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How to add dividers and spaces between items in RecyclerView?
...ve a complete solution, so I tried to do a short, up-to-date wrap-up.
Unlike ListView, the RecyclerView class has no divider-related parameters. Instead, you need to extend ItemDecoration, a RecyclerView's inner class:
An ItemDecoration allows the application to add a special drawing and layout of...
How do I iterate through each element in an n-dimensional matrix in MATLAB?
...very element in an n-dimensional matrix in MATLAB. The problem is, I don't know how to do this for an arbitrary number of dimensions. I know I can say
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Using boolean values in C
... int bool;
#define true 1
#define false 0
Explanation
Option 1 will work only if you use C99 and it's the "standard way" to do it. Choose this if possible.
Options 2, 3 and 4 will have in practice the same identical behavior. #2 and #3 don't use #defines though, which in my opinion is better.
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Use of ~ (tilde) in R programming Language
...f the ~ are the explanatory variables. So in English you'd say something like "Species depends on Sepal Length, Sepal Width, Petal Length and Petal Width".
The myFormula <- part of that line stores the formula in an object called myFormula so you can use it in other parts of your R code.
Othe...
Why should I not include cpp files and instead use a header?
... assignment and received my grade. But according to the grading, I lost marks for including cpp files instead of compiling and linking them . I'm not too clear on what that means.
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Is errno thread-safe?
...le is declared as extern int errno; so my question is, is it safe to check errno value after some calls or use perror() in multi-threaded code. Is this a thread safe variable? If not, then whats the alternative ?
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Increasing client_max_body_size in Nginx conf on AWS Elastic Beanstalk
...n posting files larger than 10MB to our API running on AWS Elastic Beanstalk.
17 Answers
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Postgres unique constraint vs index
...------
con_id | integer |
ind_id | integer |
Indexes:
"master_con_id_key" UNIQUE CONSTRAINT, btree (con_id)
"master_unique_idx" UNIQUE, btree (ind_id)
In table description (\d in psql) you can tell unique constraint from unique index.
Uniqueness
Let's check uniqueness, just in case.
t...
Storing C++ template function definitions in a .CPP file
...ld prefer to have stored in a CPP file instead of inline in the header. I know this can be done as long as you know which template types will be used. For example:
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Best way to work with transactions in MS SQL Server Management Studio
...example,
Begin Transaction
-Do some T-SQL queries here.
Rollback transaction -- OR commit transaction
If you want to incorporate error handling you can do so by using a TRY...CATCH BLOCK. Should an error occur you can then rollback the tranasction within the catch block.
For example:
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