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How to deep copy a list?
...], [4, 5, 6]]
>>> b
[[1, 2, 3], [4, 5, 6]]
>>> a[0][1] = 10
>>> a
[[1, 10, 3], [4, 5, 6]]
>>> b # b changes too -> Not a deepcopy.
[[1, 10, 3], [4, 5, 6]]
Now see the deepcopy operation
>>> import copy
>>> b = copy.deepcopy(a)
>>>...
Git: how to reverse-merge a commit?
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106
To create a new commit that 'undoes' the changes of a past commit, use:
$ git revert <comm...
not None test in Python [duplicate]
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1033
if val is not None:
# ...
is the Pythonic idiom for testing that a variable is not set ...
Convert columns to string in Pandas
...liseconds since epoch.
– Sussch
Jul 10 '19 at 5:41
1
@Sussch I suspect that's because json doesn'...
How do I automatically update a timestamp in PostgreSQL
...ULT value:
CREATE TABLE users (
id serial not null,
firstname varchar(100),
middlename varchar(100),
lastname varchar(100),
email varchar(200),
timestamp timestamp default current_timestamp
)
Note that the value for that column can explicitly be overwritten by supplying a value in the...
Is it a bad practice to use an if-statement without curly braces? [closed]
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answered Jan 23 '10 at 23:02
cleeclee
10.1k66 gold badges3333 silver badges2727 bronze badges
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Is MD5 still good enough to uniquely identify files?
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edited Oct 27 '10 at 10:40
answered Oct 27 '10 at 10:33
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Split a string at uppercase letters
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edited Feb 17 '10 at 0:22
answered Feb 17 '10 at 0:04
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Remove CSS class from element with JavaScript (no jQuery) [duplicate]
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answered Jan 28 '10 at 16:29
Paul RougetPaul Rouget
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Difference between jQuery `click`, `bind`, `live`, `delegate`, `trigger` and `on` functions (with an
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edited May 23 '17 at 10:30
Community♦
111 silver badge
answered Jun 2 '10 at 4:09
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