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Access properties file programmatically with Spring?
...code, there is the @Value annotation:
@Value("${settings.some.property}")
String someValue;
To access placeholders From SPEL use this syntax:
#('${settings.some.property}')
To expose configuration to views that have SPEL turned off, one can use this trick:
package com.my.app;
import java.uti...
How do you effectively model inheritance in a database?
...t elements.
So for example:
class Person {
public int ID;
public string FirstName;
public string LastName;
}
class Employee : Person {
public DateTime StartDate;
}
Would result in tables like:
table Person
------------
int id (PK)
string firstname
string lastname
table Employe...
How to access the GET parameters after “?” in Express?
... answers his own original question! He clearly asked how to access a querystring value IN COMBINATION WITH A POSITIONAL PARAMETER (:id). I have exactly the same issue, and this answer does NOT provide a solution ?!
– Andy Lorenz
Jun 23 at 21:38
...
Storing a Map using JPA
...xample_attributes", joinColumns=@JoinColumn(name="example_id"))
Map<String, String> attributes = new HashMap<String, String>(); // maps from attribute name to value
}
See also (in the JPA 2.0 specification)
2.6 - Collections of Embeddable Classes and Basic Types
2.7 Map Collecti...
How does `is_base_of` work?
...blic:
void bar(int);
private:
void bar(double);
};
int main(int argc, char* argv[])
{
Foo foo;
double d = 0.3;
foo.bar(d); // Compiler error, cannot access private member function
}
The same applies here, the fact that B is a private base does not prevent the check from taking pla...
How to bind multiple values to a single WPF TextBlock?
...
You can use a MultiBinding combined with the StringFormat property. Usage would resemble the following:
<TextBlock>
<TextBlock.Text>
<MultiBinding StringFormat="{}{0} + {1}">
<Binding Path="Name" />
<Bi...
How do I 'svn add' all unversioned files to SVN?
... awk? Awk can do pattern matching: awk '/^[?]/{print $2}'; No need for the extra grep process.
– bdrx
Feb 26 '15 at 13:59
1
...
Add a default value to a column through a migration
..., since change_column is irreversible.
Instead, though it may be a couple extra lines, you should use def up and def down
So if you have a column with no default value, then you should do this to add a default value.
def up
change_column :users, :admin, :boolean, default: false
end
def down
...
How To: Best way to draw table in console app (C#)
...mething like the following:
static int tableWidth = 73;
static void Main(string[] args)
{
Console.Clear();
PrintLine();
PrintRow("Column 1", "Column 2", "Column 3", "Column 4");
PrintLine();
PrintRow("", "", "", "");
PrintRow("", "", "", "");
PrintLine();
Console.Re...
How can I add a column that doesn't allow nulls in a Postgresql database?
...
Or, create a new table as temp with the extra column, copy the data to this new table while manipulating it as necessary to fill the non-nullable new column, and then swap the table via a two-step name change.
Yes, it is more complicated, but you may need to do it...