过滤 Map 并减少

Question

How can I write the function to filter the players who have won a particular award say FIFA FIFPro World XI award using the methods map, filter and reduce only.

No need to use the loops.

let players = [
      {
        name: "Marcelo",
        age: 30,
        debut: 2007,
        team: "Real Madrid",
        position: "Defender",
        country: "Brazil",
        url:
          "https://media.guim.co.uk/7247cfe16161d428218f34b5b0d7e5485bfa84a2/152_149_2221_1333/500.jpg",
        awards: [
          {
            name: "FIFA FIFPro World XI",
            year: 2019
          }
        ]
      },
      {
        name: "Virgil van Dijk",
        age: 26,
        debut: 2011,
        team: "Liverpool",
        position: "Defender",
        country: "Netherlands",
        url:
          "https://media.guim.co.uk/e798a161e0ecd2b27895aa6e5e8f29351db0d98c/0_130_5472_3283/500.jpg",
        awards: [
          {
            name: "UEFA Men's Player of the Year Award",
            year: 2019
          },
          {
            name: "FIFA FIFPro World X",
            year: 2019
          }
        ]
      }
    ];

Answer 1

Using Array.filter and Array.some seems to be the easiest way:

 let players = [ { name: "Marcelo", age: 30, debut: 2007, team: "Real Madrid", position: "Defender", country: "Brazil", url: "https://media.guim.co.uk/7247cfe16161d428218f34b5b0d7e5485bfa84a2/152_149_2221_1333/500.jpg", awards: [ { name: "FIFA FIFPro World XI", year: 2019 } ] }, { name: "Virgil van Dijk", age: 26, debut: 2011, team: "Liverpool", position: "Defender", country: "Netherlands", url: "https://media.guim.co.uk/e798a161e0ecd2b27895aa6e5e8f29351db0d98c/0_130_5472_3283/500.jpg", awards: [ { name: "UEFA Men's Player of the Year Award", year: 2019 }, { name: "FIFA FIFPro World X", year: 2019 } ] } ]; let awarded = players.filter( player => player.awards.some( award => award.name === 'FIFA FIFPro World XI')); console.log(awarded);

Answer 2

Using only filter and map .

 let players = [ { name: "Marcelo", age: 30, debut: 2007, team: "Real Madrid", position: "Defender", country: "Brazil", url: "https://media.guim.co.uk/7247cfe16161d428218f34b5b0d7e5485bfa84a2/152_149_2221_1333/500.jpg", awards: [ { name: "FIFA FIFPro World XI", year: 2019 } ] }, { name: "Virgil van Dijk", age: 26, debut: 2011, team: "Liverpool", position: "Defender", country: "Netherlands", url: "https://media.guim.co.uk/e798a161e0ecd2b27895aa6e5e8f29351db0d98c/0_130_5472_3283/500.jpg", awards: [ { name: "UEFA Men's Player of the Year Award", year: 2019 }, { name: "FIFA FIFPro World X", year: 2019 } ] } ]; let playersFiltered = players.filter((player) => { let haveWonAtLeastOneAward = player.awards.map((award) => { return award.name.includes('FIFA FIFPro World XI'); }).includes(true); return haveWonAtLeastOneAward; }); console.log(playersFiltered);