cascalog.in-memory.tuple — cascalog/cascalog-core 3.0.0

Tuples encapsulate the data that Cascalog queries. An individual tuple contains a field name and a value. It is represented as a map. So tuples are just a sequence of maps, and an example is: [{'?num' 1} {'?num' 2}].

cross-join clj

(cross-join coll-of-tuples)

Input a collection of a collection of tuples like [[{:b 2}] [{:a 1} {:a 3}] And you'll get a result like: [{:a 1 :b 2} {:a 3 :b 2}]

empty-tuple clj

(empty-tuple fields)

Creates a tuple with a nil value for all of the fields

map-select-values clj

(map-select-values fields tuples)

Creates a collection of vectors for the values of the fields you have selected

project clj

(project tuples fields)

(project tuples input-fields output-fields)

select-values clj

(select-values fields tuple)

Creates a list of the values of the tuples you want and if the field isn't found, its value is the name of the field. For examples: (select-values [:b :a 100] {:a 1 :b 2 :c 3}) => (2 1 100)

sort clj

(sort tuples sort-fields reverse?)

to-tuple clj

(to-tuple names v)

to-tuples clj

(to-tuples names coll-of-seqs)

turns ["n"] and [[1] [2]] into [{"n" 1} {"n" 2}]

to-tuples-filter-nullable clj

(to-tuples-filter-nullable names coll-of-seqs)

Turns ["n"] and [[1] [2]] into [{"n" 1} {"n" 2}]

valid? clj

(valid? tuple)

Verifies that non-nullable vars aren't null.