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Rank function in MySQL
...rchar(20), age int, gender char(1));
INSERT INTO person VALUES (1, 'Bob', 25, 'M');
INSERT INTO person VALUES (2, 'Jane', 20, 'F');
INSERT INTO person VALUES (3, 'Jack', 30, 'M');
INSERT INTO person VALUES (4, 'Bill', 32, 'M');
INSERT INTO person VALUES (5, 'Nick', 22, 'M');
INSERT INTO person VALU...
What is the best regular expression to check if a string is a valid URL?
...(?:[0-9a-f]{1,4}:[0-9a-f]{1,4}|(?:[0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])(?:\.(?:[0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])){3})|::(?:[0-9a-f]{1,4}:){5}(?:[0-9a-f]{1,4}:[0-9a-f]{1,4}|(?:[0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])(?:\.(?:[0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]...
How to make code wait while calling asynchronous calls like Ajax [duplicate]
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answered Dec 25 '12 at 14:31
DogbertDogbert
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Best way to handle list.index(might-not-exist) in python?
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edited Jan 25 '10 at 14:32
answered Jan 25 '10 at 14:02
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When should null values of Boolean be used?
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answered Jun 25 '12 at 7:53
JB NizetJB Nizet
613k7878 gold badges10641064 silver badges11381138 bronze badges
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Get time in milliseconds using C#
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answered Oct 25 '10 at 16:05
RedFilterRedFilter
149k3333 gold badges263263 silver badges268268 bronze badges
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How can I get every nth item from a List?
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answered Mar 25 '09 at 17:33
mqpmqp
61.6k1313 gold badges8888 silver badges122122 bronze badges
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How to remove the first and the last character of a string
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answered Nov 25 '13 at 14:57
DietergDieterg
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Can you have multiple $(document).ready(function(){ … }); sections?
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edited Aug 25 '09 at 12:40
answered Aug 25 '09 at 11:47
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Only read selected columns
...+ header = TRUE)
Year Jan Feb Mar Apr May Jun
1 2009 -41 -27 -25 -31 -31 -39
2 2010 -41 -27 -25 -31 -31 -39
3 2011 -21 -27 -2 -6 -10 -32
Change "integer" to one of the accepted types as detailed in ?read.table depending on the real type of data.
data.txt looks like this:
$ cat dat...