如果Typescript中的数组为空，则从嵌套数组中删除对象

Question

How can I remove the object if the nested array is empty. Like I have an array:

pokemonGroups = [
    {
      name: 'Grass',
      pokemon: [
        'bulbasaur-0', 'Bulbasaur', 'oddish-1','Oddish','bellsprout-2', 'Bellsprout'
      ]
    },
    {
      name: 'Water',
      pokemon: [

      ]
    }]

So In this we have an empty array

{
   name: 'Water',
   pokemon: []
}

So I want to remove this object and my array should be like:

pokemonGroups = [
    {
      name: 'Grass',
      pokemon: [
        'bulbasaur-0', 'Bulbasaur', 'oddish-1','Oddish','bellsprout-2', 'Bellsprout'
      ]
    }
 ]

Answer 1

您可以使用过滤器：

pokemonGroups = pokemonGroups.filter(group => group.pokemon.length != 0);

Answer 2

You can iterate your array and use array.splice()

 var pokemonGroups = [{ name: 'Grass', pokemon: [ 'bulbasaur-0', 'Bulbasaur', 'oddish-1', 'Oddish', 'bellsprout-2', 'Bellsprout' ] }, { name: 'Water', pokemon: [ ] } ] for (var i = 0; i < pokemonGroups.length; i++) { if (pokemonGroups[i]['pokemon'].length == 0) { pokemonGroups.splice(i, 1); } } console.log(pokemonGroups)