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initialize a vector to zeros C++/C++11
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Initializing a vector having struct, class or Union can be done this way
std::vector<SomeStruct> someStructVect(length);
memset(someStructVect.data(), 0, sizeof(SomeStruct)*length);
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How to change the order of DataFrame columns?
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@FooBar That's not a set union it's a concatenation of two ordered lists.
– Aman
Oct 6 '16 at 22:08
3
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How to change position of Toast in Android?
...ited Sep 12 '17 at 10:27
Gorgon_Union
48522 gold badges88 silver badges1616 bronze badges
answered Jul 25 '17 at 16:56
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Disable all table constraints in Oracle
... OR child.child_tname LIKE 'V2_%'))
SELECT DISTINCT disable_pk
FROM qry0
UNION
SELECT DISTINCT disable_fk
FROM qry0;
works like a charm
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fo...
How do I set bold and italic on UILabel of iPhone/iPad?
....fontDescriptor.withSymbolicTraits(UIFontDescriptor.SymbolicTraits(traits).union(self.fontDescriptor.symbolicTraits)) else {
return self
}
return UIFont(descriptor: descriptor, size: 0)
}
func without(_ traits: UIFontDescriptor.SymbolicTraits...) -> UIFont {
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MySQL - SELECT WHERE field IN (subquery) - Extremely slow why?
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I wonder why the optimizer considers queries with unions correlated... Anyway, this trick worked like magic
– Brian Leishman
Oct 26 '17 at 16:00
2
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sql primary key and index
...ed in PRIMARY KEY, but allowed in UNIQUE index; and like in set operators (UNION, EXCEPT, INTERSECT), here NULL = NULL which means that you can have only one value as two NULLs are find as duplicates of each other;
only one PRIMARY KEY may exists per table while 999 unique indexes can be created
whe...
Is there any pythonic way to combine two dicts (adding values for keys that appear in both)?
...':4, 'd':5}
>>> c = {x: A.get(x, 0) + B.get(x, 0) for x in set(A).union(B)}
>>> print(c)
{'a': 1, 'c': 7, 'b': 5, 'd': 5}
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Python “extend” for a dictionary
...'a': 1, 'b': 2, 'c': 3, 'd': 4}
In Python 3.9 you can add two dict using union | operator
# use the merging operator |
c = a | b
# c = {'a': 1, 'b': 2, 'c': 3, 'd': 4}
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Why are Docker container images so large?
... gets committed, or else deletes don't actually remove data. That is, in a union/copy-on-write file system, cleaning at the end doesn't really reduce file system usage because the real data is already committed to lower layers. To get around this you must clean at each layer.
$ docker history bf526...