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Why is there a difference in checking null against a value in VB.NET and C#?
...also a more standard (than C#'s) interpretation of three-valued logic, as explained here.
The C# team made different assumptions about what NULL means, resulting in the behaviour difference you show. Eric Lippert wrote a blog about the meaning of NULL in C#. Per Eric Lippert: "I also wrote about th...
Most efficient way of making an if-elif-elif-else statement when the else is done the most?
...-elif-elif-else statement in which 99% of the time, the else statement is executed:
5 Answers
...
Command line progress bar in Java
... job done.
The same kind of progress bar you would see using wget under unix.
Is this possible?
15 Answers
...
How to write trycatch in R
...vel/library/base/html/connections.html",
"http://en.wikipedia.org/wiki/Xz",
"xxxxx"
)
readUrl <- function(url) {
out <- tryCatch(
{
# Just to highlight: if you want to use more than one
# R expression in the "try" part then you'll have to
...
Groovy: what's the purpose of “def” in “def x = 0”?
...ng piece of code (taken from the Groovy Semantics Manual page ), why prefix the assignment with the keyword def ?
6 Answe...
Favicon not showing up in Google Chrome [duplicate]
...vicon without cache (thanks @Stanislav).
<link rel="icon" type="image/x-icon" href="favicon.ico?v=2" />
Favicon Usage
How did you import the favicon? How you should add it.
Normal favicon:
<link rel="icon" href="favicon.ico" type="image/x-icon" />
<link rel="shortcut icon" hre...
How to use string.replace() in python 3.x
The string.replace() is deprecated on python 3.x. What is the new way of doing this?
8 Answers
...
How do I determine k when using k-means clustering?
...
You can maximize the Bayesian Information Criterion (BIC):
BIC(C | X) = L(X | C) - (p / 2) * log n
where L(X | C) is the log-likelihood of the dataset X according to model C, p is the number of parameters in the model C, and n is th...
Test if a property is available on a dynamic variable
...cification.
So you should actually try to access the member and catch an exception, if it fails:
dynamic myVariable = GetDataThatLooksVerySimilarButNotTheSame();
try
{
var x = myVariable.MyProperty;
// do stuff with x
}
catch (RuntimeBinderException)
{
// MyProperty doesn't exist
}
...
What are the “standard unambiguous date” formats for string-to-date conversion in R?
...d/or abbreviations, as the conversion will depend on your locale (see the examples in ?strptime and read ?LC_TIME).
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