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How do I query if a database schema exists
...ion it has to be able to run multiple times on a given database. Like this:
5 Answers
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iPhone Navigation Bar Title text color
It seems the iOS Navigation Bar title color is white by default. Is there a way to change it to a different color?
32 Answe...
how to find host name from IP with out login to the host
i need to find the host name of a UNIX host whose IP is known with out login to that UNIX host
11 Answers
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hasNext in Python iterators?
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No, there is no such method. The end of iteration is indicated by an exception. See the documentation.
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regex.test V.S. string.match to know if a string matches a regular expression
...x) ) {
// There was a match.
} else {
// No match.
}
Performance
Is there any difference regarding performance?
Yes. I found this short note in the MDN site:
If you need to know if a string matches a regular expression regexp, use regexp.test(string).
Is the difference significant?...
In SQL, what's the difference between count(column) and count(*)?
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count(*) counts NULLs and count(column) does not
[edit] added this code so that people can run it
create table #bla(id int,id2 int)
insert #bla values(null,null)
insert #bla values(1,null)
insert #bla values(null,1)
insert #bla values(1,null)
insert #bla values(null,1)
insert #bla values...
What programming practice that you once liked have you since changed your mind about? [closed]
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+1. I was about to post this same answer. I found some of my old programming assignments on an archive disc a few weeks ago. It all looked the same. There was almost a 1:1 ratio of lines of comments to lines of code.
– Micha...
Why are hexadecimal numbers prefixed with 0x?
...s dealing with a constant (and not an identifier/reserved word). Something is still needed to specify the number base: the x is an arbitrary choice.
Long story: In the 60's, the prevalent programming number systems were decimal and octal — mainframes had 12, 24 or 36 bits per byte, which is nicel...
SQLAlchemy default DateTime
This is my declarative model:
6 Answers
6
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What's the most efficient test of whether a PHP string ends with another string?
...dard PHP way to test whether a string $str ends with a substring $test is:
13 Answers
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