excel文档

1.快速统计行数（ctrl+Shift+(方向键向下)）。

 

bson数据类型

留个影响

public enum BsonType { Double = 0x01, String = 0x02, Document = 0x03, Array = 0x04, Binary = 0x05, Undefined = 0x06, ObjectId = 0x07, Boolean = 0x08, DateTime = 0x09, Null = 0x0a, RegularExpression = 0x0b, JavaScript = 0x0d, Symbol = 0x0e, JavaScriptWithScope = 0x0f, Int32 = 0x10, Timestamp = 0x11, Int64 = 0x12, MinKey = 0xff, MaxKey = 0x7f }