英文:
Sort an array of objects by property AND alphabetically
问题
我知道如何按一个属性对对象数组进行排序，但不知道如何再次按字母顺序重新排序数组（同时保持按属性排序）。
例如，我有一个数组：
[
{title: 'Hello', category: 'something'},
{title: 'Good', category: 'something else'},
{title: 'Monday', category: 'something'},
{title: 'Evening', category: 'something'},
{title: 'Food', category: 'others'}
]
要按类别对数组进行排序：
array.sort((a, b) => -b.category.localeCompare(a.category))
然而，如何在这个数组中按每个类别按字母顺序对项目进行排序，同时保持按类别排序的元素？
英文:
I understand how to sort an an array of objects by one property, but not how to re-sort the array again alphabetically (while keeping the sorting by property).
For example, I have an array:
[
{title: 'Hello', category: 'something'},
{title: 'Good', category: 'something else'},
{title: 'Monday', category: 'something'},
{title: 'Evening', category: 'something'}, {title: 'Food', category: 'others'}
]
To sort the array by category:
array.sort(
(a, b) => -b.category.localeCompare(a.category)
)
However, how can I sort the items in each category alphabetically, in this array, while keeping the elements sorted by the category?
答案1
得分: 2
If localeCompare returns 0, compare another field
const array = [{
title: 'Hello',
category: 'something'
},
{
title: 'Good',
category: 'something else'
},
{
title: 'Monday',
category: 'something'
},
{
title: 'Evening',
category: 'something'
}, {
title: 'Food',
category: 'others'
}
]
array.sort(
(a, b) => {
const category = -b.category.localeCompare(a.category)
if (category) return category
return a.title.localeCompare(b.title)
}
)
console.log(array)
Note: I've only provided the translation of the code portion as requested.
英文:
If localeCompare returns 0, compare another field
<!-- begin snippet: js hide: false console: true babel: false -->
<!-- language: lang-js -->
const array = [{
title: 'Hello',
category: 'something'
},
{
title: 'Good',
category: 'something else'
},
{
title: 'Monday',
category: 'something'
},
{
title: 'Evening',
category: 'something'
}, {
title: 'Food',
category: 'others'
}
]
array.sort(
(a, b) => {
const category = -b.category.localeCompare(a.category)
if (category) return category
return a.title.localeCompare(b.title)
}
)
console.log(array)
<!-- end snippet -->
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