treeWthReduce.cfm

<cfscript>
data = [

    { org: "A0", path: [0,0,0] },

    { org: "A0->B1", path: [0,1,0] },

    { org: "A0->B1->C1", path: [0,1,1] },

    { org: "A0->B1->C2", path: [0,1,2] },

    { org: "A1", path: [1,0,0] },

    { org: "A1->D1", path: [1,1,0] },

    { org: "A1->D1->E1", path: [1,1,1] },

    { org: "A1->D1->E2", path: [1,1,2] },

    { org: "A1->D2", path: [1,2,0] },

    { org: "A1->D2->F1", path: [1,2,1] },

    { org: "A1->D2->F2", path: [1,2,2] }

];

base = {org=""}
stack =[base]

tree = data.reduce((tree, element) => {
    element.children = []
    while (stack.len() > 1 && element.org.reFind("^#stack[1].org#")) {
        stack.shift()
    }
    stack[1].children.append(element)
    stack.prepend(element)
    
    return tree
}, [base])

tree.shift()

writeDump(tree)
</cfscript>