Package 'learnrhash'

Decode hashed text into an R object

Description

Decode hashed text into an R object

Usage

decode_obj(txt, compress = c("bzip2", "gzip", "xz", "none"))

Arguments

txt	Hashed text.
compress	Compression method.

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Encode an R object into hashed text

Description

Encode an R object into hashed text

Usage

encode_obj(obj, compress = c("bzip2", "gzip", "xz", "none"))

Arguments

obj	R object
compress	Compression method.

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Extract hash contents

Description

The following are helper functions for extracting data from hashed learnr solutions.

• extract_hash - extracts the contents of the hashes into label, type, answer, correct, and timestamp columns

• extract_questions - extracts the contents of the hashes for answered questions.

• extract_exercises - extracts the contents of the hashes for answered exercises.

Usage

extract_hash(df, hash = "hash")

extract_exercises(df, hash = "hash")

extract_questions(df, hash = "hash")

Arguments

df	Data Frame. A data frame containing hash in a character column.
hash	Character. The name of the column containing the hashes

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Learnr addon elements

Description

The following are addon element for learnr tutorials that enable the encoding and decoding of hashed learnr solutions.

Note that when including these functions in a learnr Rmd document it is necessary that the logic functions, ⁠*_logic()⁠, be included in an R chunk where context="server" as they interact with the underlying Shiny functionality. Conversely, any of the ui functions, ⁠*_ui()⁠, must not be included in an R chunk with a context. Both types of functions have been written to provide useful feedback if they detect they are in the wrong R chunk type.

Usage

decoder_logic()

decoder_ui()

encoder_logic(strip_output = FALSE)

default_ui(url = "http://google.com")

iframe_ui(src = "http://google.com", ...)

encoder_ui(ui_before = default_ui(), ui_after = NULL)

Arguments

strip_output	Exercises save their output as html, for exercises that result in plots these can result in very large hashes. The option allows this information to be removed to keep hash sizes more manageable.
url	Link url to use.
src	Source of the iframe.
...	Other iframe attributes, e.g. height and width
ui_before	Shiny ui elements to include before the hash ui
ui_after	Shiny ui elements to include after the hash ui,

Details

For either of the ui parameters you can wrap multiple shiny elements together with shiny::div.

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