parameter-passing Archives - Page 2 of 3

Why use the params keyword?

I know this is a basic question, but I couldn’t find an answer. Why use it? if you write a function or a ...

May 11, 2022
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Bare asterisk in function arguments?

What does a bare asterisk in the arguments of a function do? When I looked at the pickle module, I see this: pickle.dump(obj, ...

May 9, 2022
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Expanding tuples into arguments

Is there a way to expand a Python tuple into a function – as actual parameters? For example, here expand() does the magic: ...

May 3, 2022
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How do I pass multiple parameters into a function in PowerShell?

If I have a function which accepts more than one string parameter, the first parameter seems to get all the data assigned to ...

May 3, 2022
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How can I pass an argument to a PowerShell script?

There’s a PowerShell script named itunesForward.ps1 that makes iTunes fast forward 30 seconds: $iTunes = New-Object -ComObject iTunes.Application if ($iTunes.playerstate -eq 1) { ...

May 2, 2022
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What does map(&:name) mean in Ruby?

I found this code in a RailsCast: def tag_names @tag_names || tags.map(&:name).join(' ') end What does the (&:name) in map(&:name) mean? 16 s ...

May 2, 2022
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How to write a bash script that takes optional input arguments?

I want my script to be able to take an optional input, e.g. currently my script is #!/bin/bash somecommand foo but I would ...

April 28, 2022
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What does the star and doublestar operator mean in a function call?

What does the * operator mean in Python, such as in code like zip(*x) or f(**k)? How is it handled internally in the ...

April 26, 2022
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How to pass all arguments passed to my bash script to a function of mine? [duplicate]

This question already has answers here: Propagate all arguments in a bash shell script (12 answers) Closed 2 years ago. Let’s say I ...

April 21, 2022
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Check number of arguments passed to a Bash script

I would like my Bash script to print an error message if the required argument count is not met. I tried the following ...

April 18, 2022
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