For loop for array in Pharo Smalltalk

Question

I am trying to create an array with random numbers (total 0 or 1), but when I run it, it just prints this: column of the completed list →

This is my code:

GenList
 | lista |
  lista := Array new: 31.
  1 to: 30 do: [ :i | lista at: i put: 2 atRandom - 1]
  ^lista

What can I do?

Answer 1

Some interesting things:

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1. The method selector does not start with a lowercase letter

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The tradition for selectors begins with a lowercase letter. In this sense, it genListawill be more correct than genLista.

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2. The method selector includes the shortened word 'gen'

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For example, genListayou can rename to genereListao listaAlAzar(if you decide to use Spanish)

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3. Array lista 31 , 30

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Array new: 31 - 31 . 30 , (.. nil). : lista := Array new: 30.

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4. ,

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  1 to: 30 do: [ :i | lista at: i put: 2 atRandom - 1]
  ^lista

, , . , (.. ), ^ (.. ).

, . . ():

1 to: 10 do: [:i | self somethingWith: i]     "<- missing dot here"
self somethingElse

self not understood by block.

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5. 0s 1s

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2 atRandom - 1 . , .

#(0 1) atRandom

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6.

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atRandom , ​​ "". , , -, . . ( , , , , (, ) - .)