lineup(USP)

Name

lineup : Returns the data in the specified field in ascending order

Synopsis

Usage   : lineup [-f] <f1> <f2> ... <file>

Version : Tue Jan  9 09:02:34 JST 2024

Edition : 1

Description

Reads the data in the specified field of <file> and outputs it

as a "lineup" in ascending order.

If <file> is omitted or specified as "-" the command reads from standard input.

Example 1

$ cat data

1 1 717300 abc1

1 2 717301 abc2

1 3 717302 abc3

1 1 717303 abc4

1 2 717304 abc5

2 0 717305 abc6

2 2 717306 abc7

2 2 717307 abc8

3 4 717308 abc9

3 4 717309 abcA

3 4 717310 abcB

$ lineup 2 data

0

1

2

3

4

Example 2

If multiple fields are specified, the specified fields are sorted and output

together as a lineup.

$ lineup 1 2 data

1 1

1 2

1 3

2 0

2 2

3 4

Fields must be specified in ascending order.

$ lineup 1 2 data     OK

$ lineup 2 1 data     Error

Example 3

Specify continuous fields.

$ lineup 1/2 data

1 1

1 2

1 3

2 0

2 2

3 4

Bug

Do not use files whose filename is entirely numeric.

If there exists a file whose filename is "10", then when you

run lineup 1 10 --> it will line up the first field from the

file named "10" instead of lining up fields 1 through 10 from

standard input.

However, if you specify fields with only one digit (i.e. "2"), then

even if there is a file named "2" it will be ignored and "2" will

be considered the field designator.