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Comparing two Objects

06.20.2011
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I recently wanted to compare two objects to see if they were the same. After looking through the cfml ref I couldn't find anything, but I did find that you can use ArrayFind to do it.

Here's a quick test I wrote:

Foo.cfc

component 
{ 
  this.uuid = CreateUUID(); 
}

test.cfm

<cfset foo = new foo()>
<cfset bar = new foo()>
<cfoutput>

is foo equal to foo? #ArrayFind( [foo], foo ) gt 0#<br />
is foo equal to bar? #ArrayFind( [foo], bar ) gt 0#<br />
</cfoutput>

The output when I run this script is:

is foo equal to foo? YES

is foo equal to bar? NO

It also works with persistent entities, this is a test I wrote using the cfcodeexplorer datasource:

<cfset NewArtist = EntityNew( "Artist" )>
<cfset Artist = EntityLoadByPK( "Artist", 1 )>
<cfset Artist2 = EntityLoadByPK( "Artist", 1 )>

<cfset foo = new foo()>

<cfoutput>
is Artist equal to Artist? #ArrayFind( [Artist], Artist ) gt 0#<br />
is NewArtist equal to Artist? #ArrayFind( [NewArtist], Artist ) gt 0#<br />
is Artist equal to Artist2? #ArrayFind( [Artist], Artist2 ) gt 0#<br />
is foo equal to Artist? #ArrayFind( [foo], Artist ) gt 0#
</cfoutput>

The output when I run this script is:

is Artist equal to Artist? YES
is NewArtist equal to Artist? NO
is Artist equal to Artist2? YES
is foo equal to Artist? NO

References
Published at DZone with permission of John Whish, author and DZone MVB. (source)

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Comments

Sirikant Noori replied on Sun, 2012/01/15 - 1:08pm

be careful. ArrayFind will only compare the property with fieldtype="id" when component persistent=true.

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