18 lines
392 B
Python
18 lines
392 B
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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if function(item) :
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res = res + item
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return res
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