在命令行上使用sort
时,为什么排序顺序取决于我使用的字段分隔符?举个例子,
$ # The test file:
$ cat test.csv
2,az,a,2
3,a,az,3
1,az,az,1
4,a,a,4
$ # sort based on fields 2 and 3, comma separated. Gives correct order.
$ LC_ALL=C sort -t, -k2,3 test.csv
4,a,a,4
3,a,az,3
2,az,a,2
1,az,az,1
$ # replace , by ~ as field separator, then sort as before. Gives incorrect order.
$ tr "," "~" < test.csv | LC_ALL=C sort -t"~" -k2,3
2~az~a~2
1~az~az~1
4~a~a~4
3~a~az~3
第二种情况不仅排序错误,而且在字段 2(其中az
< a
)和字段 3(其中a
< az
)之间不一致。