Krdytkyu

a.reduce( (res, v, i) => i === a.length - 2 ? res + v + ' and ' : res + v + ( i == a.length -1? '' : ', '), '' )

a.reduce( (res, v, i) => i === a.length - 2 ? res + v + ' and ' : res + v + ( i == a.length -1? '' : ', '), '' )

a.reduce( (res, v, i) => i === a.length - 2 ? res + v + ' and ' : res + v + ( i == a.length -1? '' : ', '), '' )

a.reduce( (res, v, i) => i === a.length - 2 ? res + v + ' and ' : res + v + ( i == a.length -1? '' : ', '), '' )

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Your Answer

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const input = ['one', 'two', 'three', 'four'];

const last = input.pop();

const result = input.join(', ') + ' and ' + last;

console.log(result);

const input = ['one', 'two', 'three', 'four'];

const last = input.pop();

const result = input.join(', ') + ' and ' + last;

console.log(result);

const input = ['one', 'two', 'three', 'four'];

const last = input.pop();

const result = input.join(', ') + ' and ' + last;

console.log(result);

const input = ['one', 'two', 'three', 'four'];

const last = input.pop();

const result = input.join(', ') + ' and ' + last;

console.log(result);

const input = ['one', 'two', 'three', 'four'];

const last = input.pop();

const result = input.join(', ') + ' and ' + last;

console.log(result);

const input = ['one', 'two', 'three', 'four'];

const last = input.pop();

const result = input.join(', ') + ' and ' + last;

console.log(result);

add a comment | 

function makeCommaSeparatedString(arr, useOxfordComma) {

    const listStart = arr.slice(0, -1).join(', ');

    const listEnd = arr.slice(-1);

    const conjunction = arr.length <= 1 ? '' :

        useOxfordComma && arr.length > 2 ? ', and ' : ' and ';



    return [listStart, listEnd].join(conjunction);

}



console.log(makeCommaSeparatedString(['one', 'two', 'three', 'four']));

// one, two, three and four

console.log(makeCommaSeparatedString(['one', 'two', 'three', 'four'], true));

// one, two, three, and four

console.log(makeCommaSeparatedString(['one', 'two'], true));

// one and two

console.log(makeCommaSeparatedString(['one']));

// one

console.log(makeCommaSeparatedString());

// 

function makeCommaSeparatedString(arr, useOxfordComma) {

    const listStart = arr.slice(0, -1).join(', ');

    const listEnd = arr.slice(-1);

    const conjunction = arr.length <= 1 ? '' :

        useOxfordComma && arr.length > 2 ? ', and ' : ' and ';



    return [listStart, listEnd].join(conjunction);

}



console.log(makeCommaSeparatedString(['one', 'two', 'three', 'four']));

// one, two, three and four

console.log(makeCommaSeparatedString(['one', 'two', 'three', 'four'], true));

// one, two, three, and four

console.log(makeCommaSeparatedString(['one', 'two'], true));

// one and two

console.log(makeCommaSeparatedString(['one']));

// one

console.log(makeCommaSeparatedString());

// 

function makeCommaSeparatedString(arr, useOxfordComma) {

    const listStart = arr.slice(0, -1).join(', ');

    const listEnd = arr.slice(-1);

    const conjunction = arr.length <= 1 ? '' :

        useOxfordComma && arr.length > 2 ? ', and ' : ' and ';



    return [listStart, listEnd].join(conjunction);

}



console.log(makeCommaSeparatedString(['one', 'two', 'three', 'four']));

// one, two, three and four

console.log(makeCommaSeparatedString(['one', 'two', 'three', 'four'], true));

// one, two, three, and four

console.log(makeCommaSeparatedString(['one', 'two'], true));

// one and two

console.log(makeCommaSeparatedString(['one']));

// one

console.log(makeCommaSeparatedString());

// 

function makeCommaSeparatedString(arr, useOxfordComma) {

    const listStart = arr.slice(0, -1).join(', ');

    const listEnd = arr.slice(-1);

    const conjunction = arr.length <= 1 ? '' :

        useOxfordComma && arr.length > 2 ? ', and ' : ' and ';



    return [listStart, listEnd].join(conjunction);

}



console.log(makeCommaSeparatedString(['one', 'two', 'three', 'four']));

// one, two, three and four

console.log(makeCommaSeparatedString(['one', 'two', 'three', 'four'], true));

// one, two, three, and four

console.log(makeCommaSeparatedString(['one', 'two'], true));

// one and two

console.log(makeCommaSeparatedString(['one']));

// one

console.log(makeCommaSeparatedString());

// 

function makeCommaSeparatedString(arr, useOxfordComma) {

    const listStart = arr.slice(0, -1).join(', ');

    const listEnd = arr.slice(-1);

    const conjunction = arr.length <= 1 ? '' :

        useOxfordComma && arr.length > 2 ? ', and ' : ' and ';



    return [listStart, listEnd].join(conjunction);

}



console.log(makeCommaSeparatedString(['one', 'two', 'three', 'four']));

// one, two, three and four

console.log(makeCommaSeparatedString(['one', 'two', 'three', 'four'], true));

// one, two, three, and four

console.log(makeCommaSeparatedString(['one', 'two'], true));

// one and two

console.log(makeCommaSeparatedString(['one']));

// one

console.log(makeCommaSeparatedString());

// 

function makeCommaSeparatedString(arr, useOxfordComma) {

    const listStart = arr.slice(0, -1).join(', ');

    const listEnd = arr.slice(-1);

    const conjunction = arr.length <= 1 ? '' :

        useOxfordComma && arr.length > 2 ? ', and ' : ' and ';



    return [listStart, listEnd].join(conjunction);

}



console.log(makeCommaSeparatedString(['one', 'two', 'three', 'four']));

// one, two, three and four

console.log(makeCommaSeparatedString(['one', 'two', 'three', 'four'], true));

// one, two, three, and four

console.log(makeCommaSeparatedString(['one', 'two'], true));

// one and two

console.log(makeCommaSeparatedString(['one']));

// one

console.log(makeCommaSeparatedString());

// 

add a comment | 

let input = ['one', 'two', 'three', 'four'];

let removed = input.splice(-2, 2);

input.push(removed.join(" and "));    



console.log(input.join(", "));

let input = ['one', 'two', 'three', 'four'];

let removed = input.splice(-2, 2);

input.push(removed.join(" and "));    



console.log(input.join(", "));

let input = ['one', 'two', 'three', 'four'];

let removed = input.splice(-2, 2);

input.push(removed.join(" and "));    



console.log(input.join(", "));

let input = ['one', 'two', 'three', 'four'];

let removed = input.splice(-2, 2);

input.push(removed.join(" and "));    



console.log(input.join(", "));

let input = ['one', 'two', 'three', 'four'];

let removed = input.splice(-2, 2);

input.push(removed.join(" and "));    



console.log(input.join(", "));

let input = ['one', 'two', 'three', 'four'];

let removed = input.splice(-2, 2);

input.push(removed.join(" and "));    



console.log(input.join(", "));

add a comment | 

const input = ['one', 'two', 'three', 'four'];

const result = `${input.slice(0, -1).join(', ')} and ${input.slice(-1)}`;

  

console.log(result);

const input = ['A Tale of Two Cities', 'Harry Potter and the smth', 'One Fish, Two Fish, Red Fish, Blue Fish'];

const result = `${input.slice(0, -1).join(', ')} and ${input.slice(-1)}`;



console.log(result);

const input = ['one', 'two', 'three', 'four'];

const result = `${input.slice(0, -1).join(', ')} and ${input.slice(-1)}`;

  

console.log(result);

const input = ['A Tale of Two Cities', 'Harry Potter and the smth', 'One Fish, Two Fish, Red Fish, Blue Fish'];

const result = `${input.slice(0, -1).join(', ')} and ${input.slice(-1)}`;



console.log(result);

const input = ['one', 'two', 'three', 'four'];

const result = `${input.slice(0, -1).join(', ')} and ${input.slice(-1)}`;

  

console.log(result);

const input = ['A Tale of Two Cities', 'Harry Potter and the smth', 'One Fish, Two Fish, Red Fish, Blue Fish'];

const result = `${input.slice(0, -1).join(', ')} and ${input.slice(-1)}`;



console.log(result);

const input = ['one', 'two', 'three', 'four'];

const result = `${input.slice(0, -1).join(', ')} and ${input.slice(-1)}`;

  

console.log(result);

const input = ['A Tale of Two Cities', 'Harry Potter and the smth', 'One Fish, Two Fish, Red Fish, Blue Fish'];

const result = `${input.slice(0, -1).join(', ')} and ${input.slice(-1)}`;



console.log(result);

const input = ['one', 'two', 'three', 'four'];

const result = `${input.slice(0, -1).join(', ')} and ${input.slice(-1)}`;

  

console.log(result);

const input = ['one', 'two', 'three', 'four'];

const result = `${input.slice(0, -1).join(', ')} and ${input.slice(-1)}`;

  

console.log(result);

const input = ['A Tale of Two Cities', 'Harry Potter and the smth', 'One Fish, Two Fish, Red Fish, Blue Fish'];

const result = `${input.slice(0, -1).join(', ')} and ${input.slice(-1)}`;



console.log(result);

const input = ['A Tale of Two Cities', 'Harry Potter and the smth', 'One Fish, Two Fish, Red Fish, Blue Fish'];

const result = `${input.slice(0, -1).join(', ')} and ${input.slice(-1)}`;



console.log(result);

add a comment |