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Top Forums Shell Programming and Scripting concatenate 'n' number of columns in a file Post 302460416 by mlpathir on Wednesday 6th of October 2010 06:44:08 PM
Old 10-06-2010
concatenate 'n' number of columns in a file

i have a file which may have 'n' number of columns

1 222 fafda 32 afdaf 4343 4343
234 43fdaf 4343 fdd fdfd fdfd fdd fdfd fdfd
fdfd fdfd fdfd fdd fdfd fdfd

need to concatenate the columns with space separator using shell script

output should look like

1 222 fafda 32 afdaf 4343 4343
234 43fdaf 4343 fdd fdfd fdfd fdd fdfd fdfd
fdfd fdfd fdfd fdd fdfd fdfd

Last edited by mlpathir; 10-06-2010 at 08:36 PM..
 

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Tcl_Concat(3)						      Tcl Library Procedures						     Tcl_Concat(3)

__________________________________________________________________________________________________________________________________________________

NAME
Tcl_Concat - concatenate a collection of strings SYNOPSIS
#include <tcl.h> const char * Tcl_Concat(argc, argv) ARGUMENTS
int argc (in) Number of strings. const char *const argv[] (in) Array of strings to concatenate. Must have argc entries. _________________________________________________________________ DESCRIPTION
Tcl_Concat is a utility procedure used by several of the Tcl commands. Given a collection of strings, it concatenates them together into a single string, with the original strings separated by spaces. This procedure behaves differently than Tcl_Merge, in that the arguments are simply concatenated: no effort is made to ensure proper list structure. However, in most common usage the arguments will all be proper lists themselves; if this is true, then the result will also have proper list structure. Tcl_Concat eliminates leading and trailing white space as it copies strings from argv to the result. If an element of argv consists of nothing but white space, then that string is ignored entirely. This white-space removal was added to make the output of the concat command cleaner-looking. The result string is dynamically allocated using Tcl_Alloc; the caller must eventually release the space by calling Tcl_Free. SEE ALSO
Tcl_ConcatObj KEYWORDS
concatenate, strings Tcl 7.5 Tcl_Concat(3)
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