Questions tagged [ragged-list]
A ragged list, also called a jagged list, is a list where each element can either be some terminal type (e.g. an integer) or another ragged list.
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Search the deepest depths of an array
Given a ragged array, find the length of the largest subarray that contains the depth of that subarray. The base array layer has a depth of 0.
Here is an example:
...
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Multiply multivariate polynomials
We already have a challenge about multiplying multiply single-variable polynomials. This challenge is about multiply two polynomials with multiple variables
Your task is given two multi-variable ...
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Gödel encoding - Part II (decoding)
Part I
Previous part was considered encoding of non-empty nested lists with a positive integer.
Reminding the coding procedure \$G(x)\$:
If \$x\$ is a number, \$G(x) = 2^x\$
If \$x\$ is a list \$[n_0,...
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Gödel encoding - Part I
Related but different.
Part II
Taken from the book: Marvin Minsky 1967 – Computation:
Finite and Infinite Machines, chapter 14.
Background
As the Gödel proved, it is possible to encode with a unique ...
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Ragged list pattern matching, Part 2
This is a sequel to Ragged list pattern matching. In this challenge, the wildcard may match a sequence of items of any length instead of just a single item.
Given a pattern and a ragged list of ...
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Zip ragged lists
In Haskell (and probably some other languages or something) zip is a function which takes two lists, and produces a list of tuples by pairing elements at the same ...
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Re-name all identifiers to a single letter
Imagine a very simple language. It has just 2 syntax features: () indicates a block scope, and any word consisting only of 1 or more lower case ASCII letters, which ...
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Is it a properly tiered list?
A ragged list is a (finite depth) list where each element is either a positive integer or a ragged list.
A ragged list is properly tiered if it contains either all positive integers or all properly ...
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Multiply numbers by their depth
Given a ragged list, we can define an element's depth as the number of arrays above it, or the amount that it is nested.
For example, with the list ...
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Is it an ordinal?
Background (feel free to skip)
Ordinals are the abstract representation of well-orders. A well-order of a set is a total order, which basically means that every element in the set can be compared ...
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Is it a valid list?
Given a string like [[[],[[]]],[]], made of only commas and square brackets, your challenge is to determine whether it represents a list.
A list is either:
...
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Iteratively delete a list
Say I have a ragged list, like:
[
[1, 2],
[3,
[4, 5]
]
]
And I want to iterate over each item and delete it one-by-one. However, I don't know the ...
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Make a list flat
Lists can contain lists and we have nested lists. But we don't like nested lists and want to flatten them. By flattening I mean create a list which does not contain any list, but elements of lists it ...
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Find the dimensions of a ragged list
For any ragged list its dimensions will be a list of non-negative integers defined as follows:
Elements that are not a list will have dimensions \$\textbf{[}\,\,\textbf{]}\$.
An empty list has ...
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Ragged list pattern matching
Given a pattern and a ragged list of positive integers, your task is to decide whether the pattern matches the ragged list.
The pattern is also represented by a ragged list. But in addition to ...
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