let myArray = [
  { name: "John", age: 23 },
  { name: "Jane", age: 21 },
  { name: "Jim", age: 25 }
];

myArray.sort(function(a, b) {
  var nameA = a.name.toUpperCase(); // ignore upper and lowercase
  var nameB = b.name.toUpperCase(); // ignore upper and lowercase
  if (nameA < nameB) {
    return -1;
  }
  if (nameA > nameB) {
    return 1;
  }

  // names must be equal
  return 0;
});

console.log(myArray);

When using variables in a "for" loop in a function, there are several common pitfalls to be aware of:

Variable scope: Variables declared with var inside a for loop are function-scoped, not block-scoped. This means that if you declare a variable inside a for loop and then try to access it outside the loop, you may run into unexpected behavior.

Variable hoisting: If you declare a variable inside a for loop using var, the variable declaration will be hoisted to the top of the function. This means that the variable will be accessible from anywhere within the function, even outside the for loop.