ListFirst |
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Description
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Gets the first element of a list.
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Returns
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The first element of a list. If the list is empty, returns an empty string.
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Category
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List functions
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Function syntax |
ListFirst(list [, delimiters ])
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See also
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ListGetAt, ListLast, ListQualify
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Parameters
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Parameter |
Description |
list |
A list or a variable that contains a list. |
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<h3>ListFirst Example</h3>
<!--- Find a list of users who wrote messages --->
<cfquery name = "GetMessageUser" datasource = "cfsnippets">
SELECT Username, Subject, Posted
FROM Messages
</cfquery>
<cfset temp = ValueList(GetMessageUser.Username)>
<p>Before editing the list, it is:
<cfoutput>#ValueList(GetMessageUser.Username)#</cfoutput>.
<p>(Users who posted more than once are listed more than once.)
<!--- Show the first user in the list --->
<p>The first user in the list is:
<cfoutput>#ListFirst(temp)#</cfoutput>
<p>The rest of the list is: <cfoutput>#ListRest(temp)#</cfoutput>.
<p>(Users who posted more than once are listed more than once.)
<p>The last user in the list is: <cfoutput>#ListLast(temp)#</cfoutput>
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