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Most lightweight way to create a random string and a random hexadecimal number
....165037870407104
9.0292739868164062
5.2836320400238037
t3 only makes one call to the random module, doesn't have to build or read a list, and then does the rest with string formatting.
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What is the difference between async.waterfall and async.series
...n to the next function, while async.series passes all results to the final callback. At a higher level, async.waterfall would be for a data pipeline ("given 2, multiply it by 3, add 2, and divide by 17"), while async.series would be for discrete tasks that must be performed in order, but are otherwi...
Correct way to pass multiple values for same parameter name in GET request
...ost applications use the first option you have shown: http://server/action?id=a&id=b. To support that information, take a look at this Stackoverflow link, and this MSDN link regarding ASP.NET applications, which use the same standard for parameters with multiple values.
However, since you are d...
Passing multiple error classes to ruby's rescue clause in a DRY fashion
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@Andy It's called splat. It usually has the effect of decomposing an array into comma separated objects. When used in the argument receiving position of a method definition, it does the other way: put the arguments together into an arra...
In Visual Studio C++, what are the memory allocation representations?
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@AndersonGreen Of course it's intentional. It's called hexspeak.
– user142019
May 9 '13 at 14:20
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How do I select an entire row which has the largest ID in the table?
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You could use a subselect:
SELECT row
FROM table
WHERE id=(
SELECT max(id) FROM table
)
Note that if the value of max(id) is not unique, multiple rows are returned.
If you only want one such row, use @MichaelMior's answer,
SELECT row from table ORDER BY id DESC LIMIT...
Checking out Git tag leads to “detached HEAD state”
...ipt for my git project and I just started using tags. I've added a new tag called v2.0 :
2 Answers
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NSDefaultRunLoopMode vs NSRunLoopCommonModes
...p mode, rather than the specific default run loop. The special pseudo-mode called NSRunLoopCommonModes is used by many input sources including event tracking. For example assigning NSURLConnection's instance to the common mode means associates its events to "tracking mode" in addition to the "defaul...
PostgreSQL DISTINCT ON with different ORDER BY
...expression(s).
Official documentation
So you'll have to add the address_id to the order by.
Alternatively, if you're looking for the full row that contains the most recent purchased product for each address_id and that result sorted by purchased_at then you're trying to solve a greatest N per gr...
Joining three tables using MySQL
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Simply use:
select s.name "Student", c.name "Course"
from student s, bridge b, course c
where b.sid = s.sid and b.cid = c.cid
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