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Why are unnamed namespaces used and what are their benefits?
...sually better to prefer static linkage, as that doesn't pollute the symbol table. It is better to write
static bool getState(/*...*/);
here. I fell into the same trap (there's wording in the standard that suggest that file-statics are somehow deprecated in favour of anonymous namespaces), but wor...
Naming convention - underscore in C++ and C# variables
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Except for teams that want their properties to be immutable.
– ChaosPandion
Jun 28 '10 at 22:34
11
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Create code first, many to many, with additional fields in association table
... not possible to create a many-to-many relationship with a customized join table. In a many-to-many relationship EF manages the join table internally and hidden. It's a table without an Entity class in your model. To work with such a join table with additional properties you will have to create actu...
How can I rename a database column in a Ruby on Rails migration?
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rename_column :table, :old_column, :new_column
You'll probably want to create a separate migration to do this. (Rename FixColumnName as you will.):
script/generate migration FixColumnName
# creates db/migrate/xxxxxxxxxx_fix_column_name....
Hide separator line on one UITableViewCell
I'm customizing a UITableView . I want to hide the line separating on the last cell ... can i do this?
37 Answers
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How to select unique records by SQL
When I perform "SELECT * FROM table" I got results like below:
8 Answers
8
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Replacing NAs with latest non-NA value
In a data.frame (or data.table), I would like to "fill forward" NAs with the closest previous non-NA value. A simple example, using vectors (instead of a data.frame ) is the following:
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Why is rbindlist “better” than rbind?
I am going through documentation of data.table and also noticed from some of the conversations over here on SO that rbindlist is supposed to be better than rbind .
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On Duplicate Key Update same as insert
...ould be no need to re-update it.
Alternatively, you can use:
INSERT INTO table (id,a,b,c,d,e,f,g)
VALUES (1,2,3,4,5,6,7,8)
ON DUPLICATE KEY
UPDATE a=a, b=b, c=c, d=d, e=e, f=f, g=g;
To get the id from LAST_INSERT_ID; you need to specify the backend app you're using for the same.
For LuaSQL...
How do I know which version of Javascript I'm using?
...ly partially, you may find 97% of ES6, 39% of ES7, kangax.github.io/compat-table/es6, and even these tables are not quite true.
– prosti
Dec 4 '16 at 21:59
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