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How do I merge two dictionaries in a single expression in Python (taking union of dictionaries)?
...le expression that returns these two dictionaries, merged (i.e. taking the union). The update() method would be what I need, if it returned its result instead of modifying a dictionary in-place.
...
Is gcc's __attribute__((packed)) / #pragma pack unsafe?
...option, enabled by default.
When address of packed member of struct or union is taken, it may
result in an unaligned pointer value. This patch adds
-Waddress-of-packed-member to check alignment at pointer assignment and warn unaligned address as well as unaligned pointer
I've just built t...
SELECT * FROM X WHERE id IN (…) with Dapper ORM
...
connection.Query<int>(
@"select *
from (select 1 as Id union all select 2 union all select 3) as X
where Id in @Ids",
new { Ids = new int[] { 1, 2, 3 });
Will be translated to:
select *
from (select 1 as Id union all select 2 union all select 3) as X
where Id in ...
T-SQL: Opposite to string concatenation - how to split string into multiple records [duplicate]
... Pieces(pn, start, stop) AS (
SELECT 1, 1, CHARINDEX(@sep, @s)
UNION ALL
SELECT pn + 1, stop + 1, CHARINDEX(@sep, @s, stop + 1)
FROM Pieces
WHERE stop > 0
)
SELECT pn,
SUBSTRING(@s, start, CASE WHEN stop > 0 THEN stop-start ELSE 512 END) AS s
FRO...
MySQL “WITH” clause
...n Subquery please? could I have select * from ( (select * from table1) UNION ALL (select * from table2) ) Group By something?
– user677607
Jun 5 '12 at 20:54
1
...
Difference between 'struct' and 'typedef struct' in C++?
...different categories of identifiers, including tag identifiers (for struct/union/enum) and ordinary identifiers (for typedef and other identifiers).
If you just said:
struct Foo { ... };
Foo x;
you would get a compiler error, because Foo is only defined in the tag namespace.
You'd have to dec...
Insert multiple rows WITHOUT repeating the “INSERT INTO …” part of the statement?
...
INSERT INTO dbo.MyTable (ID, Name)
SELECT 123, 'Timmy'
UNION ALL
SELECT 124, 'Jonny'
UNION ALL
SELECT 125, 'Sally'
For SQL Server 2008, can do it in one VALUES clause exactly as per the statement in your question (you just need to add a comma to separate each values statement)....
How do I check if there are duplicates in a flat list?
...6]), set([2, 3]))
"""
return reduce(
lambda (u, d), o : (u.union([o]), d.union(u.intersection([o]))),
a_list,
(set(), set()))
if __name__ == "__main__":
import doctest
doctest.testmod()
From there you can test unicity by checking whether the second element ...
Inserting multiple rows in a single SQL query? [duplicate]
... Only SQLite 3.7.11 onwards. If you cannot guarantee that, use the UNION method shown here: stackoverflow.com/a/5009740/841830
– Darren Cook
Feb 13 '14 at 1:12
3
...
Tricky Google interview question
...
let's just call this "merge" function union instead, as it is removing the duplicates. merge, as a part of mergesort, must preserve duplicates coming from both its input sequences. See Data.List.Ordered package for related stuff.
– Will Ness...