44 lines
1.0 KiB
Python
44 lines
1.0 KiB
Python
def append(list1, list2):
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result = []
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for item in list1 :
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result = result + [item]
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for item in list2 :
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result = 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 item in lists:
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result = append(result, item)
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return result
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def filter(function, list):
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res = []
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for item in list:
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if function(item) :
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res = res + [item]
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return res
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def length(list) :
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counter = 0
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for item in list:
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counter = counter + 1
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return counter
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def map(function, list) :
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res = []
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for item in list:
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res = res + [function(item)]
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return res
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def foldl(function, list, initial):
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final = initial
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for item in list:
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final = function(final, item)
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return final
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def foldr(function, list, initial):
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final = initial
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for item in reverse(list):
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final = function(final, item)
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return final
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def reverse(list):
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result = []
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for item in list:
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result = [item] + result
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return result |