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How to convert timestamps to dates in Bash?
I need a shell command or script that converts a Unix timestamp to a date. The input can come either from the first parameter or from stdin, allowing for the following usage patterns:
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Passing arrays as parameters in bash
...ction. Thus no $ is needed when given as parameters.
Note that this still works even with descTable etc being defined with local, because locals are visible to the functions they call.
The ! in ${!1} expands the arg 1 variable.
declare -a just makes the indexed array explicit, it is not strictly nec...
Directory-tree listing in Python
How do I get a list of all files (and directories) in a given directory in Python?
20 Answers
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How do I get elapsed time in milliseconds in Ruby?
...s stated already, you can operate on Time objects as if they were numeric (or floating point) values. These operations result in second resolution which can easily be converted.
For example:
def time_diff_milli(start, finish)
(finish - start) * 1000.0
end
t1 = Time.now
# arbitrary elapsed tim...
How to run a shell script at startup
...two scripts called start_my_app and stop_my_app which start and stop forever (which in turn runs my Node.js application). I use these scripts to manually start and stop my Node.js application. So far so good.
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How to check if a variable exists in a FreeMarker template?
I have a Freemarker template which contains a bunch of placeholders for which values are supplied when the template is processed. I want to conditionally include part of the template if the userName variable is supplied, something like:
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Why hasn't functional programming taken over yet?
...es are also disadvantages.
Stateless programs; No side effects
Real-world programs are all about side effects and mutation. When the user presses a button it's because they want something to happen. When they type in something, they want that state to replace whatever state used to be there. W...
Possible Loss of Fraction
Forgive me if this is a naïve question, however I am at a loss today.
5 Answers
5
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error: default argument given for parameter 1
I'm getting this error message with the code below:
1 Answer
1
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Creating hidden arguments with Python argparse
... to an python argparse.ArgumentParser without it showing up in the usage or help ( script.py --help )?
2 Answers
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