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Delete with Join in MySQL
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Actually you can use an alias for joined tables, but not for the main table (posts). "DELETE posts FROM posts INNER JOIN projects p ON p.project_id = posts.project_id"
– Weboide
May 29 '12 a...
View/edit ID3 data for MP3 files
...roperties (FirstArtist, Artist, JointedArtists, FirstPerformer) and almost all of them are read-only or deprecated...
– Laserson
Oct 14 '10 at 17:24
3
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How expensive is the lock statement?
I've been experimenting with multi threading and parallel processing and I needed a counter to do some basic counting and statistic analysis of the speed of the processing. To avoid problems with concurrent use of my class I've used a lock statement on a private variable in my class:
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Observer Design Pattern vs “Listeners”
It seems to me that the Observer design pattern as described in GOF is really the same thing as Listeners found in various toolkits. Is there a difference between the concepts, or are Listeners and Observers really the same thing.
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What are commit-ish and tree-ish in Git?
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Identifiers #1-14 are all "commit-ish", because they all lead to commits, but
because commits also point to directory trees, they all ultimately lead to
(sub)directory tree objects, and can therefore also be used as "tree-ish".
#15 can also be us...
Removing rounded corners from a element in Chrome/Webkit
The user-agent stylesheet for Chrome gives a border-radius of 5px to all the corners of a <select> element. I've tried getting rid of this by applying a radius of 0px through my external stylesheet, as well inline on the element itself; I've tried both border-radius:0px and -webkit-borde...
Save icon: Still a floppy disk? [closed]
...hen you need to create PDF. E-mail has a little picture of an envelope, usually. Icons are just icons.
– Welbog
Jun 19 '09 at 19:15
19
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When would I use XML instead of SQL? [closed]
... would be more useful than the approach I've always used, which is storing all of my data in a (My)SQL database and then using PHP/Python/etc. to work with it on the web as needed.
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Override valueof() and toString() in Java enum
...o have spaces in them, but enums can't have spaces in their values so it's all bunched up. I want to override toString() to add these spaces where I tell it to.
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When would you use a WeakHashMap or a WeakReference?
...th user-supplied images, like the
web site design tool I work on.
Naturally you want to cache these
images, because loading them from disk
is very expensive and you want to
avoid the possibility of having two
copies of the (potentially gigantic)
image in memory at once.
Because an...