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Often when moving files around, I need to do the opposite later. So in my .bashrc I included this working code:
rmv() { mv $2/${1##*/} ${1%/*} } Now I wonder why I can't write this as a single liner. This is what I tried:
rmv() {mv $2/${1##*/} ${1%/*}} If I do so, I get this error:
-bash: .bashrc: line 1: syntax error near unexpected token `{mv' 
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Here's the most Pythonic way to write a function in a single line of code: f2 = lambda x: str(x * 3) + '! ' You create a lambda function and assign the new function object to the variable f2 .
It depends on the line of code. If the line of code is just calling another function, then wrapping that in another function doesn't make sense. If it's some complicated line that has lots of parts subject to change, then it might make sense.
Basic Syntax for Defining a Function in Python In Python, you define a function with the def keyword, then write the function identifier (name) followed by parentheses and a colon. The next thing you have to do is make sure you indent with a tab or 4 spaces, and then specify what you want the function to do for you.
There is nothing wrong with one line functions. As mentioned it is possible for the compiler to inline the functions which will remove any performance penalty. Functions should also be preferred over macros as they are easier to debug, modify, read and less likely to have unintended side effects.
In Bash, { is not automatically recognized as a special/separate token from what's around it. So you need whitespace between { and mv.
Additionally:
} needs to be the start of a command; so if it's not on its own line, you need ; to terminate the previous command.So:
rmv() { mv "$2/${1##*/}" "${1%/*}" ; } If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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