Who likes it?

6 kyu

題目描述

Description

You probably know the "like" system from Facebook and other pages. People can "like" blog posts, pictures or other items. We want to create the text that should be displayed next to such an item.

Implement the function which takes an array containing the names of people that like an item. It must return the display text as shown in the examples:

[]                                -->  "no one likes this"  
["Peter"]                         -->  "Peter likes this"  
["Jacob", "Alex"]                 -->  "Jacob and Alex like this"  
["Max", "John", "Mark"]           -->  "Max, John and Mark like this"  
["Alex", "Jacob", "Mark", "Max"]  -->  "Alex, Jacob and 2 others like this"  

Note: For 4 or more names, the number in "and 2 others" simply increases.

解答

Solution

function likes(names) {
  if (names.length === 0) {
    return "no one likes this";
  }

  if (names.length === 1) {
    return `${names[0]} likes this`;
  }

  if (names.length === 2) {
    return `${names[0]} and ${names[1]} like this`;
  }

  if (names.length === 3) {
    return `${names[0]}, ${names[1]} and ${names[2]} like this`;
  }

  if (names.length >= 4) {
    return `${names[0]}, ${names[1]} and ${names.length - 2} others like this`;
  }
}

解題思路

題目要求超簡單所以就超級暴力解

心得

練習把腦中思考快速轉成 JS 程式碼