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Choosing between std::map and std::unordered_map [duplicate]
Now that std has a real hash map in unordered_map , why (or when) would I still want to use the good old map over unordered_map on systems where it actually exists? Are there any obvious situations that I cannot immediately see?
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how to return index of a sorted list? [duplicate]
...rt a list of objects based on a property of the objects. i then need to re-order a corresponding list to match the order of the newly sorted list."
That's a long-winded way of doing it. You can achieve that with a single sort by zipping both lists together then sort using the object property as y...
Nodejs Event Loop
...imilar problem like you when I tried to understand node.js architecture in order to write native modules.
What I am posting here is my understanding of node.js and this might be a bit off track as well.
Libev is the event loop which actually runs internally in node.js to perform simple event loop...
Select row with most recent date per user
...e t2
WHERE t2.user = t1.user
ORDER BY t2.id DESC
LIMIT 1)
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Get an array of list element contents in jQuery
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Does jQuery guarantee an order to the elements returned by the query? I would assume that the order returned is the same as the ordering in the DOM (ie text1, text2, text3), but I don't know what to look for in the documentation to see if this is tru...
How can I get the max (or min) value in a vector?
...1, 2, 3, -1, -2, -3};
If the vector is sorted in ascending or descending order then you can find it with complexity O(1).
For a vector of ascending order the first element is the smallest element, you can get it by v[0] (0 based indexing) and last element is the largest element, you can get it b...
Callback after all asynchronous forEach callbacks are completed
...ue of the index parameter does not provide the same guarantee, because the order of return of the asynchronous operations is not guaranteed.
Using ES6 Promises
(a promise library can be used for older browsers):
Process all requests guaranteeing synchronous execution (e.g. 1 then 2 then 3)
func...
ExpressJS How to structure an application?
...don't need it. It is in lots of boilerplate due to mindless copypasta.
THE ORDER OF MIDDLEWARE AND ROUTES IN EXPRESS MATTERS!!!
Almost every routing problem I see on stackoverflow is out-of-order express middleware
In general, you want your routes decoupled and not relying on order that much
Don't...
Do I need to explicitly call the base virtual destructor?
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No, destructors are called automatically in the reverse order of construction. (Base classes last). Do not call base class destructors.
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Data Modeling with Kafka? Topics and Partitions
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@RavindranathAkila Kafka is designed to have of the order of few thousands of partitions roughly less than 10,000. And the main bottleneck is zookeeper. A better way to design such a system is to have fewer partitions and use keyed messages to distribute the data over a fixed ...