On js Recursive method - Codes Helper - Programming Question Answer

On js Recursive method

topic description

there are 2 arrays

related codes

var a = ["customer","supplier","materal","purchaseOrder","rolesMenge"]
var b = [
    {
        name:"maindata",
        children:[
            {
                name:"customer",
                meta:{
                    title:"customer"    
                }
            },
            {
                name:"supplier",
                meta:{
                    title:"supplier"    
                }
            },
            {
                name:"materal",
                meta:{
                    title:"materal"    
                }
            },
        ]
    },
    {
        name:"purchase",
        children:[
            {
                name:"purchaseOrder",
                meta:{
                    title:"purchaseOrder"    
                }
            },
            {
                name:"purchaseGood",
                meta:{
                    title:"purchaseGood"    
                }
            },
        ]
    },
    {
        name:"stock",
        children:[
            {
                name:"stockOrder",
                meta:{
                    title:"stockOrder"    
                }
            }
        ]
    },
    {
        name:"config",
        children:[
            {
                name:"userConfig",
                children:[
                    {
                        name:"rolesMenge",
                        meta:{
                            title:"rolesMenge"    
                        }
                    }
                ]
            },
        ]
    }
]

my code

function getarr(a,b){
    return b.reduce((k,m) => {
        if(m.children){
            let obj = {
                name:m.name,
                children:[]
            }
            for(let j of m.children){
                if(j.children){
                    getarr(a,m.children)
                } else {
                    if(a.includes(j.meta.title)){
                        obj.children.push(j)
                    }
                }
                
            }
            if(obj.children.length){
                k.push(obj)
            }

        }
        return k
    },[])
}

what result do you expect? What is the error message actually seen?

want to get

[
    {
        name: "maindata",
        children:[
            {
                name:"customer",
                meta:{
                    title:"customer"    
                }
            },
            {
                name:"supplier",
                meta:{
                    title:"supplier"    
                }
            },
            {
                name:"materal",
                meta:{
                    title:"materal"    
                }
            }
         ]
     }, 
     {
        name:"purchase",
        children:[
            {
                name:"purchaseOrder",
                meta:{
                    title:"purchaseOrder"    
                }
            }
        ]
    },
    {
        name:"config",
        children:[
            {
                name:"userConfig",
                children:[
                    {
                        name:"rolesMenge",
                        meta:{
                            title:"rolesMenge"    
                        }
                    }
                ]
            },
        ]
    }
]

for (const node of nodes) { const subs = deal(node.children, predicate); // // 1. subs // 2. if ((subs && subs.length) || predicate(node)) { node.children = subs; newChildren.push(node); } }