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What is the $? (dollar question mark) variable in shell scripting? [duplicate]
...al Parameters" http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_05_02 :
? Expands to the decimal exit status of the most recent pipeline (see Pipelines).
man bash "Special Parameters":
The shell treats several parameters specially. These parameters may only be refe...
Postgresql GROUP_CONCAT equivalent?
...dited Sep 14 '17 at 20:37
Ariel Allon
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answered Apr 1 '10 at 14:55
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Should I use the datetime or timestamp data type in MySQL?
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Timestamps in MySQL are generally used to track changes to records, and are often updated every time the record is changed. If you want to store a specific value you should use a datetime field.
If you meant that you want to decide between using a UNIX ...
Creating a jQuery object from a big HTML-string
...d to the dom. If you take a look at my fiddle (jsfiddle.net/MCSyr/2), I'm calling find on the jQuery object, and it returns a result as expected: $jQueryObject.find("#theAnswer").html()
– kiprainey
Nov 18 '13 at 22:55
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What are paramorphisms?
...foldr c n xs)
para c n [] = n
foldr c n [] = n
Some people call paramorphisms "primitive recursion" by contrast with catamorphisms (foldr) being "iteration".
Where foldr's two parameters are given a recursively computed value for each recursive subobject of the input data (here, that...
Waiting until two async blocks are executed before starting another block
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NSLog(@"Block3");
});
// only for non-ARC projects, handled automatically in ARC-enabled projects.
dispatch_release(group);
and could produce output like this:
2012-08-11 16:10:18.049 Dispatch[11858:1e03] Block1
2012-08-11 16:10:18.052 Dispatch[11858:1d03] Block2
2012-08-11 16:10:23.051 Dis...
Mechanisms for tracking DB schema changes [closed]
...ed code to a production server) but we're still doing database updates manually. I would like to find or create a solution that allows us to work efficiently across servers with different environments while continuing to use Subversion as a backend through which code and DB updates are pushed aroun...
Permanently add a directory to PYTHONPATH?
...n environment variable in your chosen platform and shell, since it's not really a programming question per se.
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Plot correlation matrix into a graph
...answered Mar 28 '11 at 2:37
bill_080bill_080
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Is it possible to preview stash contents in git?
...shows the last tone, 1 the second last one.. etc. git stash list will show all the available.
– brita_
Jul 18 '14 at 21:13
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