Tcl question

This topic has 5 replies, 5 voices, and was last updated 3 years, 5 months ago by Charlie Bursell.

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April 8, 2021 at 1:21 pm #118735

David Ma
Participant

I have a tcl that has more message condition checks as following:

if {***} then

{set mykill = TURE}

if {XYZ} then {

set mykill = TURE}

……………..

Is there a way that the first message hits the first IF statement then stop going to check the second or third IF statement and check the second message? It will save some message process time in the engine.
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- April 8, 2021 at 1:26 pm #118736
  
  Boris Perov
  Participant
  
  if {***} {
  set mykill TURE
  } elseif {XYZ} {
  set mykill TURE
  }
- April 8, 2021 at 1:28 pm #118737
  
  Alfred Cox
  Participant
  
  Use an IF- ELSE instead of just IF. Like so:
  
  if {***} {
  
  set mykill = TRUE
  
  } else {
  
  if {XYZ} then {
  
  set mykill = TRUE}
  
  }
- April 8, 2021 at 2:18 pm #118738
  
  Paul Bishop
  Participant
  
  Another option if the same field is being checked in all the conditions is to use the switch command.
  
  switch -exact — $field_to_check {
  “value 1” {action to take}
  “value 2” {action to take}
  …
  default {action to take}
  }
  
  There are two other options besides -exact: -glob and -regexp. The “–” marks the end of the options, and the “default” entry is the action taken if no match is made.
  
  Paul Bishop
  Carle Foundation Hospital
  Urbana, IL
- April 8, 2021 at 2:43 pm #118739
  
  David Ma
  Participant
  
  Thanks all!
  
  I mean if the first IF statement match, then tcl will not check the second ELSE IF statement. the TCL will stop after the first IF statemnet and start checking the second message. something like using if {ABC is ture} then { lappend dispList “KILL $mh”}
- April 9, 2021 at 5:04 am #118740
  
  Charlie Bursell
  Participant
  
  What Boris gave you above is exactly what you ask for. If the first if statement evaluates true then the elseif will not be evaluated. That is the purpose of elseif.
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