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How to create a custom attribute in C#
...s Enterprise Library. If you look at a code example, you'll see:
/// <summary>
/// blah blah code.
/// </summary>
[DataMember]
[StringLengthValidator(8, RangeBoundaryType.Inclusive, 8, RangeBoundaryType.Inclusive, MessageTemplate = "\"{1}\" must always have \"{4}\" c...
How do I list all loaded assemblies?
... if (property.CanRead){
Response.Write("<br>" + an.ToString() + "." + type.ToString() + "." + property.Name);
}
}
//METHODS
var methods = type.GetMethods();
foreach (Sys...
Checking if a double (or float) is NaN in C++
...e documentation for the -ffast-math option explicitly says that it can result in incorrect output for programs which depend on an exact implementation if IEEE or ISO rules/specifications for math functions. Without that option enabled, using x != x is a perfectly valid and portable way of testing f...
Fully custom validation error message with Rails
...resence_of :address1, message: 'Put some address please'
In your view
<% m.errors.each do |attr, msg| %>
<%= msg %>
<% end %>
If you do instead
<%= attr %> <%= msg %>
you get this error message with the attribute name
address1 Put some address please
if ...
How to check if a user is logged in (how to properly use user.is_authenticated)?
... Peter Rowell pointed out, what may be tripping you up is that in the default Django template language, you don't tack on parenthesis to call functions. So you may have seen something like this in template code:
{% if user.is_authenticated %}
However, in Python code, it is indeed a method in the Us...
How do I Moq a method that has an optional argument in its signature without explicitly specifying i
... setup for Foo.
I don't think it defeats the purpose of specifying a default value. The default value is a convenience for calling code, but I think that you should be explicit in your tests. Say you could leave out specifying the bool parameter. What happens if, in future, someone changes the defa...
Catch Ctrl-C in C
...ler.
Here is a simple example flipping a bool used in main():
#include <signal.h>
static volatile int keepRunning = 1;
void intHandler(int dummy) {
keepRunning = 0;
}
// ...
int main(void) {
signal(SIGINT, intHandler);
while (keepRunning) {
// ...
Edit in June 2017:...
How do I determine whether an array contains a particular value in Java?
...ims that 'Arrays.asList(holidays)' for an 'int[] holidays' returns a 'list<int[]>', and not a 'list<int>'. It just contains one single element. Meaning the Contains doesn't work since it just has one element; the int array.
– Nyerguds
Nov 13 '10 at ...
Only read selected columns
...rite.table(dat, file = "data.txt", row.names = FALSE)
where dat is
dat <- structure(list(Year = 2009:2011, Jan = c(-41L, -41L, -21L), Feb = c(-27L,
-27L, -27L), Mar = c(-25L, -25L, -2L), Apr = c(-31L, -31L, -6L
), May = c(-31L, -31L, -10L), Jun = c(-39L, -39L, -32L), Jul = c(-25L,
-25L, -13L...
Generate random numbers with a given (numerical) distribution
...
@abbas786: Not built in, but the other answers to this question should all work on Python 2.7. You could also look up the Python 3 source for random.choices and copy that, if so inclined.
– Mark Dickinson
...