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Top Forums UNIX for Advanced & Expert Users Need help to delete special characters exists only at the end of the each record in UNIX file? Post 303029168 by wisecracker on Tuesday 22nd of January 2019 04:29:29 PM
Old 01-22-2019
You have specified pure ASCII characters but not said if your file(s) have had, say for example, utf-8 characters so...
...to expand on everyones' post so far, as 'sed' can be caught out with some UNICODE characters then:
IF you encounter UNICODE characters inside ANY part of your file this might work using Don's simplest version.
Longhand OSX 10.14.1, default bash terminal; BSD sed version unknown.
Note there are 6 UNICODE characters in the test string.
Code:
Last login: Tue Jan 22 21:16:39 on ttys000
AMIGA:amiga~> echo "abc\πœ†/o*&&^%&^?*s123HGFi(*&*Åå*&â" | iconv -c -f utf-8 -t ascii | sed 's/[^[:alnum:]|]*$//'
abc\/o*&&^%&^?*s123HGFi
AMIGA:amiga~> _

 

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UNICODE(1)                                                    General Commands Manual                                                   UNICODE(1)

NAME
unicode - command line unicode database query tool SYNOPSIS
unicode [options] string DESCRIPTION
This manual page documents the unicode command. unicode is a command line unicode database query tool. OPTIONS
-h --help Show help and exit. -x --hexadecimal Assume string to be a hexadecimal number -d --decimal Assume string to be a decimal number -r --regexp Assume string to be a regular expression -s --string Assume string to be a sequence of characters -a --auto Try to guess type of string from one of the above (default) -mMAXCOUNT --max=MAXCOUNT Maximal number of codepoints to display, default: 20; use 0 for unlimited -iCHARSET --io=IOCHARSET I/O character set. For maximal pleasure, run unicode on UTF-8 capable terminal and specify IOCHARSET to be UTF-8. unicode tries to guess this value from your locale, so with properly set up locale, you should not need to specify it. -cADDCHARSET --charset-add=ADDCHARSET Show hexadecimal reprezentation of displayed characters in this additional charset. -CUSE_COLOUR --colour=USE_COLOUR USE_COLOUR is one of on off auto --colour=on will use ANSI colour codes to colourise the output --colour=off won't use colours. --colour=auto will test if standard output is a tty, and use colours only when it is. --color is a synonym of --colour -v --verbose Be more verbose about displayed characters, e.g. display Unihan information, if available. -w --wikipedia Spawn browser pointing to Wikipedia entry about the character. USAGE
unicode tries to guess the type of an argument. For example, you can use any of the following to display information about U+00E1 LATIN SMALL LETTER A WITH ACUTE (a): unicode 00E1 unicode U+00E1 unicode a unicode 'latin small letter a with acute' You can specify a range of characters as argumets, unicode will show these characters in nice tabular format, aligned to 256-byte bound- aries. Use two dots ".." to indicate the range, e.g. unicode 0450..0520 will display the whole cyrillic and hebrew blocks (characters from U+0400 to U+05FF) unicode 0400.. will display just characters from U+0400 up to U+04FF BUGS
Tabular format does not deal well with full-width, combining, control and RTL characters. SEE ALSO
ascii(1) AUTHOR
Radovan Garabik <garabik @ kassiopeia.juls.savba.sk> 2003-01-31 UNICODE(1)
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