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Full Discussion: Optimizing bash script
Top Forums Shell Programming and Scripting Optimizing bash script Post 302975517 by stomp on Tuesday 14th of June 2016 04:31:07 PM
Old 06-14-2016
Hi,

can you post sample input + output files? That will
make it easier.

stomp();

Here's some bash code, which should be a lot faster, because only shell builtins are used. Can be better if you bring samples(in/out) and explain them.

Code:
#!/bin/bash

shopt -s nocasematch 

NUMBER=${TMFR//[wdhmoWDHMO]/}

# default multiplier for MINUTES
MULTIPLIER=60

# order of the checks matters!
[[ "$TMFR" =~ mo ]] && MULTIPLIER=2592000 # MONTH
[[ "$TMFR" =~ w  ]] && MULTIPLIER=604800  # WEEK
[[ "$TMFR" =~ d  ]] && MULTIPLIER=86400   # DAY
[[ "$TMFR" =~ h  ]] && MULTIPLIER=3600    # HOUR

((FIRSTIN= $NUMBER * $MULTIPLIER))

echo $FIRSTIN $NUMBER $MULTIPLIER


Last edited by stomp; 06-14-2016 at 06:38 PM..
This User Gave Thanks to stomp For This Post:
 

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QRENCODE(1)						      General Commands Manual						       QRENCODE(1)

NAME
qrencode - Encode input data in a QR Code and save as a PNG or EPS image. SYNOPSIS
qrencode [OPTION]... [STRING] DESCRIPTION
Libqrencode is a library for encoding data in a QR Code symbol, a kind of 2D symbology that can be scanned by handy terminals such as a mobile phone with CCD. The capacity of QR Code is up to 7000 digits or 4000 characters, and has high robustness. Qrencode is a utility software using libqrencode to encode string data in a QR Code and save as a PNG or EPS image. OPTIONS
-h, --help display help message. -o FILENAME, --output=FILENAME write image to FILENAME. If '-' is specified, the result will be output to standard output. If -S is given, structured symbols are written to FILENAME-01.png, FILENAME-02.png, ... (suffix is removed from FILENAME, if specified) -s NUMBER, --size=NUMBER specify the size of dot (pixel). (default=3) -l {LMQH}, --level={LMQH} specify error collectin level from L (lowest) to H (highest). (default=L) -v NUMBER, --symversion=NUMBER specify the version of the symbol. (default=auto) -m NUMBER, --margin=NUMBER specify the width of margin. (default=4) -d NUMBER, --dpi=NUMBER specify the DPI of the generated PNG. (default=72) -t {PNG,EPS,ANSI,ANSI256}, --type={PNG,EPS,ANSI,ANSI256} specify the type of the generated image. (default=PNG) -S, --structured make structured symbols. Version must be specified. -k, --kanji assume that the input text contains kanji (shift-jis). -c, --casesensitive encode lower-case alphabet characters in 8-bit mode. (default) -i, --ignorecase ignore case distinctions and use only upper-case characters. -8, --8bit encode entire data in 8-bit mode. -k, -c and -i will be ignored. -M, --micro encode in a Micro QR Code. (experimental) -V, --version display the version number and copyrights of the qrencode. [STRING] input data. If it is not specified, data will be taken from standard input. EXAMPLES
qrencode -l L -v 1 -o output.png 'Hello, world!' encode into a symbol version 1, level L. qrencode -iSv 1 --output=output.png read standard input and encode it into a structured-appended symbols in case-insensitive mode. AUTHOR
Written by Kentaro Fukuchi. RESOURCES
Main Web Site: http://fukuchi.org/works/qrencode/ Source code repository: https://github.com/fukuchi/libqrencode/ COPYRIGHT
Copyright (C) 2006-2012 Kentaro Fukuchi. qrencode 3.3.0 Feb. 29, 2012 QRENCODE(1)
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