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Top Forums Shell Programming and Scripting Appending the last few columns to the front Post 302212759 by Franklin52 on Tuesday 8th of July 2008 09:11:24 AM
Old 07-08-2008
Quote:
Originally Posted by ragavhere
Thanks. Can you please explain it?

Regards,

Ragav.
Code:
 sed 's/\(.*\)\( - \)\(.*\)/\3\2\1/' file > newfile

With \(.*\) you can select portions of a string. This portion is recalled in the replacement string with \1, \2, \3 etc.

The first portion is the begin of the string until the space before the last minus sign (before " - From").
The second portion are the 3 characters " - " before "From" and the last portion is the rest of the line.
In the replacement string the portion is recalled in the order \3\2\1.

Have a read of a sed tutorial, you can find some links here:

https://www.unix.com/answers-frequent...tutorials.html

Regards
 

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hdf_set_valuef(3)						  util/neo_hdf.h						 hdf_set_valuef(3)

NAME
hdf_set_valuef - Set the value of a named node SYNOPSIS
#include <util/neo_hdf.h> NEOERR* hdf_set_valuef (HDF *hdf, const char *fmt, ...) ATTRIBUTE_PRINTF(2,3); ARGUMENTS
hdf -> the pointer to the hdf dataset fmt -> the name=value printf(3) format string DESCRIPTION
hdf_set_valuef is a convenience function that wraps hdf_set_value. Due to limitations of C, the fmt is in the format "name=value", where we will first format the entire string, and then break it at the first (from the left) equal sign (=) and use the left portion as the name and the right portion as the value. This function is somewhat inefficient in that it first allocates the full name=value, and then the call to hdf_set_value duplicates the value portion, and then we free the name=value. Currently, we don't strip whitespace from the key or value. In the future, this function might work more like reading a single line of an HDF string or file, allowing for attributes and sym- links to be specified... maybe. RETURN VALUE
None SEE ALSO
hdf_set_symlink(3), hdf_get_valuef(3), compareFunc)(3), hdf_dump_str(3), hdf_get_int_value(3), hdf_read_string_ignore(3), hdf_copy(3), hdf_get_node(3), hdf_set_value(3), hdf_obj_child(3), hdf_read_string(3), hdf_set_buf(3), hdf_register_fileload(3), hdf_get_obj(3), hdf_get_attr(3), hdf_obj_top(3), hdf_dump_format(3), hdf_destroy(3), hdf_init(3), hdf_obj_value(3), hdf_write_string(3), hdf_set_val- uevf(3), hdf_sort_obj(3), hdf_write_file_atomic(3), hdf_obj_attr(3), hdf_set_valuef(3), hdf_get_copy(3), hdf_write_file(3), hdf_get_val- uevf(3), hdf_set_int_value(3), hdf_dump(3), hdf_get_value(3), hdf_set_copy(3), hdf_obj_next(3), hdf_search_path(3), hdf_obj_name(3), hdf_set_attr(3), hdf_get_child(3), hdf_remove_tree ClearSilver 12 July 2007 hdf_set_valuef(3)
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