newbie programming question:

[DiesIrae]

Hello,

I am trying to pass a variable to the backticks `` function, but it is
always interpreted as a string. How can I get it to read the value,
instead? And once I do that, how can I get the results into an array?
Here's the example code (this probably looks horribly wrong to some
of you...):


def ping_host host
command=Array.new
command[0]=`ping host`
puts
puts command
end

puts 'What host would you like to ping?'
host = gets.chomp
ping_host host

thanks for any help!

Dan

 

[Hal Fulton]

Hello,

I am trying to pass a variable to the backticks `` function, but it is
always interpreted as a string. How can I get it to read the value,
instead? And once I do that, how can I get the results into an array?
Here's the example code (this probably looks horribly wrong to some
of you...):

command[0]=`ping host`

Do this instead:

command[0]=`ping #{host}`

The #{} syntax can be used to interpose not just a variable,
but any arbitrary expression.

Solvet saeclum in favilla...


Hal

 

[Shashank Date]

I am trying to pass a variable to the backticks `` function, but it is
always interpreted as a string. How can I get it to read the value,
instead? And once I do that, how can I get the results into an array?
Here's the example code (this probably looks horribly wrong to some
of you...):


def ping_host host
command=Array.new
command[0]=`ping host`

^^^^^^^^
try this:

command[0] = `ping #{host}`

 

[Cristi BALAN]

Hello,

I am trying to pass a variable to the backticks `` function, but it is
always interpreted as a string. How can I get it to read the value,
instead? And once I do that, how can I get the results into an array?
Here's the example code (this probably looks horribly wrong to some
of you...):

def ping_host host
command=Array.new

command[0]=`ping host`

this line should be
command[0]=`ping #{host}`

 

[Stephan Kämper]

Hi,

I am trying to pass a variable to the backticks `` function, but it is
always interpreted as a string. How can I get it to read the value,
instead? And once I do that, how can I get the results into an array?
Here's the example code (this probably looks horribly wrong to some
of you...):


def ping_host host
command=Array.new
command[0]=`ping host`

command[0]=`ping #{host}`

puts
puts command
end

puts 'What host would you like to ping?'
host = gets.chomp
ping_host host

Note the #{...} notation in the backticks above.

Happy rubying

Stephan

 

[David A. Black]

Hi --

Hello,

I am trying to pass a variable to the backticks `` function, but it is
always interpreted as a string. How can I get it to read the value,
instead? And once I do that, how can I get the results into an array?
Here's the example code (this probably looks horribly wrong to some
of you...):


def ping_host host
command=Array.new
command[0]=`ping host`
puts
puts command
end

puts 'What host would you like to ping?'
host = gets.chomp
ping_host host

You can interpolate your variable using the #{...} construct, and
if you want the results in an array, one line per element, you
can use #to_a:

def ping_host(host)
puts
puts `ping -c2 #{host}`.to_a # 2 pings only
end

puts 'What host would you like to ping?'
ping_host(gets.chomp)


David