Gnu/coreutils/Tilde- 007e-character
Next: Version sort ignores locale, Previous: Punctuation Characters vs letters, Up: Implementation Details [Contents][Index]
30.2.5 Tilde ‘~
’ character
Rule 2.2.2 dictates that tilde character ‘~
’ (ASCII 126) sorts
before all other non-digit characters, including an empty part.
$ cat input7 1 1% 1.2 1~ ~ $ sort -V input7 ~ 1~ 1 1% 1.2
The sorting algorithm starts by breaking down the string into non-digits (rule 2) and digits parts (rule 3).
In the above input file, only the last line in the input file starts
with a non-digit (‘~
’). This is the first part. All other lines
in the input file start with a digit - their first non-digit part is
empty.
Based on rule 2.2.2, tilde ‘~
’ sorts before all other non-digits
including the empty part - hence it comes before all other strings,
and is listed first in the sorted output.
The remaining lines (1
, 1%
, 1.2
, 1~
)
follow similar logic: The digit part is extracted (1 for all strings)
and compares identical. The following extracted parts for the remaining
input lines are: empty part, %
, .
, ~
.
Tilde sorts before all others, hence the line 1~
appears next.
The remaining lines (1
, 1%
, 1.2
) are sorted based
on previously explained rules.