User blog comment:Ikosarakt1/Examples for Bird's array notation/@comment-5029411-20131116160218

My Example:

{6,4 [1[3]2] 2} = {6 <0[3]2> 4} = {6 <4<2>4> 4} = {6 <4<1>4[2]4<1>4[2]4<1>4[2]4<1>4> 4}