zdv2.bktei.com Git - BK-2020-03.git/blame_incremental

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Commit	Line	Data
	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	printf "%s\n" "${lines[@]}" \| \
	16	nl -w1 -s' ' \| \
	17	shuf \| \
	18	head -n "$lk" \| \
	19	sort -n -k1,1 \| \
	20	cut -d' ' -f2- ;
	21	}; # randomly eliminate 10% of lines
	22
	23	echo "$WARNING:This is a Bash function definition."