cotton

SQL Database Toolkit for Deno

https://github.com/rahmanfadhil/cotton
/**
 * Check if two objects are equal
 * Copied from https://github.com/epoberezkin/fast-deep-equal (MIT licensed)
 *
 * @param a the object to compare
 * @param b the other object which expected to be equal
 */
export function deepEqual(a: any, b: any) {
  if (a === b) return true;

  if (a && b && typeof a == "object" && typeof b == "object") {
    if (a.constructor !== b.constructor) return false;

    var length, i, keys;
    if (Array.isArray(a)) {
      length = a.length;
      if (length != b.length) return false;
      for (i = length; i-- !== 0;) {
        if (!deepEqual(a[i], b[i])) return false;
      }
      return true;
    }

    if (a.constructor === RegExp) {
      return a.source === b.source && a.flags === b.flags;
    }
    if (a.valueOf !== Object.prototype.valueOf) {
      return a.valueOf() === b.valueOf();
    }
    if (a.toString !== Object.prototype.toString) {
      return a.toString() === b.toString();
    }

    keys = Object.keys(a);
    length = keys.length;
    if (length !== Object.keys(b).length) return false;

    for (i = length; i-- !== 0;) {
      if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;
    }

    for (i = length; i-- !== 0;) {
      var key = keys[i];
      if (!deepEqual(a[key], b[key])) return false;
    }

    return true;
  }

  // true if both NaN, false otherwise
  return a !== a && b !== b;
}