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UIView's frame, bounds, center, origin, when to use what?
...ew has the properties frame , bounds , center , and origin , and they all seem to be interrelated. Most of the time, I deal with frame when setting the position and size of a UIView . I understand that frame is using global coordinate system and bounds is using coordinate of the local ...
How to find all tables that have foreign keys that reference particular table.column and have values
...
This solution will not only display all relations but also the constraint name, which is required in some cases (e.g. drop constraint):
SELECT
CONCAT(table_name, '.', column_name) AS 'foreign key',
CONCAT(referenced_table_name, '.', referenced_column_n...
Difference between validate(), revalidate() and invalidate() in Swing GUI
...ater.
validate() performs relayout. It means invalid content is asked for all the sizes and all the subcomponents' sizes are set to proper values by LayoutManager.
revalidate() is just sum of both. It marks the container as invalid and performs layout of the container.
UPDATE:
Some code from Com...
How to rollback just one step using rake db:migrate
...Guide for running migrations.
Here's some more:
rake db:migrate - Run all migrations that haven't been run already
rake db:migrate VERSION=20080906120000 - Run all necessary migrations (up or down) to get to the given version
rake db:migrate RAILS_ENV=test - Run migrations in the given environm...
How to determine function name from inside a function
...Bash Reference Manual:
FUNCNAME
An array variable containing the names of all shell functions currently in the execution call stack. The element with index 0 is the name of any currently-executing shell function. The bottom-most element (the one with the highest index) is "main". This variable exis...
How to avoid merge-commit hell on GitHub/BitBucket
...hes Before Merging
If you want to avoid merge commits, you need to ensure all commits are fast-forwards. You do this by making sure your feature branch rebases cleanly onto your line of development before a merge like so:
git checkout master
git checkout -b feature/foo
# make some commits
git re...
I don't understand -Wl,-rpath -Wl,
...separated list of arguments to the linker. So
gcc -Wl,aaa,bbb,ccc
eventually becomes a linker call
ld aaa bbb ccc
In your case, you want to say "ld -rpath .", so you pass this to gcc as -Wl,-rpath,. Alternatively, you can specify repeat instances of -Wl:
gcc -Wl,aaa -Wl,bbb -Wl,ccc
Note tha...
Merging two images in C#/.NET
...
basically i use this in one of our apps:
we want to overlay a playicon over a frame of a video:
Image playbutton;
try
{
playbutton = Image.FromFile(/*somekindofpath*/);
}
catch (Exception ex)
{
return;
}
Image frame;
try...
MVVM in WPF - How to alert ViewModel of changes in Model… or should I?
...
RaisePropertyChanged("ViewModelCopyOfSomeProperty");
}
But typically this is only needed if more than one object will be making changes to the Model's data, which is not usually the case.
If you ever have a case where you don't actually have a reference to your Model property to attach t...
How do I update if exists, insert if not (AKA “upsert” or “merge”) in MySQL?
...
Yeah, I believe SQL Server's equivalent is called MERGE. In general, the concept is often referred to as "UPSERT".
– chaos
Aug 2 '09 at 13:40
3
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