Great validator! I noticed that while the schema supports type: 'array', the validation logic doesn't recursively validate array elements.

Current behavior:

police([1, 2, 3], { type: 'array' }); // Passes, but no element validation

Suggested enhancement: Add an items property to the schema to validate array elements:

export type Schema = {
  type: 'string' | 'number' | 'boolean' | 'object' | 'array';
  required?: string[];
  properties?: Record<string, Schema>;
  items?: Schema; // <-- New property
};

// In police() function:
if (schema.type === 'array' && schema.items) {
  data.forEach((item, index) => {
    police(item, schema.items!, `${path}[${index}]`);
  });
}

Use case:

const userListSchema: Schema = {
  type: 'array',
  items: {
    type: 'object',
    required: ['id', 'name'],
    properties: {
      id: { type: 'number' },
      name: { type: 'string' }
    }
  }
};

police(users, userListSchema); // Would validate each user

This would make struct-police much more useful for validating complex nested data structures. Happy to submit a PR if you'd like!

Missing array element validation#2