export function isEqual(x, y) {
  if (x === y) {
    return true;
  } else if (
    typeof x === "object" &&
    x !== null &&
    typeof y === "object" &&
    y !== null
  ) {
    const keysX = Object.keys(x);
    const keysY = Object.keys(y);
    if (keysX.length !== keysY.length) {
      return false;
    }
    for (const key of keysX) {
      if (!isEqual(x[key], y[key])) {
        return false;
      }
    }
    return true;
  } else {
    return false;
  }
}

export function debounce(fn, wait) {
  let timer;
  return function () {
    let _this = this;
    let args = arguments;
    if (timer) {
      clearTimeout(timer);
    }
    timer = setTimeout(function () {
      fn.apply(_this, args);
    }, wait);
  };
}

export function throttle(fn, wait) {
  let timer;
  return function () {
    let _this = this;
    let args = arguments;

    if (!timer) {
      timer = setTimeout(function () {
        timer = null;
        fn.apply(_this, args);
      }, wait);
    }
  };
}

function isObject(value) {
  const type = typeof value
  return value != null && (type === 'object' || type === 'function')
}

export default isObject