如何根据数组值

Question

我有这个数组

[furnitures] => Array
(
    [0] => Array
    (
        [fi_id] => 8
        [price] => 15.00
    )
    [1] => Array
    (
        [fi_id] => 8
        [price] => 15.00
    )
    [2] => Array
    (
        [fi_id] => 7
        [price] => 15.00
    )
    [3] => Array
    (
        [fi_id] => 7
        [price] => 15.00
    )
    [4] => Array
    (
        [fi_id] => 8
        [price] => 15.00
    )
    [5] => Array
    (
        [fi_id] => 9
        [price] => 15.00
    )
)

我想从中获得独特的fi_id，我也想从中计算出来。这个代表了多少次。 PHP有内置函数吗？

像独特的项目一样，7,8,9和7代表2次，8代表3次，9代表1次。

Answer 1

你可以试试这个：

export function personnelReducer(state = initialState, action: PersonnelActions.PersonnelActions) {
..........
}