makeTree
let cat = [ {id:'a','paren':null}, {id:'b','paren':"a"}, {id:'c','paren':'b'}, {id:'d','paren':'b'}, {id:'e','paren':'d'}, {id:'f','paren':'d'}, {id:'g','paren':'e'}, ]
let makeTree=(cat,paren)=>{ let node ={} let aa=cat.filter(c=> c.paren===paren).forEach(c=> node[c.id]=makeTree(cat,c.id)) return node } console.log( JSON.stringify( makeTree(cat,null),null,2 ) )
返回结果
不积跬步,无以至千里;不积小流,无以成江海。