• Sorting an Object’s Keys in Ascending Order

function sortObjectByKeys(obj) {
    return Object.keys(obj)
        .sort() // Sort keys in ascending order
        .reduce((sortedObj, key) => {
            sortedObj[key] = obj[key];
            return sortedObj;
        }, {});
}

• Sorting an Object’s Keys in Descending Order

function sortObjectByKeysDescending(obj) {
  return Object.keys(obj)
    .sort((a, b) => b.localeCompare(a)) // Sort keys in descending order
    .reduce((sortedObj, key) => {
      sortedObj[key] = obj[key]; // Insert into new object in the order of sorted keys
      return sortedObj;
    }, {});
}

• Comparing Two Objects for Equality of Keys and Values

function areObjectsEqual(obj1, obj2) {
    if (Object.keys(obj1).length !== Object.keys(obj2).length) return false;
    for (let key in obj1) {
        if (obj1[key] !== obj2[key]) return false;
    }
    return true;
}

After upgrading Node.js, you may encounter errors when loading scripts.

If you’re seeing openSSL errors, try enabling legacy mode as follows:

export NODE_OPTIONS=--openssl-legacy-provider

"scripts": {
  "build": "NODE_OPTIONS=--openssl-legacy-provider webpack --mode production"
}

In JavaScript, floating-point numbers are represented using the 64-bit floating-point format defined by the IEEE 754 standard.

Some numbers cannot be represented exactly, which can lead to errors.

Issues with Floating-Point Numbers

1. Limitations of Binary Representation: Some decimal fractions cannot be represented exactly in binary form. For example, numbers like 0.1 or 0.2 become repeating decimals when converted to binary floating-point and are stored as approximations.

console.log(0.1 + 0.2); // 예상: 0.3, 실제: 0.30000000000000004

2. Loss of Precision: Small errors during calculations can accumulate into significant errors. This is particularly problematic in iterative calculations or financial computations.

Solutions

1. Using the toFixed() Method

The toFixed() method rounds a number to a specified number of decimal places and returns it as a string.