对象的array_unique? [英] array_unique for objects?

问题描述

有没有像对象的array_unique这样的方法?我有一堆带有我合并的角色"对象的数组，然后我想取出重复项:)

Is there any method like the array_unique for objects? I have a bunch of arrays with 'Role' objects that I merge, and then I want to take out the duplicates :)

推荐答案

好吧，array_unique() 比较元素的字符串值:

Well, array_unique() compares the string value of the elements:

注意:当且仅当 (string) $elem1 === (string) $elem2 即当字符串表示相同时，才认为两个元素相等，将使用第一个元素.

Note: Two elements are considered equal if and only if (string) $elem1 === (string) $elem2 i.e. when the string representation is the same, the first element will be used.

所以一定要实现__toString() 类中的方法，并且它为相同的角色输出相同的值，例如

So make sure to implement the __toString() method in your class and that it outputs the same value for equal roles, e.g.

class Role {
    private $name;

    //.....

    public function __toString() {
        return $this->name;
    }

}

如果两个角色具有相同的名称，这将认为它们是平等的.

This would consider two roles as equal if they have the same name.

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