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What is the copy-and-swap idiom?
...s we are rid of the need for a self-assignment check, allowing a single uniform implementation of operator=. (Additionally, we no longer have a performance penalty on non-self-assignments.)
And that is the copy-and-swap idiom.
What about C++11?
The next version of C++, C++11, makes one very impor...
What is the difference between bottom-up and top-down?
...have no idea what the optimal evaluation order is. Typically, you would perform a recursive call (or some iterative equivalent) from the root, and either hope you will get close to the optimal evaluation order, or obtain a proof that you will help you arrive at the optimal evaluation order. You woul...
Logical operators for boolean indexing in Pandas
...u want element-wise logical-and. That is what the & binary operator performs:
(a['x']==1) & (a['y']==10)
returns a boolean array.
By the way, as alexpmil notes,
the parentheses are mandatory since & has a higher operator precedence than ==.
Without the parentheses, a['x']==1 &...
What is the best way to auto-generate INSERT statements for a SQL Server table?
...inserts 'titles', @include_timestamp = 1
Example 6: To print the debug information:
EXEC sp_generate_inserts 'titles', @debug_mode = 1
Example 7: If you are not the owner of the table, use @owner parameter to specify the owner name
To use this option, you must have SELECT permis...
insert vs emplace vs operator[] in c++ map
...variants like using value_type or make_pair . While there is a lot of information about all of them and questions about particular cases, I still can't understand the big picture.
So, my two questions are:
...
ExpressJS How to structure an application?
...ng, but ultimately the github repo will be the up-to-date place for this information.
Express Code Structure
This project is an example of how to organize a medium-sized express.js web application.
Current to at least express v4.14 December 2016
How big is your application?
Web applicatio...
A monad is just a monoid in the category of endofunctors, what's the problem?
...y in which the objects are endofunctors and the morphisms are natural transformations.
And of those endofunctors, some of them might be monads. Which ones are monads? Exactly the ones which are monoidal in a particular sense. Instead of spelling out the exact mapping from monads to monoids (since Ma...
Refresh image with a new one at the same url
...o get access to the file-last-modified time. Also, requires server-side information, so not suitable for a purely client-side-only solution to check for a refreshed image.
When to use: When you want to cache images, but may need to update them at the server end from time to time without changing ...
What's the difference between passing by reference vs. passing by value?
...st exclusively pass-by-value. Pass-by-reference is now chiefly used in the form of "output/inout arguments" in languages where a function cannot return more than one value.
The meaning of "reference" in "pass by reference". The difference with the general "reference" term is is that this "reference...
What are the real-world strengths and weaknesses of the many frameworks based on backbone.js? [close
...han 5 years working in thick-client, distributed software systems using WinForms and C#. I built apps for desktop, laptop (smart-client), mobile devices and web applications, all sharing a core functional set and working with the same server back-end many times. In this time, I learned the value of ...