Character; path to source scripts. Default is "est".
pattern
Character; extensions of R scripts. Default is ".R".
ignore
Character; caracter to be excluded. Default is "~". Sometimes,
the OS creates automatic back-ups, for instance "run.R~", the ideia is to
avoid sourcing these files.
first
Character; first script.
ask
Logical; Check inputs or not. Default is "FALSE". It allows to
stop inputs