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Is there any way to put malicious code into a regular expression?
...mance degradation, but where a Thompson‐style NFA has no such problems.
If you only admit patterns that can be solved by DFAs, you can compile them up as such, and they will run faster, possibly much faster. However, it takes time to do this. The Cox paper mentions this approach and its attendant...
What is content-type and datatype in an AJAX request?
... use this to figure out how to populate the success function's parameter.
If you're posting something like:
{"name":"John Doe"}
and expecting back:
{"success":true}
Then you should have:
var data = {"name":"John Doe"}
$.ajax({
dataType : "json",
contentType: "application/json; charse...
Stopping scripters from slamming your website
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How about implementing something like SO does with the CAPTCHAs?
If you're using the site normally, you'll probably never see one. If you happen to reload the same page too often, post successive comments too quickly, or something else that triggers an alarm, make them prove they're human....
PostgreSQL naming conventions
..., etc, the prevalent convention is:
SQL keywords: UPPER CASE
names (identifiers): lower_case_with_underscores
For example:
UPDATE my_table SET name = 5;
This is not written in stone, but the bit about identifiers in lower case is highly recommended, IMO. Postgresql treats identifiers case ins...
How to check if current thread is not main thread
I need to check if the thread running a certain piece of code is the main (UI) thread or not. How can I achieve this?
9 Ans...
How to change the default charset of a MySQL table?
...
If you want to change the table default character set and all character columns to a new character set, use a statement like this:
ALTER TABLE tbl_name CONVERT TO CHARACTER SET charset_name;
So query will be:
ALTER TAB...
Get url parameters from a string in .NET
...'s name says, it's to parse Query Strings, not URLs with query parameters. If you want to do it, you must first split it by ? like this: Url.Split('?') and get last element using (depending on situation and what you need) [0] or LINQ's Last() / LastOrDefault().
– Kosiek
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How to save a plot as image on the disk?
...the (combined) help page for the graphical formats ?png, ?bmp, ?jpeg and ?tiff as well as in the separate help page for ?pdf.
Note however that the image might look different on disk to the same plot directly plotted to your screen, for example if you have resized the on-screen window.
Note that...
Writing Unicode text to a text file?
...ts when you first get them and encoding them as necessary on the way out.
If your string is actually a unicode object, you'll need to convert it to a unicode-encoded string object before writing it to a file:
foo = u'Δ, Й, ק, م, ๗, あ, 叶, 葉, and 말.'
f = open('test', 'w')
f.write(f...
What is an alternative to execfile in Python 3?
...e wrong order. It's actually: exec(object[, globals[, locals]]). Of course if you had the arguments flipped in the original, then 2to3 will produce exactly what you said. :)
– Nathan Shively-Sanders
May 21 '09 at 20:27
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