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SQL: How to properly check if a record exists
While reading some SQL Tuning-related documentation, I found this:
9 Answers
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How to format numbers as currency string?
I would like to format a price in JavaScript. I'd like a function which takes a float as an argument and returns a string formatted like this:
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PHP convert date format dd/mm/yyyy => yyyy-mm-dd [duplicate]
I am trying to convert a date from dd/mm/yyyy => yyyy-mm-dd . I have using the mktime() function and other functions but I cannot seem to make it work. I have managed to explode the original date using '/' as the delimiter but I have no success changing the format and swapping the '/' with...
Is Tomcat running?
Interested to know how people usually check to see if Tomcat is running on a Unix environment.
17 Answers
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rsync: how can I configure it to create target directory on server?
...n a separate ssh ... mkdir -p first, or use the --rsync-path trick as explained here :
rsync -a --rsync-path="mkdir -p /tmp/x/y/z/ && rsync" $source user@remote:/tmp/x/y/z/
Or use the --relative option as suggested by Tony. In that case, you only specify the root of the destination, which...
What can I use instead of the arrow operator, `->`?
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The following two expressions are equivalent:
a->b
(*a).b
(subject to operator overloading, as Konrad mentions, but that's unusual).
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How do you copy the contents of an array to a std::vector in C++ without looping?
...from a different part of the program that I need to store for later processing. Since I don't know how many times my function will be called before it is time to process the data, I need a dynamic storage structure, so I chose a std::vector . I don't want to have to do the standard loop to push_...
How do I escape a percentage sign in T-SQL?
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also note you do not have to escape a percent symbol in other constructs such as a user function, concatenation, etc.
– Bron Davies
Nov 30 '12 at 18:49
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Collection that allows only unique items in .NET?
Is there a collection in C# that will not let you add duplicate items to it? For example, with the silly class of
7 Answers...
“unpacking” a tuple to call a matching function pointer
I'm trying to store in a std::tuple a varying number of values, which will later be used as arguments for a call to a function pointer which matches the stored types.
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