46 lines
908 B
Python
46 lines
908 B
Python
def append(list1, list2):
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result = []
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for x in list1:
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result = result + [x]
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for x in list2:
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result = result + [x]
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return append
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def concat(lists):
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result = []
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for list in lists:
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append(result, list)
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return result
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def filter(function, list):
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result = []
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for x in list:
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if function(x):
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result = result + [x]
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return result
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def length(list):
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lng = 0
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for i in list:
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lng += 1
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return lng
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def map(function, list):
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result = []
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for x in list:
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if function(x) not in result:
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result = result + [x]
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return result
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def foldl(function, list, initial):
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acc = initial
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for x in list:
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acc = function(acc, x)
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return acc
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def foldr(function, list, initial):
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return foldl(function, reverse(list), initial)
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def reverse(list):
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result = list[::-1]
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return result |