删除基于属性的数组中的特定对象? [英] Removing Specific Object In Array Based On Property?

问题描述

我有一系列的饮料配料，并且想要删除与饮料无关的配料，这是我的代码，但是我不知道如何从数组中删除配料不在标准之内.

我只能在索引路径处删除，并且如果我们添加更多的浇头等，这可能会改变，所以看起来不太准确?

for toppings in self.toppings {
    if self.selectedDrink.name == "Tea" {
        if toppings.limit == "C" {
            self.toppings.remove(at: toppings)
        }
    }
}

基本上，如果用户选择茶"，它会寻找咖啡的浇头，然后我需要删除那些响应"C"属性的浇头，但我看不到如何?

感谢您的帮助！

解决方案

您可以使用for循环进行就地删除，但这会很棘手，因为您需要迭代回去以避免干扰索引. /p>

一种更简单的方法是过滤数组，并将其分配回toppings属性，如下所示:

toppings = toppings.filter {$0.limit != "C"}

I have an array of drink toppings and want to remove the ones that aren't relevant to the drink, this is the code I have, but I can't figure out how to remove the topping from the array if it isn't within the criteria.

I can only remove at index path and this can change if we added more toppings etc so didn't seem accurate?

for toppings in self.toppings {
    if self.selectedDrink.name == "Tea" {
        if toppings.limit == "C" {
            self.toppings.remove(at: toppings)
        }
    }
}

Essentially if the user selected Tea it looks for toppings limited for coffee and then I need to remove those ones that respond to the "C" property, but I can't see how?

Thanks for the help!

解决方案

You can do in-place removal with a for loop, but it would be tricky, because you would need to iterate back to avoid disturbing indexes.

A simpler approach is to filter the array, and assign it back to the toppings property, like this:

toppings = toppings.filter {$0.limit != "C"}

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