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What is the advantage of using forwarding references in range-based for loops?
...dvantage I can see is when the sequence iterator returns a proxy reference and you need to operate on that reference in a non-const way. For example consider:
#include <vector>
int main()
{
std::vector<bool> v(10);
for (auto& e : v)
e = true;
}
This doesn't compi...
byte + byte = int… why?
...;
So, there is no + operation on bytes, bytes are first cast to integers and the result of addition of two integers is a (32-bit) integer.
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_=> what does this underscore mean in Lambda expressions?
...nswered May 6 '10 at 4:04
ChaosPandionChaosPandion
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Why modelVersion of pom.xml is necessary and always set to 4.0.0?
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It is always set to 4.0.0 in Maven 2 and 3, because, at present, there is no other model.
Notice that modelVersion contains 4.0.0. That is currently the only supported POM version, and is always required. [source]
But it wouldn't necessarily need to always...
Golang tests in sub-directory
I want to create a package in Go with tests and examples for the package as subdirectories to keep the workspace cleaner. Is this possible and if so how?
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Update relationships when saving changes of EF4 POCO objects
Entity Framework 4, POCO objects and ASP.Net MVC2. I have a many to many relationship, lets say between BlogPost and Tag entities. This means that in my T4 generated POCO BlogPost class I have:
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How can I remove all objects but one from the workspace in R?
I have a workspace with lots of objects and I would like to remove all but one. Ideally I would like to avoid having to type rm(obj.1, obj.2... obj.n) . Is it possible to indicate remove all objects but these ones ?
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npm install vs. update - what's the difference?
What is the practical difference between npm install and npm update ? When should I use which?
5 Answers
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How to merge 2 JSON objects from 2 files using jq?
...Here we are merging two json files. Is it possible to have 1 json variable and other json file. I tried but it seems not working for me!
– Jayesh Dhandha
Apr 4 '18 at 9:25
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For each row in an R dataframe
I have a dataframe, and for each row in that dataframe I have to do some complicated lookups and append some data to a file.
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