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What to add for the update portion in ConcurrentDictionary AddOrUpdate
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220
You need to pass a Func which returns the value to be stored in the dictionary in case of an upd...
Select multiple columns in data.table by their numeric indices
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edited Oct 29 '19 at 9:09
Henrik
52.1k1111 gold badges117117 silver badges134134 bronze badges
answer...
What is the difference between setUp() and setUpClass() in Python unittest?
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edited Feb 27 '19 at 22:06
answered May 15 '14 at 6:32
Be...
How do I check if a type is a subtype OR the type of an object?
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506
Apparently, no.
Here's the options:
Use Type.IsSubclassOf
Use Type.IsAssignableFrom
is and a...
Is there any difference between the `:key => “value”` and `key: “value”` hash notations?
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edited Dec 5 '17 at 10:10
Stefan Pochmann
23.2k66 gold badges3232 silver badges8686 bronze badges
a...
Why use 'git rm' to remove a file instead of 'rm'?
... git so I don't know the exact command. If you have come here in or after 2014, I hope this answer was useful to you.
– Eric Hepperle - CodeSlayer2010
Nov 24 '14 at 19:14
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What is the purpose of the -nodes argument in openssl?
... password?
– Flimm
Apr 12 '13 at 8:50
4
@Flimm: Protected with a password, yes. The password gen...
Position icons into circle
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2020 solution
Here's a more modern solution I use these days.
I start off by generating the HTML starting from an array of images. Whether the HTML is generated using PHP, JS, some HTML preprocessor, whatever... this matters l...
How do I convert a Ruby class name to a underscore-delimited symbol?
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how to do the reverse?
– user1406062
May 26 '13 at 8:39
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show 4 more comments
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Filtering a list based on a list of booleans
...rue, False, True, False]
>>> %timeit list(compress(list_a, fil))
100000 loops, best of 3: 2.58 us per loop
>>> %timeit [i for (i, v) in zip(list_a, fil) if v] #winner
100000 loops, best of 3: 1.98 us per loop
>>> list_a = [1, 2, 4, 6]*100
>>> fil = [True, False,...