go run uniq.go [-c | -d | -u] [-i] [-f num] [-s chars] [input_file [output_file]]
-c - count the number of occurrences of the string in the input.
Output this number before the string separated by a space.
-d - output only those lines that are repeated in the input.
-u - output only those lines that are not repeated in the input.
-f num_fields Ignore the first num_fields fields in a line.
A field in a string is a non-empty set of characters separated by a space.
-s num_chars ignore the first num_chars characters in the string.
When used with the -f option, first characters are counted
after num_fields fields (ignoring space delimiter after
last field).
-i - do not take into account the case of letters.
uniq [-c | -d | -u] [-i] [-f num] [-s chars] [input_file [output_file]]
-
All parameters are optional. Utility behaviors without parameters -- simple derivation of unique strings from the input.
-
Parameters
c, d, uare interchangeable. Should be considered, that in parallel these parameters do not make any sense. At passing one along with the other needs to be displayed to the user proper use of the utility -
If
input_fileis not passed, then considerstdinas the input stream -
If
output_fileis not passed, then considerstdoutas the output stream
Without parameters
$cat input.txt
I love music.
I love music.
I love music.
I love music of Kartik.
I love music of Kartik.
Thanks.
$cat input.txt | go run uniq.go
I love music.
I love music of Kartik.
Thanks.With "input_file" parameter
$cat input.txt
I love music.
I love music.
I love music.
I love music of Kartik.
I love music of Kartik.
Thanks.
$go run uniq.go input.txt
I love music.
I love music of Kartik.
Thanks.With "input_file" and "output_file" parameters
$cat input.txt
I love music.
I love music.
I love music.
I love music of Kartik.
I love music of Kartik.
Thanks.
$go run uniq.go input.txt output.txt
$cat output.txt
I love music.
I love music of Kartik.
Thanks.With "-c" parameter
$cat input.txt
I love music.
I love music.
I love music.
I love music of Kartik.
I love music of Kartik.
Thanks.
$cat input.txt | go run uniq.go -c
3 I love music.
1
2 I love music of Kartik.
1 Thanks.With "-d" parameter
$cat input.txt
I love music.
I love music.
I love music.
I love music of Kartik.
I love music of Kartik.
Thanks.
$cat input.txt | go run uniq.go -d
I love music.
I love music of Kartik.With "-u" parameter
$cat input.txt
I love music.
I love music.
I love music.
I love music of Kartik.
I love music of Kartik.
Thanks.
$cat input.txt | go run uniq.go -d
Thanks.With "-i" parameter
$cat input.txt
I LOVE MUSIC.
I love music.
I LoVe MuSiC.
I love MuSIC of Kartik.
I love music of kartik.
Thanks.
$cat input.txt | go run uniq.go -i
I LOVE MUSIC.
I love MuSIC of Kartik.
Thanks.With "-f num" parameter
$cat input.txt
We love music.
I love music.
They love music.
I love music of Kartik.
We love music of Kartik.
Thanks.
$cat input.txt | go run uniq.go -f 1
We love music.
I love music of Kartik.
Thanks.With "-s num" parameter
$cat input.txt
I love music.
A love music.
C love music.
I love music of Kartik.
We love music of Kartik.
Thanks.
$cat input.txt | go run uniq.go -s 1
I love music.
I love music of Kartik.
We love music of Kartik.
Thanks.