Revision Difference
table.HasValue#526524
<function name="HasValue" parent="table" type="libraryfunc">
<description>
Checks if a table has a value.
<warning>This function is **very inefficient for large tables** (O(n)) and should probably not be called in things that run each frame. Instead, consider a table structure such as example 2 below.</warning>
<note>For optimization, functions that look for a value by sorting the table should never be needed if you work on a table that you built yourself.</note>
</description>
<realm>Shared and Menu</realm>
<file line="89-L98">lua/includes/extensions/table.lua</file>
<file line="101-L106">lua/includes/extensions/table.lua</file>
<args>
<arg name="tbl" type="table">Table to check</arg>
<arg name="value" type="any">Value to search for</arg>
</args>
<rets>
<ret name="" type="boolean">Returns true if the table has that value, false otherwise</ret>
</rets>
</function>
<example>
<description>Creates a table with values "123" and "test" and checks to see it the table holds value "apple"</description>
<code>
local mytable = {"123", "test"}
print(table.HasValue(mytable, "apple"), table.HasValue(mytable, "test"))
</code>
<output>false true</output>
</example>
<example>
<description>Example usage of O(1) associative array structure</description>
<code>
local mytable = { ["123"] = true, test = true }
print(mytable["apple"], mytable["test"])
</code>
<output>nil true</output>
</example>