yogurt

``` function findNode(obj) { const track = []; let res = []; function dfs(obj, target) { if(!obj) { return; } if(obj.id === target) { track.push(obj.id); res = [...track]; return; }...

``` function toObj(arr) { let obj = {}; arr.forEach(item => { let letter = item.charAt(0); obj[letter] = obj[letter] !== undefined ? [...obj[letter], item] : [item]; }) return obj; } ```