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Update 11_selection.md #29

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16 changes: 10 additions & 6 deletions prose/11_selection.md
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Original file line number Diff line number Diff line change
Expand Up @@ -24,12 +24,16 @@ If our goal is to find the second largest item in a list, we could do this in li

```python
def secondsmallest(L):
a, b = None, None
for item in L:
if a is None or item <= b:
a, b = item, a
elif b is None or item <= a:
b = item
if len(L) < 2:
return None
a, b = L[0], L[1]
if a > b:
a, b = b, a
for i in range(2, len(L)):
if L[i] <= a:
a, b = L[i], a
elif L[i] < b:
b = L[i]
return b
```

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