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SET versus SELECT when assigning variables?
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edited Jan 5 '16 at 16:30
Luke Girvin
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answered...
Equation (expression) parser with precedence?
...expr = expr `chainl1` toOp
expr = optChainl1 term addop (toScalar 0)
term = factor `chainl1` mulop
factor = sexpr `chainr1` powop
sexpr = parens aexpr
<|> scalar
<|> ident
powop = sym "^" >>= return . (B Pow)
<|> sym "^-" >...
Bash script absolute path with OS X
... [[ $1 = /* ]] && echo "$1" || echo "$PWD/${1#./}"
}
realpath "$0"
This prints the path verbatim if it begins with a /. If not it must be a relative path, so it prepends $PWD to the front. The #./ part strips off ./ from the front of $1.
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What is the difference between Nexus and Maven?
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160
Sonatype Nexus and Apache Maven are two pieces of software that often work together but they do ...
Store query result in a variable using in PL/pgSQL
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201
I think you're looking for SELECT INTO:
select test_table.name into name from test_table where...
Why is parenthesis in print voluntary in Python 2.7?
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107
In Python 2.x print is actually a special statement and not a function*.
This is also why it c...
Is there a simple way to remove unused dependencies from a maven pom.xml?
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answered Oct 4 '09 at 22:59
Pascal ThiventPascal Thivent
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Mod in Java produces negative numbers [duplicate]
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180
The problem here is that in Python the % operator returns the modulus and in Java it returns the...
How can I reverse a list in Python?
...ou can make use of the reversed function for this as:
>>> array=[0,10,20,40]
>>> for i in reversed(array):
... print(i)
Note that reversed(...) does not return a list. You can get a reversed list using list(reversed(array)).
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Timertask or Handler
Let's say that I want to perform some action every 10 seconds and it doesn't necessarily need to update the view.
3 Answer...