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Storing time-series data, relational or non?
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Create a file, name it 1_2.data. weired idea? what you get:
You save up to 50% of space because you don't need to repeat the fk_to_device and fk_to_metric value for every data point.
You save up even more space because you don't need any indices.
Save pairs of (t...
Is an array name a pointer?
...n, all the function receives is a pointer to the first element - it has no idea how big the array is (this is why the gets function was such a menace and was eventually removed from the library). For the function to know how many elements the array has, you must either use a sentinel value (such as...
How to get current path with query string using Capybara
...ted this answer to reflect modern conventions in capybara. I think this is ideal since this is the accepted answer, and what many people are being referred to when looking for a solution. With that said, the correct way to check the current path is to use the has_current_path? matcher provided by Ca...
First-time database design: am I overengineering? [closed]
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You've got the right idea. You can however clean it up, and remove some of the mapping (has*) tables.
What you can do is in the Departments table, add CityId and DivisionId.
Besides that, I think everything is fine...
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Add unique constraint to combination of two columns
...r question, and proves it. You should try it out before assuming the above ideas only treat one column or the other as opposed to the combination...
USE tempdb;
GO
CREATE TABLE dbo.Person
(
ID INT IDENTITY(1,1) PRIMARY KEY,
Name NVARCHAR(32),
Active BIT,
PersonNumber INT
);
GO
ALTER TABLE...
XPath to select multiple tags
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I have only the vaguest idea what the difference would be between these two answers and nobody has bothered to explain. What does "namespace restrictive" mean? If I use local-name(), does that mean it would match tags with any namespace? If I use se...
How do the likely/unlikely macros in the Linux kernel work and what is their benefit?
...much about portability as they only target gcc, and they have a very close idea of the assembly they want it to generate.
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Python: Tuples/dictionaries as keys, select, sort
... a data structure in Python that allows for easy selection and sorting. My idea was to put them into a dictionary with tuples as keys, e.g.,
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Cross-browser custom styling for file upload button [duplicate]
... This causes completely different behaviour in IE and chrome. Isn't the idea is to make it browser agnostic?
– kaybee99
Oct 23 '15 at 15:34
3
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A CORS POST request works from plain JavaScript, but why not with jQuery?
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Thanks for the ideas. I tried not setting dataType, and setting it to be application/x-www-form-urlencoded and even text/plain. And I tried adding a response header of Access-Control-Allow-Methods "POST, GET, OPTIONS" Nothing worked.
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