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MySQL foreign key constraints, cascade delete
I want to use foreign keys to keep the integrity and avoid orphans (I already use innoDB).
3 Answers
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C# Entity-Framework: How can I combine a .Find and .Include on a Model Object?
... Expression.Property(parameter, p.Name),
Expression.Convert(
Expression.PropertyOrField(Expression.Constant(new { id = id[i] }), "id"),
p.ClrType)))
.Aggregate(Expression.AndAlso);
return Expression.Lambda<Func<...
Should struct definitions go in .h or .c file?
...uct s { | | struct s; |
| int internal; | | |
| int other_stuff; | | extern void |
| }; | | api_func(struct s *foo, int x); |
| ...
json.dumps vs flask.jsonify
...ts headers set as "content-type: application/json", its payload set as the converted-to-JSON-string dict. dumps simply makes a converted-to-JSON-string. It's not a properly-formatted flask.Response() object. So if your view says "return json.dumps(dict)", then the recipient will just get a regular "...
Can an ASP.NET MVC controller return an Image?
...
For those that are coming into this question now, this was the solution that worked best for me.
– Clarence Klopfstein
Dec 25 '09 at 5:09
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Computed / calculated / virtual / derived columns in PostgreSQL
...he similar "computed columns" of SQL Server.
STORED generated columns are introduced with Postgres 12. Trivial example:
CREATE TABLE tbl (
int1 int
, int2 int
, product bigint GENERATED ALWAYS AS (int1 * int2) STORED
);
db<>fiddle here
VIRTUAL generated columns may come with one o...
How to split a long regular expression into multiple lines in JavaScript?
...
You could convert it to a string and create the expression by calling new RegExp():
var myRE = new RegExp (['^(([^<>()[\]\\.,;:\\s@\"]+(\\.[^<>(),[\]\\.,;:\\s@\"]+)*)',
'|(\\".+\\"))@((\\[[0-9]{1,3}...
How to change a field name in JSON using Jackson
I'm using jackson to convert an object of mine to json.
The object has 2 fields:
4 Answers
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Most efficient method to groupby on an array of objects
... })
};
});
};
group.register = function(name, converter) {
return group[name] = function(data, names) {
return _.map(group(data, names), converter);
};
};
return group;
}());
DataGrouper.register("sum", function(item) {
return _....
How can you iterate over the elements of an std::tuple?
... @ViktorSehr AFAICT it doesn't (at least on GCC 4.7.2)? Anyone with a hint?
– sehe
Apr 8 '13 at 7:55
@ViktorSehr F...