I would like to take an array and split it into a dictionary of sub-arrays based on another array of indices:
const arr = ["A", "B", "C", "D", "E"];
const indices = [0, 0, 1, 0, 3];
// Would like to do something like this:
R.split(indices, array) // { "0": ["A", "B", "D"], "1": ["C"], "3": ["E"] }
Is there an elegant way to do this in Ramda?
Use R.zip combine the arrays to an array of values/indices pairs. Group by the indices, and then take only the values from the pairs:
const { pipe, zip, groupBy, last, map, head } = R
const fn = pipe(
zip, // combine the arrays to an array of value/indice pairs
groupBy(last), // group by the indices
map(map(head)) // take only the values from the pairs
)
const arr = ["A", "B", "C", "D", "E"]
const indices = [0, 0, 1, 0, 3]
const result = fn(arr, indices)
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