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How is the undo tree used in Vim?
...rse all of the nodes in the tree in chronological or reverse-chronological order (which can be a bit confusing, because it can jump arbitrarily between undo branches, but if you do g- long enough you'll always get where you need to go eventually). :earlier and :later take a time descriptor like 7m ...
How to get last key in an array?
...a numerical array, keep in mind that numerical arrays do not have to go in order, or use all the numbers. This will work if you do not explicitly assign to numeric values, but if you do $a[1] = 1; $a[5] = 5; $a[0] = 0; Then you will have an array with keys (1, 5, 0), in that order. count($a) will ...
How to overload std::swap()
...Abrahams: If you specialize (without explicit template arguments), partial ordering will cause it to be a specialization of the vector version and it will be used.
– Davis Herring
Mar 13 '18 at 13:54
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Flask SQLAlchemy query, specify column names
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An example here:
movies = Movie.query.filter(Movie.rating != 0).order_by(desc(Movie.rating)).all()
I query the db for movies with rating <> 0, and then I order them by rating with the higest rating first.
Take a look here: Select, Insert, Delete in Flask-SQLAlchemy
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How can you do paging with NHibernate?
...ed to execute a separate transaction for retrieving the total row count in order to render your pager.
– Kevin Pang
Jan 7 '09 at 0:44
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Seedable JavaScript random number generator
...a random generator function. SeedRandom can be called with no arguments in order to seed the returned random function with the current time, or it can be called with either 1 or 2 non-negative inters as arguments in order to seed it with those integers. Due to float point accuracy seeding with only ...
Fastest way to get the first object from a queryset in django?
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also, first() and last() enforce an ORDER BY clause on a query. It will make the results deterministic but will most probably slow the query down.
– Phil Krylov
Jun 27 '17 at 19:24
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Using column alias in WHERE clause of MySQL query produces an error
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You can only use column aliases in GROUP BY, ORDER BY, or HAVING clauses.
Standard SQL doesn't allow you to
refer to a column alias in a WHERE
clause. This restriction is imposed
because when the WHERE code is
executed, the column value may not yet
be dete...
how to put focus on TextBox when the form load?
... not. Not sure why Tab Index = 0 won't work but there are probably strange order of operations going on while loading the form/showing dialog.
– David Carrigan
Sep 16 '15 at 18:07
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JPA eager fetch does not join
...loading when constructing a customer class with a collection for customer orders. If you retrieved every order for a customer when you wanted to get a customer list this may be a expensive database operation when you only looking for customer name and contact details. Best to leave the db access ti...