Question

我正在寻找一种删除数组其他元素的方法。但是我不知道该怎么做。

这是我的数组：

musics: [
          {
            id: 1,
            cover: require('~/assets/images/cover/music/ali_zand_vakili_jadeh_shab.jpg'),
            title: 'جاده شب',
            artist: 'علی زند وکیلی',
            source: 'http://media.mtvpersian.net/2019/Mar/21/Ali%20Zand%20Vakili%20-%20Jadeh%20Shab.mp3'
          },
          {
            id: 2,
            cover: require('~/assets/images/cover/music/amin_hayaei_divoone_misazi.jpg'),
            title: 'دیوونه میسازی',
            artist: 'امین حیایی',
            source: 'https://cdnmrtehran.ir/media/mp3s_128/Amin_Hayaei/Singles/amin_hayaei_divoone_misazi.mp3'
          },
          {
            id: 3,
            cover: require('~/assets/images/cover/music/emad_talebzadeh_maghrour.jpg'),
            title: 'مغرور',
            artist: 'عماد طالب زاده',
            source: 'https://cdnmrtehran.ir/media/mp3s_128/Emad_Talebzadeh/Singles/emad_talebzadeh_maghrour.mp3'
          },
          {
            id: 4,
            cover: require('~/assets/images/cover/music/farzad_farzin_jazzab.jpg'),
            title: 'جذاب',
            artist: 'فرزاد فرزین',
            source: 'https://cdnmrtehran.ir/media/mp3s_128/Farzad_Farzin/Singles/farzad_farzin_jazzab.mp3'
          },
          {
            id: 5,
            cover: require('~/assets/images/cover/music/hamid_sefat_ajayeb_shahr_merat_remix.jpg'),
            title: 'عجایب شهر رمیکس',
            artist: 'حمید صفت',
            source: 'https://cdnmrtehran.ir/media/mp3s_128/Hamid_Sefat/Singles/hamid_sefat_ajayeb_shahr_merat_remix.mp3'
          }
        ],

如何删除ID为3的元素以外的所有元素？

Answer 1

您可以使用过滤器：https://developer.mozilla.org/de/docs/Web/JavaScript/Reference/Global_Objects/Array/filter

musics = musics.filter (x => x.id == 3)

Answer 2

var musics= [{id: 1,cover: '~/assets/images/cover/music/ali_zand_vakili_jadeh_shab.jpg',title: 'جاده شب',artist: 'علی زند وکیلی',source: 'http://media.mtvpersian.net/2019/Mar/21/Ali%20Zand%20Vakili%20-%20Jadeh%20Shab.mp3'},
{id: 2,cover: '~/assets/images/cover/music/amin_hayaei_divoone_misazi.jpg',title: 'دیوونه میسازی',artist: 'امین حیایی',source: 'https://cdnmrtehran.ir/media/mp3s_128/Amin_Hayaei/Singles/amin_hayaei_divoone_misazi.mp3'},
{id: 3,cover: '~/assets/images/cover/music/emad_talebzadeh_maghrour.jpg',title: 'مغرور',artist: 'عماد طالب زاده',source: 'https://cdnmrtehran.ir/media/mp3s_128/Emad_Talebzadeh/Singles/emad_talebzadeh_maghrour.mp3'},
{id: 4,cover: '~/assets/images/cover/music/farzad_farzin_jazzab.jpg',title: 'جذاب',artist: 'فرزاد فرزین',source: 'https://cdnmrtehran.ir/media/mp3s_128/Farzad_Farzin/Singles/farzad_farzin_jazzab.mp3'},
{id: 5,cover:'~/assets/images/cover/music/hamid_sefat_ajayeb_shahr_merat_remix.jpg',title: 'عجایب شهر رمیکس',artist: 'حمید صفت',source: 'https://cdnmrtehran.ir/media/mp3s_128/Hamid_Sefat/Singles/hamid_sefat_ajayeb_shahr_merat_remix.mp3'}]

var result =[];

musics.forEach(function(item){
  if(item.id == 3){
   result.push(item);
  }
});
console.log(result);

Answer 3

要删除所有偶数索引元素，可以使用以下命令：

musics = musics.filter((e, i) =>  i % 2 == 0)

要删除奇数，只需用！=更改==

JavaScript数组删除所有其他元素

3 个答案: