On 30 Mar 2014, at 1:45 , Roelof Wobben <r.wob...@home.nl> wrote: > Hello, > > When I select this part: > > 1 to: 100 do: > [:i | Transcript show: i asString; cr ]. > > And do print it. > > I only see 1 where I expected to see all the numbers from 1 till 100. > > What went wrong ? > > Roelof > >
"print it" prints the return value of the expression. In the above case, that is the return value of the to:do: method, which is the receiver, so 1 is printed. (If you read the implementation of to:do: on Number, you’ll see there is no explicit return using ^ , in such cases the return is always the receiver) If you wanted to print a list of 1 .. 100 (which would be printed with print it), you’d use a method which returns such a collection for example collect:; (1 to: 100) collect: [:each | each ]. The () are needed, since there is no to:collect: method, so instead we send collect: to an interval, which we create using 1 to: 100. Cheers, Henry
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