2633. Convert Object to JSON String

https://leetcode.com/problems/convert-object-to-json-string/

Javascript

var jsonStringify = function(object) {
    // 1. Pure type
    if (typeof object !== 'object') {
        return typeof object === "string" ? `"${object}"` : object.toString()
    }
    if (object === null) {
        return 'null'
    }

    // 2. Array
    if (Array.isArray(object)) {
        let result = "["
        result += object.map((child) => jsonStringify(child))
        result += "]"
        return result
    }

    // 3. Object
    let result = "{"
    result += Object.keys(object)
        .map(key => `"${key}":${jsonStringify(object[key])}`)
        .join(',')
    result += "}"
    return result
};

Typescript

function jsonStringify(object: any): string {
    // 1. Pure type
    if (typeof object !== 'object') {
        return typeof object === "string" ? `"${object}"` : object.toString()
    }
    if (object === null) {
        return 'null'
    }

    // 2. Array
    if (Array.isArray(object)) {
        let result = "["
        result += object.map((child) => jsonStringify(child))
        result += "]"
        return result
    }

    // 3. Object
    let result = "{"
    result += Object.keys(object)
        .map(key => `"${key}":${jsonStringify(object[key])}`)
        .join(',')
    result += "}"
    return result
};