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Top Forums UNIX for Dummies Questions & Answers BASH Shell Scripting: If, Then Statement Post 302796057 by hanson44 on Thursday 18th of April 2013 09:54:30 PM
Old 04-18-2013
You are right that "if, then" is normally better. I used the case because it works well for matching a pattern, such as you are trying to match "*.c" pattern. There are other ways to do the pattern match. Here is one that seems pretty simple:
Code:
$ cat test.sh
#!/bin/bash

echo -n "Enter file name: "
read file
echo $file | grep -q "\.c$"
if [ $? -eq 0 ]; then
  echo $file
else
  exit
fi

---------------------
Code:
sed '/*/,/\//d'

I'm sorry, this will not do as intended, will not just delete comments. One thing to remember is that sed d command deletes entire lines, and /A/,/B/ indicates a range of lines to delete.
Code:
$ cat test.c
int x = 5; /* comment 1 */
int y = 3; /* comment 2 */
int z = 8; /* comment 3 */

Code:
$ sed '/*/,/\//d' test.c
(no output - everything deleted)

 

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Prophet::Test(3pm)					User Contributed Perl Documentation					Prophet::Test(3pm)

   set_editor($code)
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   in_gladiator($code)
       Run the given code using Devel::Gladiator.

   repo_path_for($username)
       Returns a path on disk for where $username's replica is stored.

   repo_uri_for($username)
       Returns a file:// URI for $USERNAME'S replica (with the correct replica type prefix).

   replica_uuid
       Returns the UUID of the test replica.

   database_uuid
       Returns the UUID of the test database.

   replica_last_rev
       Returns the sequence number of the last change in the test replica.

   as_user($username, $coderef)
       Run this code block as $username.  This routine sets up the %ENV hash so that when we go looking for a repository, we get the user's repo.

   replica_uuid_for($username)
       Returns the UUID of the given user's test replica.

   database_uuid_for($username)
       Returns the UUID of the given user's test database.

   ok_added_revisions( { CODE }, $numbers_of_new_revisions, $msg)
       Checks that the given code block adds the given number of changes to the test replica. $msg is optional and will be printed with the test
       if given.

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       Returns a simple, serialized version of a Prophet::Conflict object suitable for comparison in tests.

       The serialized version is a hash reference containing the following keys:
	   meta => { original_source_uuid => 'source_replica_uuid' }
	   records => { 'record_uuid' =>
			  { change_type => 'type',
			    props => { propchange_name => { source_old => 'old_val',
							    source_new => 'new_val',
							    target_old => 'target_val',
							  }
				     }
			  },
			'another_record_uuid' =>
			  { change_type => 'type',
			    props => { propchange_name => { source_old => 'old_val',
							    source_new => 'new_val',
							    target_old => 'target_val',
							  }
				     }
			  },
		      }

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       Returns a simple, serialized version of a Prophet::ChangeSet object suitable for comparison in tests (a hash).

   run_command($command, @args)
       Run the given command with (optionally) the given args using a new Prophet::CLI object. Returns the standard output of that command in
       scalar form or, in array context, the STDOUT in scalar form *and* the STDERR in scalar form.

       Examples:

	   run_command('create', '--type=Foo');

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       Loads and returns a record object for the record with the given type and uuid.

   as_alice CODE, as_bob CODE, as_charlie CODE, as_david CODE
       Runs CODE as alice, bob, charlie or david.

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