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Merge pull request #690 from rbasso/list-ops-schema
list-ops: Make exercise schema-compliant
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‎exercises/list-ops/canonical-data.json

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{
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"#": [
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"exercise": "list-ops",
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"version": "1.0.0",
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"comments": [
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"Though there are no specifications here for dealing with large lists,",
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"implementers may add tests for handling large lists to ensure that the",
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"solutions have thought about performance concerns."
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],
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"append": {
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"description": "append entries to a list and return the new list",
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"cases": [
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{
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"description": "empty lists",
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"list1": [],
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"list2": [],
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"expected": []
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},
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{
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"description": "empty list to list",
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"list1": [],
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"list2": [1,2,3,4],
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"expected": [1,2,3,4]
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},
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{
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"description": "non-empty lists",
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"list1": [1,2],
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"list2": [2,3,4,5],
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"expected": [1,2,2,3,4,5]
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}
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]
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},
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"concat": {
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"description": "concat lists and lists of list into a new list",
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"cases": [
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{
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"description": "empty list",
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"lists": [],
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"expected": []
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},
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{
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"description": "list of lists",
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"lists": [[1,2],[3],[],[4,5,6]],
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"expected": [1,2,3,4,5,6]
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}
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]
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},
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"filter": {
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"description": "filter list returning only values that satisfy the filter function",
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"cases": [
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{
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"description": "empty list",
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"list": [],
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"function": "value modulo 2 == 1",
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"expected": []
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},
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{
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"description": "non-empty list",
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"list": [1,2,3,5],
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"function": "value modulo 2 == 1",
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"expected": [1,3,5]
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}
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]
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},
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"length": {
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"description": "returns the length of a list",
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"cases": [
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{
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"description": "empty list",
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"list": [],
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"expected": 0
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},
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{
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"description": "non-empty list",
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"list": [1,2,3,4],
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"expected": 4
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}
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]
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},
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"map": {
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"description": "return a list of elements whos values equal the list value transformed by the mapping function",
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"cases": [
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{
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"description": "empty list",
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"list": [],
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"function": "value + 1",
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"expected": []
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},
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{
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"description": "non-empty list",
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"list": [1,3,5,7],
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"function": "value + 1",
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"expected": [2,4,6,8]
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}
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]
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},
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"foldl": {
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"description": "folds (reduces) the given list from the left with a function",
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"cases": [
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{
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"description": "empty list",
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"list": [],
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"initial": 2,
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"function": "value / accumulator",
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"expected": 2
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},
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{
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"description": "division of integers",
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"list": [1,2,3,4],
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"initial": 24,
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"function": "value / accumulator",
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"expected": 64
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}
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]
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},
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"foldr": {
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"description": "folds (reduces) the given list from the right with a function",
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"cases": [
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{
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"description": "empty list",
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"list": [],
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"initial": 2,
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"function": "value / accumulator",
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"expected": 2
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},
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{
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"description": "division of integers",
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"list": [1,2,3,4],
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"initial": 24,
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"function": "value / accumulator",
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"expected": 9
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}
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]
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},
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"reverse": {
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"description": "reverse the elements of the list",
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"cases": [
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{
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"description": "empty list",
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"list": [],
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"expected": []
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},
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{
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"description": "non-empty list",
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"list": [1,3,5,7],
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"expected": [7,5,3,1]
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}
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]
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}
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"cases": [
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{
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"description": "append entries to a list and return the new list",
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"cases": [
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{
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"description": "empty lists",
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"property": "append",
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"list1": [],
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"list2": [],
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"expected": []
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},
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{
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"description": "empty list to list",
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"property": "append",
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"list1": [],
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"list2": [1, 2, 3, 4],
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"expected": [1, 2, 3, 4]
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},
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{
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"description": "non-empty lists",
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"property": "append",
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"list1": [1, 2],
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"list2": [2, 3, 4, 5],
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"expected": [1, 2, 2, 3, 4, 5]
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}
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]
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},
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{
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"description": "concat lists and lists of list into a new list",
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"cases": [
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{
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"description": "empty list",
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"property": "concat",
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"lists": [],
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"expected": []
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},
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{
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"description": "list of lists",
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"property": "concat",
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"lists": [[1, 2], [3], [], [4, 5, 6]],
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"expected": [1, 2, 3, 4, 5, 6]
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}
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]
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},
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{
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"description": "filter list returning only values that satisfy the filter function",
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"cases": [
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{
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"description": "empty list",
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"property": "filter",
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"list": [],
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"function": "value modulo 2 == 1",
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"expected": []
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},
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{
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"description": "non-empty list",
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"property": "filter",
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"list": [1, 2, 3, 5],
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"function": "value modulo 2 == 1",
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"expected": [1, 3, 5]
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}
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]
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},
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{
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"description": "returns the length of a list",
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"cases": [
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{
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"description": "empty list",
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"property": "length",
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"list": [],
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"expected": 0
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},
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{
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"description": "non-empty list",
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"property": "length",
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"list": [1, 2, 3, 4],
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"expected": 4
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}
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]
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},
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{
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"description": "return a list of elements whos values equal the list value transformed by the mapping function",
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"cases": [
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{
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"description": "empty list",
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"property": "map",
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"list": [],
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"function": "value + 1",
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"expected": []
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},
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{
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"description": "non-empty list",
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"property": "map",
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"list": [1, 3, 5, 7],
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"function": "value + 1",
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"expected": [2, 4, 6, 8]
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}
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]
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},
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{
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"description": "folds (reduces) the given list from the left with a function",
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"cases": [
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{
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"description": "empty list",
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"property": "foldl",
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"list": [],
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"initial": 2,
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"function": "value / accumulator",
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"expected": 2
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},
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{
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"description": "division of integers",
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"property": "foldl",
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"list": [1, 2, 3, 4],
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"initial": 24,
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"function": "value / accumulator",
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"expected": 64
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}
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]
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},
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{
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"description": "folds (reduces) the given list from the right with a function",
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"cases": [
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{
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"description": "empty list",
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"property": "foldr",
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"list": [],
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"initial": 2,
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"function": "value / accumulator",
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"expected": 2
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},
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{
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"description": "division of integers",
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"property": "foldr",
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"list": [1, 2, 3, 4],
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"initial": 24,
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"function": "value / accumulator",
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"expected": 9
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}
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]
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},
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{
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"description": "reverse the elements of the list",
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"cases": [
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{
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"description": "empty list",
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"property": "reverse",
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"list": [],
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"expected": []
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},
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{
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"description": "non-empty list",
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"property": "reverse",
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"list": [1, 3, 5, 7],
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"expected": [7, 5, 3, 1]
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}
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]
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}
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]
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}

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