projects / BK-2020-03.git / blame
| Commit | Line | Data |
|---|---|---|
| 891bb4bd SBS |
1 | #!/bin/bash |
| 2 | ||
| 3 | #==BEGIN Function Definitions== | |
| 4 | randFloat() { | |
| 5 | # Desc: Output random float with no newline | |
| 6 | # Usage: randFloat arg1 | |
| 7 | # Inputs: arg1: number of decimal places | |
| 8 | # Output: stdout: float as decimal string | |
| 9 | # Version: 0.0.1 | |
| 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 ${arg1:-5} < <(LC_ALL=C tr -cd "[:digit:]" < <(cat /dev/urandom)))"; | |
| 29 | echo 0."$decimals"; | |
| 30 | } | |
| 31 | #==END Function Definitions== | |
| 32 | ||
| 33 | #==BEGIN sample code== | |
| 34 | dec=70 | |
| 35 | time randFloat; | |
| 36 | time (randFloat && randFloat && randFloat && randFloat && randFloat && randFloat && randFloat && randFloat && randFloat && randFloat); | |
| 37 | time (randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec" && randFloat "$dec"); | |
| 38 | 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); | |
| 39 | #==END sample code== |