Hey!
How do i check if a file exists, that starts with a certain identifier?
e.g. Files in Directory
file_1.rb
file_2.rb
test_1.rb
I only want to know if a file exists, that starts with "file_"
thx
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Posted via http://www.ruby-forum.com/.
Christian Kerth wrote:
I only want to know if a file exists, that starts with "file_"
Dir.entries('.').detect {|f| f.match /^file_/}
Replace '.' with the name of the directory to check if it is not the
current directory. Will return the name of the first file to match if
there is one, else will return nil.
···
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Posted via http://www.ruby-forum.com/\.
[mailto:list-bounce@example.com] On Behalf Of Christian Kerth
# How do i check if a file exists, that starts with a certain
# identifier?
# e.g. Files in Directory
# file_1.rb
# file_2.rb
# test_1.rb
# I only want to know if a file exists, that starts with "file_"
there are many ways.
these are just some...
Dir.glob("file_*.rb").empty?
#=> false
Dir.glob("file_*.rb").size>0
#=> true
Dir.glob("file_*.rb")
#=> ["file_1.rb", "file_2.rb", "file_3.rb"]
File.exist? "file_1.rb"
#=> true
File.exist? "file_2.rb"
#=> true
File.exist? "file_4.rb"
#=> false
kind regards -botp