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How to make an element in XML schema optional?
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191
Try this
<xs:element name="description" type="xs:string" minOccurs="0" maxOccurs="1" />...
Java 8: Where is TriFunction (and kin) in java.util.function? Or what is the alternative?
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can't just leave an argument open. You can't just say "well, let x := 1" and try out
every y you may like to try. You have to construct every time the whole tuple with
x := 1. So if you like to see what the functions return for y := 1, y := 2, y := 3 you
have to write f(1,1) , f(1,2) , f(1,3)....
How to concatenate strings of a string field in a PostgreSQL 'group by' query?
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14 Answers
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How do you test that a Python function throws an exception?
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13 Answers
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Is it correct to use JavaScript Array.sort() method for shuffling?
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12 Answers
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How much size “Null” value takes in SQL Server
I have a large table with say 10 columns. 4 of them remains null most of the times. I have a query that does null value takes any size or no size in bytes. I read few articles some of them are saying :
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Append TimeStamp to a File Name
...following custom format specifiers y (year), M (month), d
(day), h (hour 12), H (hour 24), m (minute), s (second), f (second
fraction), F (second fraction, trailing zeroes are trimmed), t (P.M or
A.M) and z (time zone).
With Extension Method
Usage:
string result = "myfile.txt".AppendTimeS...
MySQL join with where clause
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291
You need to put it in the join clause, not the where:
SELECT *
FROM categories
LEFT JOIN user_c...
PostgreSQL function for last inserted ID
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10 Answers
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