# Structure Functions

There are several functions that help you create and manage structures in ColdFusion applications.

Structure Functions
Function | Description
--- | ---
    IsStruct
| Returns TRUE if the specified variable is a structure.
    StructClear
| Removes all data from the specified structure.
    StructCopy
| Returns a new structure with all the keys and values of the specified structure.
    StructCount
| Returns the number of keys in the specified structure.
    StructDelete
| Removes the specified item from the specified structure.
    StructFind
| Returns the value associated with the specified key in the specified structure.
    StructInsert
| Inserts the specified key-value pair into the specified structure.
    StructIsEmpty
| Indicates whether the specified structure contains data. Returns TRUE if the structure contains no data, and FALSE if it does contain data.
    StructKeyArray
| Returns an array of keys in the specified structure.
    StructKeyExists
| Returns TRUE if the specified key is in the specified structure.
    StructKeyList
| Returns a list of keys in the specified structure.
    StructNew
| Returns a new structure.
    StructUpdate
| Updates the specified key with the specified value.

Note that in all cases, except StructDelete, an exception will be thrown if the referenced key or structure does not exist.

For more information on these functions, see the CFML Language Reference.