Depth first traversal can be accomplished with an array and unshift, breadth-first search via an array and push. Following pseudo-code converts to a flat list: 

# -*- pseudo-mode -*-
traverse_queue = [ root ];
work_queue = [];

while ( work_queue is_not empty ) {
    node = shift( traverse_queue );

    push( work_queue, node ) if BFS;

    push/unshift( traverse_queue, children );

    push( work_queue, node ) if DFS;
}

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--MidLifeXis

In reply to Re: Binary tree without recurssion by MidLifeXis
in thread Binary tree without recurssion by punitpawar

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