| 1 | #!/bin/bash |
| 2 | |
| 3 | decimate() { |
| 4 | # Desc: Randomly remove 10% of stdin lines |
| 5 | # Depends: Bash 5.1.16; GNU Coreutils 8.32 (shuf, nl, head, sort, cut) |
| 6 | # Version: 0.0.1 |
| 7 | |
| 8 | # Read lines |
| 9 | mapfile -t lines; |
| 10 | |
| 11 | # Calc lines to keep, lk |
| 12 | lc="${#lines[@]}"; |
| 13 | lk="$((lc * 900 / 1000))"; |
| 14 | |
| 15 | # Output |
| 16 | printf "%s\n" "${lines[@]}" | \ |
| 17 | nl -w1 -s' ' | \ |
| 18 | shuf | \ |
| 19 | head -n "$lk" | \ |
| 20 | sort -n -k1,1 | \ |
| 21 | cut -d' ' -f2- ; |
| 22 | }; # randomly eliminate 10% of lines |
| 23 | |
| 24 | echo "$WARNING:This is a Bash function definition." |