Function to be used to specify the file where key-value pairs get stored for local disk connections, useful when keys are arbitrary objects. File names are determined using a md5 hash of the object. This is the default argument for
keys to be hashed
a "localDiskConn" object
You shouldn't need to call this directly other than to experiment with what the output looks like or to get ideas on how to write your own custom hash.
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# connect to empty localDisk directory path <- file.path(tempdir(), "irisSplit") unlink(path, recursive = TRUE) conn <- localDiskConn(path, autoYes = TRUE, fileHashFn = digestFileHash) # add some data addData(conn, list(list("key1", iris[1:10,]))) addData(conn, list(list("key2", iris[11:110,]))) addData(conn, list(list("key3", iris[111:150,]))) # see that files were stored by their key list.files(path)
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