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How do you build a Singleton in Dart?
...sible way:
void main() {
var s1 = Singleton.instance;
s1.somedata = 123;
var s2 = Singleton.instance;
print(s2.somedata); // 123
print(identical(s1, s2)); // true
print(s1 == s2); // true
//var s3 = new Singleton(); //produces a warning re missing default constructor and breaks on ...
Flask-SQLAlchemy how to delete all rows in a single table
...e query.
ex.
#for specific value
db.session.query(Model).filter(Model.id==123).delete()
db.session.commit()
Delete Single Record by Object
record_obj = db.session.query(Model).filter(Model.id==123).first()
db.session.delete(record_obj)
db.session.commit()
https://flask-sqlalchemy.palletsprojec...
Is there a simple way to convert C++ enum to string?
Suppose we have some named enums:
34 Answers
34
...
grepping using the “|” alternative operator
...overflow.com/a/6775943/3933332 doesn't have?
– Rizier123
Mar 1 '15 at 5:35
3
@Rizier123 -- look a...
How can I install MacVim on OS X?
I am using OS X 10.9.1 (Mavericks).
4 Answers
4
...
How to get the primary IP address of the local machine on Linux and OS X? [closed]
... solution that would return me the primary (first) IP address of the localhost, other than 127.0.0.1
31 Answers
...
Convert absolute path into relative path given a current directory using Bash
...
$ python -c "import os.path; print os.path.relpath('/foo/bar', '/foo/baz/foo')"
gives:
../../bar
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How to call a stored procedure from Java and JPA
...prepareCall("{call getEmployeeDetails(?, ?)}");
cstmt.setInt("employeeId", 123);
cstmt.setInt("companyId", 456);
ResultSet rs = cstmt.executeQuery();
Reference
JDBC documentation: Java SE 6
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How do you convert Html to plain text?
...e plain text look painful. Do you know how to fix?
– 123iamking
Jun 7 '16 at 7:24
...
What is the parameter “next” used for in Express?
...) {
// check for and maybe do something with req.user
});
Since /users/123 will match the route in your example first, that will first check and find user 123; then /users can do something with the result of that.
Route middleware is a more flexible and powerful tool, though, in my opinion, sin...