js集合数据分组组合

现有数据格式 [{"id":"5ce5320ec2b2693d249e272c","province":"山东","schools":["山东师范大学","青岛科技大学","山东建筑大学","青岛大学","济南大学","山东大学","中国石油大学(华东)","山东财经大学","山东农业大学","哈尔滨工业大学(威海)","中国海洋大学"]},{"id":"5ce5320ec2b2693d249e2

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