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What is tail call optimization?
...result after the call returns. As such, the stack looks as follows:
(fact 3)
(* 3 (fact 2))
(* 3 (* 2 (fact 1)))
(* 3 (* 2 (* 1 (fact 0))))
(* 3 (* 2 (* 1 1)))
(* 3 (* 2 1))
(* 3 2)
6
In contrast, the stack trace for the tail recursive factorial looks as follows:
(fact 3)
(fact-tail 3 1)
(fact-t...
Can Vim highlight matching HTML tags like Notepad++?
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How to empty a list?
...bel with a new empty list:
del lst[:]
Here's an example:
lst1 = [1, 2, 3]
lst2 = lst1
del lst1[:]
print(lst2)
For the sake of completeness, the slice assignment has the same effect:
lst[:] = []
It can also be used to shrink a part of the list while replacing a part at the same time (but tha...
Array include any value from another array?
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NakilonNakilon
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How to create a loop in bash that is waiting for a webserver to respond?
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edited Apr 18 '14 at 15:43
Serge Stroobandt
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ans...
What is sr-only in Bootstrap 3?
... community wiki
8 revs, 6 users 73%anon
13
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How long is the SHA256 hash?
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346
A sha256 is 256 bits long -- as its name indicates.
Since sha256 returns a hexadecimal repres...
UITableView with fixed section headers
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307
The headers only remain fixed when the UITableViewStyle property of the table is set to UITabl...
Python Sets vs Lists
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236
It depends on what you are intending to do with it.
Sets are significantly faster when it come...