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SQL Joins Vs SQL Subqueries (Performance)?
I wish to know if I have a join query something like this -
8 Answers
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What's the difference of “./configure” option “--build”, “--host” and “--target”?
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As noted in this blog post and alluded to in the GCC Configure Terms, --target only applies when you are compiling toolchains. When you are doing normal cross-compilation of a library or binary you use
--build=the architecture of the bu...
How to test which port MySQL is running on and whether it can be connected to?
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To find a listener on a port, do this:
netstat -tln
You should see a line that looks like this if mysql is indeed listening on that port.
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN
Por...
Restore a postgres backup file using the command line?
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Your first source of reference should be the man page pg_dump(1) as that is what creates the dump itself. It says:
Dumps can be output in script or
archive file formats. Script dumps are
plain-text files containing the SQL
commands required to reconstruct
the database to the st...
How to move an iFrame in the DOM without losing its state?
Take a look at this simple HTML:
8 Answers
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Remove characters except digits from string using Python?
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In Python 2.*, by far the fastest approach is the .translate method:
>>> x='aaa12333bb445bb54b5b52'
>>> import string
>>> all=string.maketrans('','')
>>> nodigs=all.translate(all, string.digits)
>>> x.translate(all, nodigs...
In which order do CSS stylesheets override?
In an HTML header, I've got this:
11 Answers
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Best way to randomize an array with .NET
What is the best way to randomize an array of strings with .NET? My array contains about 500 strings and I'd like to create a new Array with the same strings but in a random order.
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Multiple Models in a single django ModelForm?
Is it possible to have multiple models included in a single ModelForm in django? I am trying to create a profile edit form. So I need to include some fields from the User model and the UserProfile model. Currently I am using 2 forms like this
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jQuery $(“#radioButton”).change(…) not firing during de-selection
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Looks like the change() function is only called when you check a radio button, not when you uncheck it. The solution I used is to bind the change event to every radio button:
$("#r1, #r2, #r3").change(function () {
Or you could give all the radio buttons...