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ActiveRecord.find(array_of_ids), preserving order
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The answer is for mysql only
There is a function in mysql called FIELD()
Here is how you could use it in .find():
>> ids = [100, 1, 6]
=> [100, 1, 6]
>> WordDocument.find(ids).collect(&:id)
=> [1, 6, 100]
>> WordDocument.find(ids, :order => "field(id,...
Clearing a string buffer/builder after loop
...only benefit of creating the SB outside is not losing the internal (potentially long) char[] of it. If in the first iterator it grew up enough, the second loop will not need to resize any char[]. But for getting the advantage the "clear method" will have to preserve the size of the internal array. s...
How can I quantify difference between two images?
...untered in double_scalarson line 44 (return (arr-amin)*255/rng) and a ValueError: array must not contain infs or NaNs on line 30 (z_norm = norm(diff.ravel(), 0))
– BioGeek
Aug 26 '15 at 9:47
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What is the most robust way to force a UIView to redraw?
...ouble with that, you're likely running into one of these issues:
You're calling it before you actually have the data, or your -drawRect: is over-caching something.
You're expecting the view to draw at the moment you call this method. There is intentionally no way to demand "draw right now this ver...
SLF4J: Failed to load class “org.slf4j.impl.StaticLoggerBinder”. error
The above error came after updating the m2e to version 1.1. By removing m2e 1.1 and rolling back to m2e 1.0 everything worked fine. I tried to repeat the problem in Windows and Ubuntu and it gave me the exact same error. Numerous configurations of the slf4j-api and logback were tested but none see...
Where is the Keytool application?
...cepted.
– Zoomzoom
May 12 '16 at 19:05
2
@Zoomzoom: Thought the same after ending up here. Edited...
How to delete all rows from all tables in a SQL Server database?
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Worked for me - before I was getting this error: DELETE failed because the following SET options have incorrect settings: 'QUOTED_IDENTIFIER'. Verify that SET options are correct for use with indexed views and/or indexes on computed columns and/or filtered indexes an...
Find unique rows in numpy.array
...rables such as generators is deprecated as of NumPy 1.16 and will raise an error in the future.
– leermeester
Dec 10 '19 at 8:21
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In-place type conversion of a NumPy array
...Py array of int32 , how do I convert it to float32 in place ? So basically, I would like to do
6 Answers
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Convert a Git folder to a submodule retrospectively?
...d after a while it becomes clear that some component of the project is actually useful as a standalone component (a library, perhaps). If you've had that idea from early on, then there's a fair chance that most of that code is in its own folder.
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