JavaScript:实现检查给定的字符串是否在snake_case中算法
// CheckSnakeCase method checks the given string is in snake_case or not.
// Problem Source & Explanation:
/**
* checkSnakeCase method returns true if the string in snake_case, else return the false.
* @param {String} varName the name of the variable to check.
* @returns `Boolean` return true if the string is in snake_case, else return false.
*/
const checkSnakeCase = (varName