Convert JSON snake-case (underscore) keys to camel-case keys

json_snake_keys_to_camel_keys.js

/**
 * @author ntd251
 * @dependency underscore.js
 * @example
 *
 * input = {
 *   arrayItems: [
 *     numericKey: 10,
 *     jsonKey: {
 *       textValue: 'ok'
 *     }
 *   ]
 * }
 *
 * output = {
 *   array_items: [
 *     numberic_key: 10,
 *     json_key: {
 *       text_value: 'ok'
 *     }
 *   ]
 * }
 */
function snakeToCamel(json) {
  /**
   * string, number, null, undefined, boolean, ...
   */
  if (!json || typeof json !== 'object') {
    return json;
  }

  /**
   * Array
   */
  if (json.constructor.name === 'Array') {
    return json.map((item) => (snakeToCamel(item)));
  }

  /**
   * JSON
   */
  let output = {};

  Object.keys(json).forEach((key) => {
    let value = json[key];
    let newKey = key.includes('_') ? _.string.camelize(key) : key;

    output[newKey] = snakeToCamel(value);  
  });

  return output;
}