Groovy question

[Paweł Gdula-2]

Why result of 1 is different from 2 if both are equal in 3 (for grail 1.1.1 and groovy 1.6.5)

def foo = 1

(1) assert ['1','2','3'].contains("${foo}") == false

(2) assert ['1','2','3'].contains(foo.toString()) == true

(3) assert "${foo}" == foo.toString()

[Paweł Gdula-2]

Ok, i found:

"${foo}".class => org.codehaus.groovy.runtime.GStringImpl

foo.toString().class => java.lang.String

2009/12/16 Paweł Gdula <[hidden email]>

Why result of 1 is different from 2 if both are equal in 3 (for grail 1.1.1 and groovy 1.6.5)

def foo = 1

(1) assert ['1','2','3'].contains("${foo}") == false

(2) assert ['1','2','3'].contains(foo.toString()) == true

(3) assert "${foo}" == foo.toString()

[Robert Fischer]

This is a rampaging annoyance in Groovy, and it has to do with Java's definition of "equals" in the
String class and Java code's method dispatch not going through Groovy's MOP.

~~ Robert.

Paweł Gdula wrote:

> Ok, i found:
>
> "${foo}".class => org.codehaus.groovy.runtime.GStringImpl
> foo.toString().class => java.lang.String
>
> 2009/12/16 Paweł Gdula <[hidden email]
> <mailto:[hidden email]>>
>
>     Why result of 1 is different from 2 if both are equal in 3 (for
>     grail 1.1.1 and groovy 1.6.5)
>
>     def foo = 1
>     (1) assert ['1','2','3'].contains("${foo}") == false
>     (2) assert ['1','2','3'].contains(foo.toString()) == true
>     (3) assert "${foo}" == foo.toString()
>
>

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