使用lodash检查其他元素集中是否存在元素集

Question

字段game_options设置了一些参数 我需要查看请求的选项是否与game_options

相同

game_options = ['ps2', 'pc']
request = ['ps2', 'pc', 'xbox']

此组合应返回false 但是这个：是的：

game_options = ['ps2', 'pc', 'xbox']
request = ['ps2', 'pc']

我用lodash完成了这个，但不确定它是否是正确的方法：

_ = require 'lodash'
hasAllRequestedOptions - (options, request) ->
  return true if _.intersection(game_options, request).length is request.length
  return false

Answer 1

您可以使用difference功能来实现：

game_options = ['ps2', 'pc'];
request = ['ps2', 'pc', 'xbox'];

console.log(_.difference(game_options, request).length > 0);

game_options = ['ps2', 'pc', 'xbox'];
request = ['ps2', 'pc'];

console.log(_.difference(game_options, request).length > 0);

Answer 2

var isPresented = _.intersection(game_options, request).length === request.length