| | 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== |
projects / BK-2020-03.git / blame_incremental