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How to round an average to 2 decimal places in PostgreSQL?
...ec',1); -- 3.1 float!
SELECT round(2.8+1/3.,'dec'::text); -- need to cast string? pg bug
PS: checking \df round after overloadings, will show something like,
Schema | Name | Result data type | Argument data types
------------+-------+------------------+----------------------------
mysch...
Stack smashing detected
...s protection variables (called canaries) which have known values. An input string of size greater than 10 causes corruption of this variable resulting in SIGABRT to terminate the program.
To get some insight, you can try disabling this protection of gcc using option -fno-stack-protector while co...
Hiding user input on terminal in Linux script
... read's default delimiter is -d $'\n'. The if-statement to break on a nul string, which happens on a newline, is what allows them to finish the password.
– SiegeX
Nov 30 '10 at 18:25
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Allowed characters in filename [closed]
...t correct. Linux doesn't allow /. Windows doesn't allow backslash and some strings (e.g. CON).
– kgadek
Mar 23 '17 at 17:42
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Undefined, unspecified and implementation-defined behavior
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p[5] = 'w';
std::cout << p;
}
The variable p points to the string literal "hello!\n", and the two assignments below try to modify that string literal. What does this program do? According to section 2.14.5 paragraph 11 of the C++ standard, it invokes undefined behavior:
The effect o...
Whitespace Matching Regex - Java
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Yeah, you need to grab the result of matcher.replaceAll():
String result = matcher.replaceAll(" ");
System.out.println(result);
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Is there a splice method for strings?
...he Javascript splice only works with arrays. Is there similar method for strings? Or should I create my own custom function?
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How do I read an entire file into a std::string in C++?
How do I read a file into a std::string , i.e., read the whole file at once?
15 Answers
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How to use GROUP BY to concatenate strings in SQL Server?
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A slightly cleaner way of doing the string manipulation: STUFF((SELECT ', ' + [Name] + ':' + CAST([Value] AS VARCHAR(MAX)) FROM #YourTable WHERE (ID = Results.ID) FOR XML PATH ('')),1,2,'') AS NameValues
– Jonathan Sayce
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UUID max character length
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Section 3 of RFC4122 provides the formal definition of UUID string representations. It's 36 characters (32 hex digits + 4 dashes).
Sounds like you need to figure out where the invalid 60-char IDs are coming from and decide 1) if you want to accept them, and 2) what the max length of...