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tutorials:faq:main [2020/10/19 21:20]
miconda
tutorials:faq:main [2021/04/03 13:18]
s.safarov_gmail.com
Line 615: Line 615:
 } }
 </code> </code>
 +
 +To compare the return code of a function with a number is recommended to use the value stored in $rc, because the priority of the operators can convert function return code to internal-true or internal-false. Therefore the next approach should be used:
 +
 +<code c>
 +function_returns_four();
 +$var(rc4) = $rc;
 +if($var(rc4)==4) {
 +   # it goes here
 +} else {
 +   # it doesn't go here
 +}
 +...
 +function_returns_two();
 +$var(rc2) = $rc;
 +if($var(rc4)==$var(rc2)) {
 +   # it doesn't go here
 +} else {
 +   # it goes here
 +}
 +...
 +if (function_returns_four() && $rc ieq 6 ) {
 +   # it doesn't go here
 +} else if ($rc ieq 4) {
 +   # it goes here
 +} else {
 +   # it doesn't go here
 +}
 +</code>
 +
 +Note that $rc is overwritten by a new function call, therefore store its value in another variable (like $var(...)) if it is needed for longer time.
  
 For pseudo-variables, the non-zero value is evaluated to true and zero to false, for example: For pseudo-variables, the non-zero value is evaluated to true and zero to false, for example:
tutorials/faq/main.txt ยท Last modified: 2021/08/27 08:11 by miconda