57 lines
990 B
Python
57 lines
990 B
Python
def append(list1, list2):
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result = []
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for item in list1:
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result += [item]
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for item in list2:
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result += [item]
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return result
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def concat(lists):
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result = []
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for sublist in lists:
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result = append(result, sublist)
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return result
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def filter(function, lst):
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result = []
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for item in lst:
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if function(item):
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result += [item]
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return result
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def length(lst):
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result = 0
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for _ in lst:
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result += 1
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return result
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def map(function, lst):
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result = []
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for item in lst:
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result += [function(item)]
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return result
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def foldl(function, lst, initial):
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acc = initial
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for item in lst:
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acc = function(acc, item)
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return acc
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def reverse(lst):
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result = []
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for item in lst:
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result = [item] + result
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return result
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def foldr(function, lst, initial):
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acc = initial
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for item in reverse(lst):
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acc = function(acc, item)
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return acc |