Pipe Transformation

Installation

• npm install pipe-transformation

Development

• run gulp to watch and build changes

• npm test to run the unit tests

• gulp coverage to run the unit tests & get the code coverage

Compilation of Transformation code in Pipe

Usage

{compile-transformation-sync} = require \pipe-transformation

Functions

• compile-transformation-sync : TransformationCode :: String -> Language :: String -> [Error, (result -> Parameters -> result)]

Language can be one of "javascript", "babel" or "livescript"

• compile-transformation : TransformationCode :: String -> Language :: String -> p (result, Parameters -> result)

Context for the Transformation layer in Pipe

Usage

{summary-statistics} = require \pipe-transformation/transformation-context

Functions

• summary-statistics : [Number] -> {mean :: Number, sigma :: Number, median :: Number, length :: Number}

• parse-date : String -> Date

• round1 : NumberOfDecimalPlaces::Int -> Number -> FormattedNumber::Number

example: round1 3, 1.234567890 returns 1.235

• find-precision : Number -> Int

example: find-precision 1.2345 returns 4

• today : () -> Date

• bucketize : Number -> [Number] -> [Int]

example: (bucketize 10) [2, 12, 24, 36] returns [0, 10, 20, 40]

• fold-obj-to-list : (k -> v -> kv) -> Map k v -> [kv]

• fill-intervals-ints : [[Number ,Number]] -> Int? [[Number, Number]]

• fill-range : [[Number, Number]], Number, Number, Number, Number -> [[Number, Number]]

• fill-intervals : [[Number, Number]], Int? -> [[Number, Number]]

• to-stacked-area : (Item -> String) -> (Item -> Number) -> (Item -> Number) -> [Item] -> [{key :: String, total :: Number, values :: [[Number, Number, Item]]]

converts a list of items to a data structure than can be used for plotting a stack area chart

• from-web-socket : String -> Observer -> Subject

• date-from-object-id : ObjectId :: String -> Date

converts a mongodb object id to a javascript date object

• object-id-from-date : Date -> ObjectId :: String

converts a javascript data object to a mongodb object id

• tail-call-optimization : Function -> Function

more information: https://gist.github.com/Gozala/1697037