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• BinData()

BinData()

Definition

Creates a binary data object.

BinData has the following syntax:

BinData(<sub_type>, <buffer>)

Parameter	Type	Description
sub_type	string	The binary type. Subtype Description 0 Generic binary subtype 1 Function 2 Byte Array 3 OLD UUID 4 UUID 5 MD5 128 User defined
buffer	string	The buffer object containing binary data, must be a base 64 encoded string value.

Returns:A binary data object.

Examples

Insert a BinData() Object

Use the BinData() constructor to create the bdata variable.

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var bdata = BinData(0, "gf1UcxdHTJ2HQ/EGQrO7mQ==")

Insert the object into the testbin collection.

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db.testbin.insertOne( { _id : 1, bin_data: bdata } )

Query the testbin collection for the inserted document.

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db.testbin.find()

You can see the binary buffer stored in the collection.

{
  _id: 1,
  bin_data: Binary(Buffer.from("81fd547317474c9d8743f10642b3bb99", "hex"), 0)
}

Get the Length of BinData() Object

Use the BinData() constructor to create the bdata variable.

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var bdata = BinData(0, "gf1UcxdHTJ2HQ/EGQrO7mQ==")

Use .length() to return the bit length of the object.

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bdata.length()

The returned value is:

16

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