I have some array of strings like this

const doc = ['TEST', 'TEST1','TEST2']

What I need is to make function that I will create simple string from doc, that will have some different text.

1. If there is just one array member to show

   const text = 'There is 1 doc TEST1';

2. If there is two array member to show

   const text = 'There is doc TEST1 and TEST2';

3. If there is more than twoarray member to show, of course this doc array can have more than 3 array members, but this is just example

   const text = 'There is doc TEST1, TEST2 and TEST3';

Thanks in advance I don't know how even to start

CodePudding user response：

function toSentence(arr){
  if(arr.length===1)return `There is 1 doc ${arr[0]}`;
  const last = arr.pop();
  const others=arr.join(", ");
  return `There are docs ${others} and ${last}`
}

CodePudding user response：

You can use join for all but the last entry, and add the last entry with "and". I suppose for an empty array you would return something like "there is no doc":

function makePhrase(arr) {
    if (arr.length === 0) return "There is no doc";
    if (arr.length === 1) return "There is 1 doc "   arr;
    return "There is doc "  
        arr.slice(0, -1).join(", ")   " and "   arr.at(-1);
}

console.log(makePhrase([]));
console.log(makePhrase(["test1"]));
console.log(makePhrase(["test1", "test2"]));
console.log(makePhrase(["test1", "test2", "test3"]));
console.log(makePhrase(["test1", "test2", "test3", "test4"]));