Ruby command expansion

ruby-talk
1

Hello,

is there a possibility in ruby to execute a system command by variable?

this code don’t work…

cmd=’/bin/ls’
output=%(cmd)

gp-

2

cmd='/bin/ls'
output=%(cmd)

Try

   output = `#{cmd}`

Guy Decoux

3

Hi,

You can use the ` (backquote), and it is similar as replacing the value of
a variable in a string:

cmd = '/bin/ls'
output = `#{cmd}`
puts output

Regards,

Bill

···

==========================================================================
Gian Paolo Marra gpmarra@le.isiata.le.cnr.it wrote:

Hello,

is there a possibility in ruby to execute a system command by variable?

this code don’t work…

cmd=‘/bin/ls’
output=%(cmd)

gp-

4

Hi Bill!
Thank you!!

Best regards,

gp-

William Djaja Tjokroaminata wrote:

···

Hi,

You can use the ` (backquote), and it is similar as replacing the value of
a variable in a string:

cmd = '/bin/ls'
output = `#{cmd}`
puts output

Regards,

Bill

Gian Paolo Marra gpmarra@le.isiata.le.cnr.it wrote:

Hello,

is there a possibility in ruby to execute a system command by variable?

this code don’t work…

cmd=‘/bin/ls’
output=%(cmd)

gp-