zip clear solution for Create Intervals by David_Jones - python coding challenges

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zip solution in Clear category for Create Intervals by David_Jones

def create_intervals(data):
    begins, ends = [], []
    for x in data:
        if x-1 not in data:
            begins.append(x)
        if x+1 not in data:
            ends.append(x)
    return list(zip(sorted(begins), sorted(ends)))

May 14, 2019

Comments:

maxnrg on Dec. 22, 2019, 9:33 a.m.
<p>very nice solution with begins and ends!</p>

maxnrg on Dec. 22, 2019, 9:46 a.m.
<p>a little optimization - one sorted() instead of two: ``` def create_intervals(data: Set[int]) -> List[Tuple[int, int]]: """ Create a list of intervals out of set of ints. """ begins = [] ends = [] for element in data: if element - 1 not in data: begins.append(element) if element + 1 not in data: ends.append(element) return sorted(zip(begins, ends))</p>

maxnrg on Dec. 22, 2019, 10:08 a.m.
<p>also, we can use comprehensions: ```</p> <h1>v3 - <pre class='brush: python'>starts</pre> and <pre class='brush: python'>ends</pre> iterators</h1> <p>def create_intervals(data: Set[int]) -> List[Tuple[int, int]]: """ Create a list of intervals out of set of ints. """ starts = (element for element in data if element - 1 not in data) ends = (element for element in data if element + 1 not in data) return sorted(zip(starts, ends)) <pre class='brush: python'> or </pre></p> <h1>v4 - <pre class='brush: python'>starts</pre> and <pre class='brush: python'>ends</pre> iterators two-liner</h1> <p>def create_intervals(data: Set[int]) -> List[Tuple[int, int]]: """ Create a list of intervals out of set of ints. """ return sorted(zip((element for element in data if element - 1 not in data), (element for element in data if element + 1 not in data)))</p>

David_Jones on Dec. 22, 2019, 11:48 a.m.
<p>Nice. True pythonic way.</p>

Different kind of sets

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