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--- ref_manual:selects [2009/05/05 00:27]
janakj
+++ ref_manual:selects [2012/05/24 21:09]
oej old revision restored
@@ Line 112: / Line 112: @@
 the test is true, when the select returns NON-EMPTY string.
+<note>
+This way of using select is obsolete and it will generate a warning message on start-up.
+For sip-router the if will be true only if it returns a non-empty, non-zero numerical string (e.g. "123").
+The preferred correct ways for sip-router are:
+  if (@select.value!="")
+or
+  if (!strempty(@select.value))
+</note>
   if (@select.value=="string") {...}
   if ("string"==@select.value) {...}
-the result is true, when the select is error-free and its return value.
+the result is true, when the select is error-free and its return value is equal to "string".
-Instead of constant value, you can also use values from $attribute or
+Instead of a constant value, you can use any expression (it could involve avps, pvars or other selects).
-@yet.another.select
   if (@select.value!="string") {...}
@@ Line 136: / Line 149: @@
 obtained as select's return value. This is what you usually don't want.
-You can also use the select as the right hand value of the attribute
+You can also use the select in any kind of expression, be it in the right hand of an assignment, in an if, while() or switch().
-assignment. A new string-type attribute is created and the result value of
-the select function call is assigned to this attribute.
+E.g.:
   $attribute=@the.select.you.want
@@ Line 176: / Line 188: @@
 select, just make sure you have loaded all neccessary modules.
+===== Select List =====
+For a list with all the defined selects in the sip-router devel version (master branch), see
+[[http://sip-router.org/docbook/sip-router/branch/master/select_list/select_list.html]].

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