives an equation which is of the form Y = mX + C,
means equation with degree 1.
However, logistic regression gives an equation which is of the form
Y = eX + e-X
Coefficient interpretation
In linear regression, the coefficient interpretation of independen...
How do you concatenate Lists in C#?
...solution worked for me.
namespace TestProject
{
public partial class Form1 :Form
{
public Form1()
{
InitializeComponent();
List<string> FirstList = new List<string>();
FirstList.Add("1234");
FirstList.Add("4567");...
What is the appropriate HTTP status code response for a general unsuccessful request (not an error)?
...turn 2xx the client can assume the order was accepted, regardless of any information you send in the body.
From RESTful Web Services Cookbook:
One common mistake that some web services make is to return a status
code that reflects success (status codes from 200 to 206 and from 300
to 307) b...
Any good boolean expression simplifiers out there? [closed]
... The website doesn't seem that good for simplifying boolean formula's when they get a bit more complex. Try this one: (((NOT C) AND (NOT A)) OR ((NOT B) AND (NOT C) AND (NOT D) AND (NOT A)) OR ((NOT B) AND (NOT C) AND D AND A) OR (B AND C AND (NOT D) AND (NOT A)) OR (B AND C AND D AND...
How can I prevent the backspace key from navigating back?
...is code works on all browsers and swallows the backspace key when not on a form element, or if the form element is disabled|readOnly. It is also efficient, which is important when it is executing on every key typed in.
$(function(){
/*
* this swallows backspace keys on any non-input eleme...
lenses, fclabels, data-accessor - which library for structure access and mutation is better
...braries also provide a bunch of extra combinators on top, and usually some form of template haskell machinery to automatically generate lenses for the fields of simple record types.
With that in mind, we can turn to the different implementations:
Implementations
fclabels
fclabels is perhaps the ...
CORS - What is the motivation behind introducing preflight requests?
...anism. Yes these services could already be abused by a malicious or non-conforming user agent (and CORS does nothing to change this), but in a world with CORS the preflight mechanism provides an extra 'sanity check' so that clients and servers don't break because the underlying rules of the web have...