Tutorial by Topics: q

This section provides an overview of what linq-to-sql is, and why a developer might want to use it. It should also mention any large subjects within linq-to-sql, and link out to the related topics. Since the Documentation for linq-to-sql is new, you may need to create initial versions of those r...

Subqueries can appear in different clauses of an outer query, or in the set operation. They must be enclosed in parentheses (). If the result of the subquery is compared to something else, the number of columns must match. Table aliases are required for subqueries in the FROM clause to name th...

from django.contrib.postgres.fields import ArrayField class ArrayField(base_field, size=None, **options) FooModel.objects.filter(array_field_name__contains=[objects, to, check]) FooModel.objects.filter(array_field_name__contained_by=[objects, to, check]) Note that although the size param...

SQLALCHEMY'S PHILOSOPHY From the SQLAlchemy Website: SQL databases behave less like object collections the more size and performance start to matter; object collections behave less like tables and rows the more abstraction starts to matter. SQLAlchemy aims to accommodate both of these principl...

PyQt is a Python binding to the popular cross-platform Qt application framework commonly used to make graphical applications. PyQt4 supports Qt4 and PyQt5 supports Qt5. It runs on all platforms supported by Qt (Windows, OS X, Linux, iOS and Android). The bindings are implemented as a set of Python...

VersionMajor ChangesRelease Date3.02004-06-183.7.11SELECT max(x), y2012-03-203.8.3CTEs2014-02-11

JSONField(**options) Django's JSONField actually stores the data in a Postgres JSONB column, which is only available in Postgres 9.4 and later. JSONField is great when you want a more flexible schema. For example if you want to change the keys without having to do any data migratio...

Quaternion.LookRotation(Vector3 forward [, Vector3 up]); Quaternion.AngleAxis(float angles, Vector3 axisOfRotation); float angleBetween = Quaternion.Angle(Quaternion rotation1, Quaternion rotation2);

ParameterDetailshandleurl to a custom image for the handleanglethe starting rotation for the element.rotationCenterXposition about which the element will be rotatedrotationCenterYposition about which the element will be rotatedstepan angle in degrees that the rotation will snap to if the shift key ...

window.requestAnimationFrame(callback); window.webkitRequestAnimationFrame(callback); window.mozRequestAnimationFrame(callback); ParameterDetailscallback"A parameter specifying a function to call when it's time to update your animation for the next repaint." (https://developer.mo...

This section provides an overview of what plsql is, and why a developer might want to use it. It should also mention any large subjects within plsql, and link out to the related topics. Since the Documentation for plsql is new, you may need to create initial versions of those related topics. ...

dq = deque() # Creates an empty deque dq = deque(iterable) # Creates a deque with some elements dq.append(object) # Adds object to the right of the deque dq.appendleft(object) # Adds object to the left of the deque dq.pop() -> object # Removes and returns the righ...

The version syntax doesn't allow us to guard off versions that don't exist yet, so this is a reminder for somebody to go back and edit them in once it lands( RE: Perl 5.26 ). The version guards rather need to have a "future" classification for tentative features that might be available ...

You will need the Qt SQL plugin corresponding to the type given to QSqlDatabase::addDatabase If you don't have the required SQL plugin, Qt will warn you that it can't find the requested driver If you don't have the required SQL plugin you will have to compile them from the Qt source