[MAKR] 2009-04-09 a ''list zipper''. This was briefly discussed on the chat today by [RS], [kruzalex], and [teo]. The implementation could be like:

    proc lzip {l1 l2} {
        set res {}
        foreach x $l1 y $l2 {
            lappend res $x $y
        } 
        set res
    }

would lead to

    $ lzip {a b c} {1 2 3}
    a 1 b 2 c 3

A more generic form is available as [[[interleave]]].

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