Binary data
The data type Binary represents raw binary data as one-dimensional arrays of unsigned bytes. Examples of data that can be represented as byte arrays are raw data from sensors, raster images and compressed data.
Byte arrays can be constructed with the function binary(Charstring hex)->Binary that converts a hexadecimal string hex to a byte array and accessed using the usual array indexing notation b[i].
For example:
set :b1 = binary('010245FF')
:b1[2]
You can also convert a vector to a byte array with the function binary(Vector of Integer)->Binary:
set :b2 = binary([0,1,255,48,35])
General queries over binary arrays can be specified. For example:
select i, :b1[i] from Integer i
select i,:b1[i]+1 from Integer i where i>2
You can update byte arrays with the function setf(Binary b, Integer i, Integer v)->Integer:
setf(:b1, 2, 3)
You can use the in() function and operator to obtain the elements of a byte array:
in(:b1);
The hexadecimal string representation of byte arrays and integers can be obtained with the function hex():
hex(:b1);
hex(binary(1234))