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Best way to select random rows PostgreSQL
...lass WHERE oid = 'schema_name.big'::regclass;
As long as ct isn't much smaller than id_span, the query will outperform other approaches.
WITH params AS (
SELECT 1 AS min_id -- minimum id <= current min id
, 5100000 AS id_span -- rounded up. (max_id - m...
How can I use “puts” to the console without a line break in ruby on rails?
I have a method which goes through a loop -- I want it to output a "." each loop so I can see it in the console. however, it puts a linebreak at the end of each when I use puts "." .
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What is the difference between LINQ ToDictionary and ToLookup
What is the difference between LINQ ToDictionary and ToLookup? They seem to do the same thing.
2 Answers
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increase legend font size ggplot2
...in ggplot2 ? I think I need to specify something like legend.key.width = unit(2, "line") in the theme function, but that is used to adjust the keys in legends, not the font sizes. Thanks!
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Invoke-WebRequest, POST with parameters
I'm attempting to POST to a uri, and send the parameter username=me
4 Answers
4
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How does generic lambda work in C++14?
How does generic lambda work ( auto keyword as an argument type) in C++14 standard?
3 Answers
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Can I escape a double quote in a verbatim string literal?
...foo") in C#, backslashes aren't treated as escapes, so doing \" to get a double quote doesn't work. Is there any way to get a double quote in a verbatim string literal?
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How to modify memory contents using GDB?
I know that we can use several commands to access and read memory: for example, print, p, x...
3 Answers
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Position absolute and overflow hidden
We have two DIVs, one embedded in the other. If the outer DIV is not positioned absolute then the inner DIV, which is positioned absolute, does not obey the overflow hidden of the outer DIV ( example ).
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What will happen if I modify a Python script while it's running?
Imagine a python script that will take a long time to run, what will happen if I modify it while it's running? Will the result be different?
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