RE: [Newbies] problems with scoping

Hi, I face a problem with variable scoping in block-closures:

arr := Array withAll: #(1 2 3 4 5 ). blocks := arr collect: [ :i | [Transcript show: i] ]. blocks do:[:item | item value].

This prints 55555 because blocks contains [Transcript show: i] for all of its elements and accesses the current value of i.

I would like to have blocks contain [Transcript show: 1] [Transcript show: 2] [Transcript show: 3] etc.

so it would print 12345

TIA Christoph

Try this instead.

arr := Array withAll: #(1 2 3 4 5 ). blocks := arr collect: [ :i | [Transcript show: i] fixTemps ]. blocks do:[:item | item value].

Squeak doesn't have true block closures, fixTemps is the standard way around this.

Ramon Leon http://onsmalltalk.com