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Expansion of variables inside single quotes in a command in Bash
...it, but the shell also expands the ANSI C character escapes (like \n for a newline, \t for tab, and \xHH for the character with hexadecimal code HH). Otherwise, however, they behave as single-quoted strings: no parameter or command substitution takes place:
echo $'"Thank you. That\'ll be $4.96, pl...
JPA - Returning an auto generated id after persist()
...ion will thus see the generated ID in the entity.
@Override
public ABC addNewABC(ABC abc) {
abcDao.insertABC(abc);
return abc;
}
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How do you version your database schema? [closed]
...he migration script runs whenever the production code is updated and after new installs.
When I would like to drop something, I do it by removing them from the database install script and the migration script so these obsolete schema elements will be gradually phased out in new installs. With the d...
How to add a primary key to a MySQL table?
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How to get a first place to new 'id' column
– TipVisor
Mar 23 at 15:59
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How to set input type date's default value to today?
The HTML5 input types are great, Opera's new built-in date picker is a breeze, and Chrome has at least supported the new input type with a spin-wheel implementation.
...
CodeIgniter: Create new helper?
...n $var;
}
}
Save this to application/helpers/ . We shall call it "new_helper.php"
The first line exists to make sure the file cannot be included and ran from outside the CodeIgniter scope. Everything after this is self explanatory.
Using the Helper
This can be in your controller, model...
How to use unicode characters in Windows command line?
...
I am a newbie to C++ and can't understand this answer after reading carefully. Can somebody help me about this or make a easier explanation?
– Rick
Jun 6 '18 at 14:13
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Creation timestamp and last update timestamp with Hibernate and MySQL
...e Date updated;
@PrePersist
protected void onCreate() {
created = new Date();
}
@PreUpdate
protected void onUpdate() {
updated = new Date();
}
}
or you can use the @EntityListener annotation on the class and place the event code in an external class.
...
Convert list to dictionary using linq and not worrying about duplicates
...ould do something like this:
// Use the first value in list
var _people = new Dictionary<string, Person>(StringComparer.OrdinalIgnoreCase);
foreach (var p in personList)
{
if (!_people.ContainsKey(p.FirstandLastName))
_people[p.FirstandLastName] = p;
}
// Use the last value in li...
How do I create a branch?
...
Create a new branch using the svn copy command as follows:
$ svn copy svn+ssh://host.example.com/repos/project/trunk \
svn+ssh://host.example.com/repos/project/branches/NAME_OF_BRANCH \
-m "Creating a branch of proje...