Tcl: Lsort output differs from bash sort
From FVue
Contents
Problem
Bash sort sorts different compared to tcl lsort. E.g. bash outputs:
$ { echo a-b; echo ab; echo a-; } | sort
a-
ab
a-b
$
Whereas tcl outputs:
% set a {a-b a- ab}
a-b a- ab
% join [lsort $a] "\n"
a-
a-b
ab
%
The difference happens because both environments use a different sorting order:
- bash sort uses the current locale's collating sequence and character set
- tcl lsort uses a C-like sort order where each character is sorted according to its numeric value
Solution 1: Let bash sort like tcl lsort
$ export LC_COLLATE=C
$ { echo a-b; echo ab; echo a-; } | sort
a-
a-b
ab
$ unset LC_COLLATE
$
Solution 2: Let tcl sort like bash sort
% set a {a-b a- ab}
a-b a- ab
% exec sort << [join $a "\n"]
a-
ab
a-b
%
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