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Commit	Line	Data
	1	#!/bin/bash
	2
	3	#==BEGIN Function Definitions==
	4	randFloat() {
	5	# Desc: Output random float
	6	# Usage: randFloat arg1
	7	# Inputs: arg1: number of decimal places
	8	# Output: stdout: float as decimal string
	9	# Version: 0.1.1
	10	# Note: Outputs float from 0.000... to 0.999...
	11	# Note: Default number of decimals is 5.
	12	# Ref/Attrib: Integer test regular expression https://stackoverflow.com/a/806923
	13
	14	# Validate input
	15	if [[ $# -eq 0 ]]; then
	16	: # do nothing
	17	elif [[ $# -eq 1 ]]; then
	18	arg1=$1;
	19	RETEST1='^[0-9]+$'
	20	if ! [[ $arg1 =~ $RETEST1 ]]; then
	21	echo "ERROR:Not an integer." >&2; exit 1;
	22	fi;
	23	else
	24	echo "ERROR:Invalid number of arguments:${*}";
	25	fi;
	26
	27	# Produce output
	28	decimals="$(head -c "${arg1:-5}" < <(LC_ALL=C tr -cd "[:digit:]" < <(cat /dev/urandom)))";
	29	printf "0.%s\n" "$decimals";
	30	}; # output random float [0.00000 1.00000] to stdout
	31	#==END Function Definitions==
	32
	33	#==BEGIN sample code==
	34	time randFloat;
	35	dec=5
	36	time randFloat;
	37	dec=70
	38	time randFloat;
	39	time (randFloat && randFloat && randFloat && randFloat && randFloat && randFloat && randFloat && randFloat && randFloat && randFloat);
	40	time (randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec");
	41	time (randFloat "$dec" &>/dev/null && randFloat "$dec" &>/dev/null && randFloat "$dec" &>/dev/null && randFloat "$dec" &>/dev/null && randFloat "$dec" &>/dev/null && randFloat "$dec" &>/dev/null && randFloat "$dec" &>/dev/null && randFloat "$dec" &>/dev/null && randFloat "$dec" &>/dev/null && randFloat "$dec" &>/dev/null);
	42	#==END sample code==