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Are negative array indexes allowed in C?
I was just reading some code and found that the person was using arr[-2] to access the 2nd element before the arr , like so:
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How to make rpm auto install dependencies
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edited Dec 14 '12 at 11:34
answered Dec 14 '12 at 11:24
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What is a plain English explanation of “Big O” notation?
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How to remove item from list in C#?
... use Remove(T item):
var itemToRemove = resultlist.Single(r => r.Id == 2);
resultList.Remove(itemToRemove);
When you are not sure the item really exists you can use SingleOrDefault. SingleOrDefault will return null if there is no item (Single will throw an exception when it can't find the item...
How to get the second column from command output?
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Or use sed & regex.
<some_command> | sed 's/^.* \(".*"$\)/\1/'
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How to store standard error in a variable
...d output.
ERROR=$( { ./useless.sh | sed s/Output/Useless/ > outfile; } 2>&1 )
Note that the semi-colon is needed (in classic shells - Bourne, Korn - for sure; probably in Bash too). The '{}' does I/O redirection over the enclosed commands. As written, it would capture errors from sed ...
Unpacking, extended unpacking and nested extended unpacking
...et's see how it works for a slightly more complex example:
(a,b), c, = [1,2],'this' # a = '1', b = '2', c = 'this'
Applying the above rules, we get
((a, b), c) = ((1, 2), ('t', 'h', 'i', 's'))
But now it's clear from the structure that 'this' won't be unpacked, but assigned directl...
How do I modify fields inside the new PostgreSQL JSON datatype?
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ArithmeticException: “Non-terminating decimal expansion; no exact representable decimal result”
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From the Java 11 BigDecimal docs:
When a MathContext object is supplied with a precision settin...