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1

So the following works to wrap the for loop and print out something for each item:

iterate() 
 local array=$1

 shift

 for i in $array; do
 $*
 done


iteratecallback() 
 echo item: $i


data=$(ls)
iterate "$data" iteratecallback

But what I would like to do is take the echo item: $i and make i into echo item: $position for top level, then index for next level nesting, then i for third level nesting, for example. Basically, be able to arbitrarily name these index variables while passing them into the wrapping function.

So for example, something like this:

iterate() 
 local customname=$1
 local array=$2

 shift

 for $customname in $array; do
 $*
 done


iteratecallback() 
 echo item: $position

 data2=$(ls)
 iterate index "$data2" iteratecallback2


iteratecallback2() 
 echo item: $index in $position


data=$(ls)
iterate position "$data" iteratecallback

Wondering how to do such a thing in Bash.

bash

share|improve this question

asked Mar 27 at 16:02

Lance PollardLance Pollard

1717

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Note that you're not passing an array, you are passing a string that contains newlines. The for loop iterates over the words in that string, so if you have a filename that contains a space, you're not doing what you think you are.
  
  – glenn jackman
  Mar 27 at 16:23
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You'll want to investigate "nameref" in the bash manual to truly reference a variable in the calling scope.
  
  – glenn jackman
  Mar 27 at 16:24
  

  
  
  
  

add a comment | 

1

So the following works to wrap the for loop and print out something for each item:

iterate() 
 local array=$1

 shift

 for i in $array; do
 $*
 done


iteratecallback() 
 echo item: $i


data=$(ls)
iterate "$data" iteratecallback

But what I would like to do is take the echo item: $i and make i into echo item: $position for top level, then index for next level nesting, then i for third level nesting, for example. Basically, be able to arbitrarily name these index variables while passing them into the wrapping function.

So for example, something like this:

iterate() 
 local customname=$1
 local array=$2

 shift

 for $customname in $array; do
 $*
 done


iteratecallback() 
 echo item: $position

 data2=$(ls)
 iterate index "$data2" iteratecallback2


iteratecallback2() 
 echo item: $index in $position


data=$(ls)
iterate position "$data" iteratecallback

Wondering how to do such a thing in Bash.

bash

share|improve this question

asked Mar 27 at 16:02

Lance PollardLance Pollard

1717

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Note that you're not passing an array, you are passing a string that contains newlines. The for loop iterates over the words in that string, so if you have a filename that contains a space, you're not doing what you think you are.
  
  – glenn jackman
  Mar 27 at 16:23
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  You'll want to investigate "nameref" in the bash manual to truly reference a variable in the calling scope.
  
  – glenn jackman
  Mar 27 at 16:24
  

  
  
  
  

add a comment | 

So the following works to wrap the for loop and print out something for each item:

iterate() 
 local array=$1

 shift

 for i in $array; do
 $*
 done


iteratecallback() 
 echo item: $i


data=$(ls)
iterate "$data" iteratecallback

But what I would like to do is take the echo item: $i and make i into echo item: $position for top level, then index for next level nesting, then i for third level nesting, for example. Basically, be able to arbitrarily name these index variables while passing them into the wrapping function.

So for example, something like this:

iterate() 
 local customname=$1
 local array=$2

 shift

 for $customname in $array; do
 $*
 done


iteratecallback() 
 echo item: $position

 data2=$(ls)
 iterate index "$data2" iteratecallback2


iteratecallback2() 
 echo item: $index in $position


data=$(ls)
iterate position "$data" iteratecallback

Wondering how to do such a thing in Bash.

bash

share|improve this question

asked Mar 27 at 16:02

Lance PollardLance Pollard

1717

iterate() 
 local array=$1

 shift

 for i in $array; do
 $*
 done


iteratecallback() 
 echo item: $i


data=$(ls)
iterate "$data" iteratecallback

iterate() 
 local customname=$1
 local array=$2

 shift

 for $customname in $array; do
 $*
 done


iteratecallback() 
 echo item: $position

 data2=$(ls)
 iterate index "$data2" iteratecallback2


iteratecallback2() 
 echo item: $index in $position


data=$(ls)
iterate position "$data" iteratecallback

share|improve this question

asked Mar 27 at 16:02

Lance PollardLance Pollard

1717

share|improve this question

asked Mar 27 at 16:02

Lance PollardLance Pollard

1717

asked Mar 27 at 16:02

Lance PollardLance Pollard

1717

asked Mar 27 at 16:02

Lance PollardLance Pollard

1717