javascript check if an array has same consecutive values
const arr = ["g", "z", "z", "v" ,"b", "b", "b"]; const checkThree = arr => { const prev = { element: null, count: 0 }; for(let i = 0; i < arr.length; i++){ const { count, element } = prev; if(count === 2 && element === arr[i]){ return true; }; prev.count = element === arr[i] ? count + 1 : count; prev.element = arr[i]; }; return false; }; console.log(checkThree(arr)); console.log(checkThree(["z", "g", "z", "z"]));
