Make unique array of structure

Question

Hi all.
How can make array of unique elements ?
Heed to get from array -> array1
<cfset array = arrayNew(1) />
<cfset array1 = arrayNew(1) />
<cfset array[ 1 ] = { id = '1' } />
<cfset array[ 2 ] = { id = '1' } />
<cfset array[ 3 ] = { id = '1' } />
<cfset array[ 4 ] = { id = '2' } />
<cfset array[ 5 ] = { id = '3' } />
<cfset array[ 6 ] = { id = '4' } />
<cfset array[ 7 ] = { id = '4' } />
<cfset array[ 8 ] = { id = '5' } />
<cfdump var="#array#" label="Current" />
<cfset array1[ 1 ] = { id = '1' } />
<cfset array1[ 2 ] = { id = '2' } />
<cfset array1[ 3 ] = { id = '3' } />
<cfset array1[ 4 ] = { id = '4' } />
<cfset array1[ 5 ] = { id = '5' } />
<br /><br />
<cfdump var="#array1#" label="Needfull" />

Answer 1

There are a few 'tricks' that you can use here ...
A "struct" is fundamentally an associative-array structure.  So, if you've got an "id" field of any sort, a struct can locate any "id" almost instantly.  This is much faster than searching an array (which has a hidden cost created by virtual-memory paging over a large "footprint").
When you add a struct to another struct or to an array, you are actually moving a reference to the structure.  You should find that (afaik!), if the struct is present both in an array and in a struct, both of these are references to one-and-the-same memory block.
Use the most-convenient data structure when building the original set of records.  This is probably going to be a "struct."  If you then need to have an array of elements sorted in a particular way, build that array last, by using a "sort" operation to arrange the records in whatever order you want.  Since you'are actually (afaik...) moving references, you're not stomping on too much RAM.
"Sorting" is what I call an "unexpectedly fast and efficient" operation, because it's one of the most heavily-studied operations in all of data processing ... and has been since the days of Herman Hollerith.