need to change variable in this script

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I have script as shown below. Q can be 1, 3 or 6. So like so 1 = E, 3 = R and 6 = S. So, when I get to sending to serial port, Q should be E, R or S. I'm totally stuck. Any help?

touch $logfile

echo "file = $file"

# Split the fields into the Ademco/SIA ContactID fields
MT=`echo $EVENT | cut -b5-6`
ACCT=`echo $EVENT | cut -b1-4`
#MT=`echo $EVENT | cut -b5-6`
Q=`echo $EVENT | cut -b7`
XYZ=`echo $EVENT | cut -b8-10`
GG=`echo $EVENT | cut -b11-12`
CCC=`echo $EVENT | cut -b13-15`
S=`echo $EVENT | cut -b16`

###############################################################################
# Start Logging
################################################################################

echo "================================================================================" >> $logfile
echo "            Alarm Notification received at `date`"  >> $logfile
echo "============================================================================    ====" >> $logfile
echo Alarm String was $EVENT >> $logfile
echo Account Number $ACCT >> $logfile
echo Message Type $MT >> $logfile
echo Event Qualifier $Q >> $logfile
echo Event Code $XYZ >> $logfile
echo Group $GG >> $logfile
echo Zone $CCC >> $logfile
echo Checksum $S >> $logfile
echo "" >> $logfile
echo 5012 $MT$ACCT$Q$XYZ$GG$CCC'\024\r' >> /dev/ttyAMA0
echo 5012 $MT$ACCT$Q$XYZ$GG$CCC >> /home/monitoring/pinCaptur/signals.txt

You can use tr :

Q="123456"
newQ=$(tr "136" "ERS" <<< "${Q}")
echo ${newQ}

E2R45S

Variables in Your Science Fair Project, Most of the time, a JavaScript application needs to work with information. In older scripts, you may also find another keyword: var instead of let : languages, like Scala or Erlang that forbid changing variable values. In such  Yup your right, I fell into the trap when i first started Unity and c# a few months ago "what is the easiest way to manipulate variables from any script with ease" sort of thing and found the above. Knowing what I know now, yeah i'd much rather call scripts via "public MyScript _myscript" and getcomponent etc.

a switch statement is what you want here, it'll allow you to exit in case the input value is wrong.

case $Q in
  1)
    Q=E
    ;;
  3)
    Q=R
    ;;
  6)
    Q=S
    ;;
  *)
    echo "We have an issue here"
    exit 1
esac

Take a look at this You just need to find the object, get the component that you want (your script), and, in this create a method to change the  A shell script allows us to set and use our own variables within the script. Setting variables allows you to temporarily store data and use it throughout the script, making the shell script more like a real computer program. User variables can be any text string of up to 20 letters, digits, or an underscore character.

You can map the numbers 1, 3, 6 to the letters E, R, S using if else statements or an array. Example:

map=([1]=E [3]=R [6]=S)
Q=1
echo "${map[Q]}"     # prints E
Q=3
echo "${map[Q]}"     # prints R
Q=6
echo "${map[Q]}"     # prints S

Also consider using shellcheck.net to improve your script.

I have tried loading all the variables (the struct) to the workspace and change the value of x, but this change only happened in the workspace but not in the function​  Re: Change System variables Default value ('Main' section in script) the default values are setted by your Windows settings, so if there is a French Windows the monthnames are in French. Otherwise you have to Change the Settings in each script (or use an include)

Once a variable has been initialized with a value, you can change (or why you'​d want to do this, from security (if a third party script changed  Keep in mind that variable names are case-sensitive. Within the script, you access variables of both types through the Variables property of the Dts object. Use the Value property to read from and write to individual variables. The Script task transparently manages locking as the script reads and modifies the values of variables.

I have a collection variable defined (Collection > Edit > Variables tab. with my environment, I define and then update variables on pre-scripts  if you want to change the values in script layout then what you need to do is 1.Activate Script Debugger 2.Once Debugging Starts Go to EDIT menu You Have BreakPoint Option, select the row where you need to change the value set the Break point. Now Press F8,it will stop at line where you kept break point.

JavaScript variables are containers for storing data values. In this Try it Yourself ». It's a good programming practice to declare all variables at the beginning of a script. A variable declared without a value will have the value undefined . In order to change variables in your current shell, you can always source your script file (instead of executing it as an independent process), so the script gets executed by your current shell instead of a forked one. If your script is called myscript.sh, call it as source myscript.sh instead of./myscript.sh. answered Jun 9 '16 at 9:27

Comments
  • You could use explicit indices instead of populating dummy elements: map=([1]=E [3]=R [6]=S).
  • @BenjaminW. Thank you for the hint.