ListContains |
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Description
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Determines the index of the first list element that contains a specified substring.
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Returns
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Index of the first list element that contains substring. If not found, returns zero.
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Category
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List functions
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Function syntax |
ListContains(list, substring [, delimiters ])
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See also
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ListContainsNoCase, ListFind
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Parameters
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Parameter |
Description |
list |
A list or a variable that contains one. |
substring |
A string or a variable that contains one. The search is case-sensitive. |
delimiters |
A string or a variable that contains one. Character(s) that separate list elements. |
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Default: comma. |
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If this parameter contains more than one character, ColdFusion processes each |
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occurrence of each character as a delimiter. |
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Usage
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ColdFusion ignores empty list elements; thus, the list "a,b,c,,,d" has four elements.
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Example<!--- This example shows differences between ListContains and ListFind --->
<!--- Create a list composed of the elements one, two, three. ---->
<cfset aList = "one">
<cfset aList = ListAppend(aList, "two")>
<cfset aList = ListAppend(aList, "three")>
<p>Here is a list: <cfoutput>#aList#</cfoutput>
<p><strong>ListContains</strong> checks for substring "wo" in the list
elements:
<cfoutput>
<p> Substring "wo" is in
<B>element #ListContains(aList, "wo")#</B> of list.
</cfoutput>
<p>ListFind cannot check for a substring within an element; therefore, in the
code, it does not find substring "wo" (it returns 0):
<cfoutput>
<p> Substring "wo" is in <b>element #ListFind(aList, "wo")#
</b> of the list.</cfoutput>
<p><p>If you specify a string that exactly equals an entire list element, such
as "two", both ListContains and ListFind find it, in the second element:
<p> <strong>ListContains</strong>:
<cfoutput>
The string "two" is in <b>element #ListContains(aList, "two")#</b> of the list.
</cfoutput>
<p><strong>ListFind</strong>:
<cfoutput>
The string "two" is in <b>element #ListFind(aList, "two")#</b> of the list.
</cfoutput>
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