Differences

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--- string [2019/04/18 23:18] – created korshun
+++ string [2019/04/18 23:48] (current) – [Checking string equality] korshun
@@ Line 11: / Line 11: @@
 ''%%""%%'' is an empty string, i.e. a valid string of length 0. It can be passed to any function and will work as expected.
-===== Comparing strings for equality =====
+===== Checking string equality =====
+<note warning>Do not use ''=='' to check if strings are equal.</note>
+Operator ''=='' only checks if string **numbers** are equal. It may mostly work and then stop working randomly, or when used with a string coming from a different ACS library.
+To check if strings are equal, you need to compare their contents. ACSUtils provides an easy to use function for this, which returns true if two strings are equal:
+''bool StrEquals(str a, str b)''
+Internally, this function calls harder to use [[zdoom>StrCmp]], but it could just as well be implemented using a combination of [[zdoom>StrLen]] and [[zdoom>GetChar]].
+There is also a case-insensitive version:
+''bool StrIEquals(str a, str b)''
+It's implemented using [[zdoom>StrICmp]].
+===== String functions =====
+==== StrIsEmpty ====
+''bool StrIsEmpty(str s)''
+Returns true if the string is an empty string (''%%""%%'').

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