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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...
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;
}
...
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...
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...
Regex expressions in Java, \\s vs. \\s+
..., it makes no difference, since you are replacing everything with an empty string (although it would be better to use \\s+ from an efficiency point of view). If you were replacing with a non-empty string, the two would behave differently.
...
Does Spring Data JPA have any way to count entites using method name resolving?
...ository extends CrudRepository<User, Integer> {
Long countByName(String name);
}
2) The old way, Using @Query annotation.
Example,
public interface UserRepository extends CrudRepository<User, Integer> {
@Query("SELECT COUNT(u) FROM User u WHERE u.name=?1")
Long aMethodNa...
Adding a column to an existing table in a Rails migration
...enerate a new migration (rails generate migration add_email_to_users email:string will do the trick).
It will create a migration file containing line:
add_column :users, email, string
Then do a rake db:migrate and it'll run the new migration, creating the new column.
If you have not yet run the ori...
Is it possible to set a custom font for entire of application?
...ride {
public static void setDefaultFont(Context context,
String staticTypefaceFieldName, String fontAssetName) {
final Typeface regular = Typeface.createFromAsset(context.getAssets(),
fontAssetName);
replaceFont(staticTypefaceFieldName, regular);
...
How to install a specific version of a ruby gem?
Using the command-line gem tool, how can I install a specific version of a gem?
6 Answers
...
Function overloading by return type?
...e modern languages. The usual objection is that in code like
int func();
string func();
int main() { func(); }
you can't tell which func() is being called. This can be resolved in a few ways:
Have a predictable method to determine which function is called in such a situation.
Whenever such a ...