Firebird 3 and later In Firebird 3 it is easy to create, as it introduced identity columns. In practice it is syntactic sugar for generating a sequence + trigger (as shown for Firebird 2.5) for you. For example create table t1 ( id integer generated by default as identity primary key ) Firebird 3 only … Read more
I only ever expose public fields when they’re (static) constants – and even then I’d usually use a property. By “constant” I mean any readonly, immutable value, not just one which may be expressed as a “const” in C#. Even readonly instance variables (like Result and Message) should be encapsulated in a property in my … Read more
As of Django 1.2, if your form has an attribute named required_css_class, it will be added to BoundField.css_classes for required fields. You can then use CSS to style the required parts of the form as desired. A typical use case: # views.py class MyForm(django.forms.Form): required_css_class=”required” … … /* CSS */ th.required { font-weight: bold; } … Read more
2015-06-01: Updated to reflect @JoeC’s comment about another case when handles are static. Also updated to latest JMH and re-ran on modern hardware. The conclusion stays almost the same. Please do proper benchmarking, it is arguably not that hard with JMH. Once you do that, the answer becomes obvious. It can also showcase the proper … Read more
You can alter the fields in a subclass by overriding the init method: class LoginFormWithoutNickname(LoginForm): def __init__(self, *args, **kwargs): super(LoginFormWithoutNickname, self).__init__(*args, **kwargs) self.fields.pop(‘nickname’)
1.-> for accessing object member variables and methods via pointer to object Foo *foo = new Foo(); foo->member_var = 10; foo->member_func(); 2.. for accessing object member variables and methods via object instance Foo foo; foo.member_var = 10; foo.member_func(); 3.:: for accessing static variables and methods of a class/struct or namespace. It can also be used … Read more
Piping the query to the commandline client outputs a tab separated list with the column names as the first line $ echo “select * from surveys limit 5” | mysql -uroot -pGandalf surveys phone param1 param2 param3 param4 p0 p1 p2 p3 audio4 code time XXXXXXXXX 2008-07-02 11:17:23 XXXXXXXX SAT – – – – – … Read more
attr_accessor is ruby code and is used when you do not have a column in your database, but still want to show a field in your forms. The only way to allow this is to attr_accessor :fieldname and you can use this field in your View, or model, if you wanted, but mostly in your … Read more
Jeremy Hicks, thanks for your extension. I didn`t know how to connect your function to doctrine, but finally i find answer. $doctrineConfig = $this->em->getConfiguration(); $doctrineConfig->addCustomStringFunction(‘FIELD’, ‘DoctrineExtensions\Query\Mysql\Field’); I need FIELD function to order my Entities that i select by IN expression. But you can use this function only in SELECT, WHERE, BETWEEN clause, not in ORDER … Read more
Without collisions, you can do M = [fieldnames(A)’ fieldnames(B)’; struct2cell(A)’ struct2cell(B)’]; C=struct(M{:}); And this is reasonably efficient. However, struct errors on duplicate fieldnames, and pre-checking for them using unique kills performance to the point that a loop is better. But here’s what it would look like: M = [fieldnames(A)’ fieldnames(B)’; struct2cell(A)’ struct2cell(B)’]; [tmp, rows] = … Read more