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Do I need to create indexes on foreign keys on Oracle?
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edited Dec 20 '19 at 12:26
gabor
95522 gold badges1111 silver badges2020 bronze badges
ans...
Getting GDB to save a list of breakpoints
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207
As of GDB 7.2 (2011-08-23) you can now use the save breakpoints command.
save breakpoints <...
Update a dataframe in pandas while iterating row by row
...ot shown here.
update
df.set_value() has been deprecated since version 0.21.0
you can use df.at() instead:
for i, row in df.iterrows():
ifor_val = something
if <condition>:
ifor_val = something_else
df.at[i,'ifor'] = ifor_val
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Find the index of a dict within a list, by matching the dict's value
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edited Dec 27 '17 at 23:06
answered Dec 8 '10 at 20:03
to...
How can I remove a commit on GitHub? [duplicate]
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edited Jun 20 at 9:12
Community♦
111 silver badge
answered Jan 15 '09 at 23:24
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how to concatenate two dictionaries to create a new one in Python? [duplicate]
...the resulting list:
$ python -mtimeit -s'd1={1:2,3:4}; d2={5:6,7:9}; d3={10:8,13:22}' \
'd4 = dict(d1.items() + d2.items() + d3.items())'
100000 loops, best of 3: 4.93 usec per loop
Fastest: exploit the dict constructor to the hilt, then one update:
$ python -mtimeit -s'd1={1:2,3:4}; d2={5:6,7:9...
How do I merge two dictionaries in a single expression in Python (taking union of dictionaries)?
...urns None
return z
and now:
z = merge_two_dicts(x, y)
In Python 3.9.0a4 or greater (final release date approx October 2020): PEP-584, discussed here, was implemented to further simplify this:
z = x | y # NOTE: 3.9+ ONLY
Explanation
Say you have two dictionaries and you want to mer...
Should I use Vagrant or Docker for creating an isolated environment? [closed]
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10 Answers
10
Active
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Unix command to find lines common in two files
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220
The command you are seeking is comm. eg:-
comm -12 1.sorted.txt 2.sorted.txt
Here:
-1 : supp...
Is there a foreach loop in Go?
... community wiki
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