Description

Returns the left node of a given node.

The index of the left node of a specified node is calculated as being:

$$ \text{index(left node)} = 2*\text{index(specified node)}+1 $$

Code

This script was tested and works on OpenSim version 0.7.5! 

///////////////////////////////////////////////////////////////////////////
//    Copyright (C) 2013 Wizardry and Steamworks - License: GNU GPLv3    //
///////////////////////////////////////////////////////////////////////////
string wasBinaryTreeLeft(list BT, string node) {
    // Left child index: 2*i + 1
    integer i = llListFindList(BT, (list)node);
    if(i == -1) return "";
    return llList2String(BT, 2*i+1);
}