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Swapping column values in MySQL
...work:
UPDATE swap_test s1, swap_test s2 SET s1.x=s1.y, s1.y=s2.x WHERE s1.id=s2.id;
Essentially, the 1st table is the one getting updated and the 2nd one is used to pull the old data from.
Note that this approach requires a primary key to be present.
This is my test schema:
CREATE TABLE `swap_t...
Javascript/jQuery: Set Values (Selection) in a multiple Select
...lue='" + e + "']").prop("selected", true);
});
Working Example http://jsfiddle.net/McddQ/1/
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Aligning a float:left div to center?
...
you may need to add vertical-align:middle while using display:inline-block.
– ibsenv
May 24 '15 at 10:59
...
Is there a print_r or var_dump equivalent in Ruby / Ruby on Rails?
...1
updated_at: 2009-05-26 22:46:29.501245
current_login_ip: 127.0.0.1
id: "1"
current_login_at: 2009-05-24 20:20:46.627254
login_count: "1"
last_login_ip:
last_login_at:
login: admin
attributes_cache: {}
=> nil
>>
If you want to just preview some string contents, try us...
How to search a specific value in all tables (PostgreSQL)?
...1 at 11:55
Mike Sherrill 'Cat Recall'Mike Sherrill 'Cat Recall'
78.5k1616 gold badges103103 silver badges156156 bronze badges
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Closure in Java 7 [closed]
...nded to have a more concise version of this for single-method interfaces*, called "lambdas". Lambdas have much the same restrictions as anonymous inner classes, although some details vary randomly.
Lambdas are being developed under Project Lambda and JSR 335.
*Originally the design was more flexib...
Is GridFS fast and reliable enough for production?
...the visitors browser if it's already stored in the grid. So, this could be called as a 'traditional cdn schema'.
We have stored and processed 4 million images on this server since it's up and running. The resize and store stuff is done by a simple php script... but for sure, a python script, or som...
iPhone: How to get current milliseconds?
...od for a while and came to realise it can return an earlier value when you call it after couple of miliseconds (e.g. call it consecutively and you might not end up with an increasing sequence)
– Ege Akpinar
Jun 30 '14 at 10:27
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Calling constructors in c++ without new
...y different things.
The first line creates a new object on the stack by calling a constructor of the format Thing(const char*).
The second one is a bit more complex. It essentially does the following
Create an object of type Thing using the constructor Thing(const char*)
Create an object of...
Hg: How to do a rebase like git's rebase
...nd the private changes on top of the new remote changes. This operation is called rebase.
Getting from:
to:
As commented below by steprobe:
In the case where you aren't pulling the changes in, and you have the two branches in your repo, you can do (using keepbranches):
hg up newfeat...