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// function linerSearch(target, searchTarget)　{
//   let i = 0;
//   const l = searchTarget.length;
//   while(i < l && target > searchTarget[i]) i++;
//   if(target === searchTarget[i]) return i;
//   return null;
// }

function linerSearch(target, searchTarget) {
  for(let i=0; i<searchTarget.length && target >= searchTarget[i]; i++) {
    if (target === searchTarget[i]) return i;
  }
  return null;
}

const arrayObject = [2,4,8,16,32,64];

console.log(linerSearch(64, arrayObject));