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symbol property question

RVERP

I declare 3 variables

a = 10
b= 20
test=list('a 'b)

now I do test->x = 99

now test = (a x 99 b)

 So my list has become 4 items long, containing symbols a,b and x, and a value 99
x is still unbound.

 what has happened when i did test->x = 99??

 

Parents

  • You kind of created a disembodied property list (DPL). It is not a correctly formatted list which should start with a nil and contain symbol/value pairs.

    list( nil 'a "valueForA" 'b 3.2  'x 99 )

    As for x, it is a symbol used as a key in your list. It has no value. In a properly formatted DPL, you would evaluate test->x and have returned the value 99

    I'm not sure what you will get with your malformed DPL.

    Ted

Reply

  • You kind of created a disembodied property list (DPL). It is not a correctly formatted list which should start with a nil and contain symbol/value pairs.

    list( nil 'a "valueForA" 'b 3.2  'x 99 )

    As for x, it is a symbol used as a key in your list. It has no value. In a properly formatted DPL, you would evaluate test->x and have returned the value 99

    I'm not sure what you will get with your malformed DPL.

    Ted

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