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ASP.NET MVC Conditional validation
...he Validate method:
public class Person : IValidatableObject
{
public string Name { get; set; }
public bool IsSenior { get; set; }
public Senior Senior { get; set; }
public IEnumerable<ValidationResult> Validate(ValidationContext validationContext)
{
if (IsSenio...
Find nearest latitude/longitude with an SQL query
...
Additionally, it does not take into account the curvature of the earth. This would not be an issue for short search radii. Otherwise Evan's and Igor's answers are more complete.
– John Vance
N...
Gson: How to exclude specific fields from Serialization without annotations
...in the serialized json give it a transient keyword, eg:
private transient String name;
More details in the Gson documentation
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Creating a temporary directory in Windows?
...pPath and GetRandomFileName.
You would need code similar to this:
public string GetTemporaryDirectory()
{
string tempDirectory = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName());
Directory.CreateDirectory(tempDirectory);
return tempDirectory;
}
...
Detect all Firefox versions in JS
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I believe the indexOf string method is way faster than a regular expression.
– Tomáš Zato - Reinstate Monica
Apr 22 '14 at 15:11
...
How do I turn a C# object into a JSON string in .NET?
... public int month;
public int day;
}
public class Lad
{
public string firstName;
public string lastName;
public MyDate dateOfBirth;
}
class Program
{
static void Main()
{
var obj = new Lad
{
firstName = "Markoff",
lastName = "Chane...
pandas: multiple conditions while indexing data frame - unexpected behavior
...ve corresponding special methods which control their behaviour. (In query strings, of course, we're free to apply any parsing we like.)
– DSM
Jan 31 '17 at 3:02
...
Most efficient way to store thousand telephone numbers
...
In what follows, I treat the numbers as integer variables (as opposed to strings):
Sort the numbers.
Split each number into the first five digits and the last five digits.
The first five digits are the same across numbers, so store them just once. This will require 17 bits of storage.
Store the ...
Permission denied (publickey) when SSH Access to Amazon EC2 instance [closed]
...rwise, if ec2-user and root don't work, check with your AMI provider.
Finally, be aware that there are many other reasons why authentication would fail. SSH is usually pretty explicit about what went wrong if you care to add the -v option to your SSH command and read the output, as explained in ma...
Is there a “null coalescing” operator in JavaScript?
... coalescing operator (??) is using a logical OR (||):
var whatIWant = someString || "Cookies!";
There are cases (clarified below) that the behaviour won't match that of C#, but this is the general, terse way of assigning default/alternative values in JavaScript.
Clarification
Regardless of th...