
========================
Expression: true()
Object is a Boolean : true

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Expression: false()
Object is a Boolean : false

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Expression: number("1.5")
Object is a number : 1.5

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Expression: concat("titi",'toto')
Object is a string : tititoto

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Expression: concat("titi",'toto',"tata","last")
Object is a string : tititototatalast
