Javascript - sort array of strings in a custom way

问题:

I have an array of strings:

var players = [{Name: player1name, Surname: player1surname, Position: "Centre back"}, {Name: player2name, Surname: player2surname, Position: "Striker"}, {Name: player3name, Surname: player3surname, Position: "Full back"}, {Name: player4name, Surname: player4surname, Position: "Goalkeeper"}, {Name: player5name, Surname: player5surname, Position: "Midfielder"}, {Name: player6name, Surname: player6surname, Position: "Winger"}];

Order of an array items is not always the same. I want to sort that array so it goes like this: Goalkeeper, Full back, Centre back, Midfielder, Winger, Striker. I'm thinking about enums but I don't know how to use them in this situation.

回答1:

You could take an object for the sort order and then sort by the difference.

var players = ["Centre back", "Striker", "Full back", "Goalkeeper", "Midfielder", "Winger"],
    order = { Goalkeeper: 1, 'Full back': 2, 'Centre back': 3, Midfielder: 4, Winger: 5, Striker: 6 };
    
players.sort(function (a, b) {
    return order[a] - order[b];
});

console.log(players);

回答2:

There you go. You should use this approach. You need to create a ranking map and then sort by that map.

let players = [
    {
    "name": "Molla Wague",
    "position": "Centre-Back",
    "jerseyNumber": 13,
    "dateOfBirth": "1991-02-21",
    "nationality": "Mali",
    "contractUntil": "2018-06-30",
    "marketValue": null
    },
    {
    "name": "Heurelho Gomes",
    "position": "Keeper",
    "jerseyNumber": 1,
    "dateOfBirth": "1981-02-15",
    "nationality": "Brazil",
    "contractUntil": "2019-06-30",
    "marketValue": null
    },
    {
    "name": "Christian Kabasele",
    "position": "Centre-Back",
    "jerseyNumber": 27,
    "dateOfBirth": "1991-02-24",
    "nationality": "Belgium",
    "contractUntil": "2021-06-30",
    "marketValue": null
    },
    {
    "name": "José Holebas",
    "position": "Left-Back",
    "jerseyNumber": 25,
    "dateOfBirth": "1984-06-27",
    "nationality": "Greece",
    "contractUntil": "2020-06-30",
    "marketValue": null
    },
    {
    "name": "Daryl Janmaat",
    "position": "Right-Back",
    "jerseyNumber": 2,
    "dateOfBirth": "1989-07-22",
    "nationality": "Netherlands",
    "contractUntil": "2020-06-30",
    "marketValue": null
    },
    {
    "name": "Étienne Capoue",
    "position": "Defensive Midfield",
    "jerseyNumber": 29,
    "dateOfBirth": "1988-07-11",
    "nationality": "France",
    "contractUntil": "2019-06-30",
    "marketValue": null
    },
    {
    "name": "Tom Cleverley",
    "position": "Central Midfield",
    "jerseyNumber": 8,
    "dateOfBirth": "1989-08-12",
    "nationality": "England",
    "contractUntil": "2022-06-30",
    "marketValue": null
    },
    {
    "name": "Roberto Pereyra",
    "position": "Attacking Midfield",
    "jerseyNumber": 37,
    "dateOfBirth": "1991-01-07",
    "nationality": "Argentina",
    "contractUntil": "2021-06-30",
    "marketValue": null
    },
    {
    "name": "Troy Deeney",
    "position": "Centre-Forward",
    "jerseyNumber": 9,
    "dateOfBirth": "1988-06-29",
    "nationality": "England",
    "contractUntil": "2021-06-30",
    "marketValue": null
    }
];
const rankMap = {
	'Keeper': 1,
    'Centre-Back': 2,
    'Right-Back': 3,
    'Left-Back': 4,
    'Defensive Midfield': 5,
    'Central Midfield': 6,
    'Attacking Midfield': 7,
    'Right Wing': 8,
    'Left Wing': 9,
    'Centre-Forward': 10
};

players = players.sort((a, b) => rankMap[a.position] - rankMap[b.position]);

console.log(players);