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String output: format or concat in C#?
Let's say that you want to output or concat strings. Which of the following styles do you prefer?
31 Answers
...
HTML5 form required attribute. Set custom validation message?
...ly answered. If setCustomValidity is set to anything other than the empty string it will cause the field to be considered invalid; therefore you must clear it before testing validity, you can't just set it and forget.
Further edit
As pointed out in @thomasvdb's comment below, you need to clear the ...
Is it possible to deserialize XML into List?
...")]
public Int32 Id { get; set; }
[XmlElement("name")]
public String Name { get; set; }
}
static class Program
{
static void Main()
{
XmlSerializer ser= new XmlSerializer(typeof(UserList));
UserList list = new UserList();
list.Items.Add(new User { Id = 1...
Removing multiple keys from a dictionary safely
...staggering number of people appear unbothered by this :) I don't mind the extra line for existence checking personally, and it's significantly more readable unless you already know about pop(). On the other hand if you were trying to do this in a comprehension or inline lambda this trick could be ...
How can I change the table names when using ASP.NET Identity?
... to be called User.
public class User : IdentityUser
{
public string PasswordOld { get; set; }
public DateTime DateCreated { get; set; }
public bool Activated { get; set; }
public bool UserRole { get; set; }
}
public class ApplicationDbContext : IdentityD...
Only variables should be passed by reference
...
I agree. There's no point in using string manipulation to parse file paths when you have appropriate APIs to do so.
– gd1
Jan 7 '14 at 7:43
...
Quicksort vs heapsort
...d pivot (yes, there is an overhead to get a good pivot).
static void Main(string[] args)
{
int[] arrToSort = new int[100000000];
var r = new Random();
for (int i = 0; i < arrToSort.Length; i++) arrToSort[i] = r.Next(1, arrToSort.Length);
Console.WriteLine("Press q to quick sort,...
How does Duff's device work?
...nion that is the key to understanding this code.
– Richard Chambers
Apr 20 '13 at 23:03
3
Am I mi...
minimum double value in C/C++
...ion represented by a single character in such a long expression, where the string even says "max", is sure to get someone sooner or later. Either it's stored in a descriptive variable, or use -1 * ... to make it a bit clearer.
– Filip Haglund
Jan 2 '17 at 23:34...
Parse config files, environment, and command-line arguments, to get a single collection of options
...ile(argparse.Action):
def __call__(self,parser,namespace,values,option_string=None):
# I can never remember if `values` is a list all the time or if it
# can be a scalar string; this takes care of both.
if isinstance(values,basestring):
parser.config_files.app...