javascript - 如何从数组中删除具有给定属性的对象

Question

我有一个包含多个对象的数组，如下所示。如何删除包含特定值的完整对象。

var cars=  [
{key: 'browser', label: 'Chrome'},
{key: 'browser', label: 'Firefox'},
{key: 'browser', label: 'Safari'}
];

例如，要删除的对象是包含标签 chrome 和 safari 的对象。

我遇到过一维值数组的示例，但这是一个对象数组。

Answer 1

您可以使用Array.prototype.filter仅返回某些值或仅排除某些值。

var cars =  [
  {key: 'browser', label: 'Chrome'},
  {key: 'browser', label: 'Firefox'},
  {key: 'browser', label: 'Safari'}
];

// Filter by only the thing you want
var firefoxOnly = cars.filter(function(item) {
  return item.label === 'Firefox';
});

console.log(firefoxOnly);

// filter out the things you don't want
var notChromeSafari  = cars.filter(function(item) {
  return item.label !== 'Chrome' && item.label !== 'Safari';
});

console.log(notChromeSafari);

// or make a set of exclusions to filter out things you don't want
// you could also make this a list of inclusions, 
// it would be the inverse of this. I'll leave that as an exercise for the reader.
var exclusions = ['Chrome', 'Safari'];

var filtered  = cars.filter(function(item) {
  // only return items that are not in the exclusion list
  return exclusions.indexOf(item.label) === -1;
});

console.log(filtered);