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How to clone a case class instance and change just one field in Scala?
...case class Persona(
svcName : String,
svcId : String,
sentMsgs : Set[String]
) {
def plusMsg(msg: String) = this.copy(sentMsgs = this.sentMsgs + msg)
}
then
val newPersona = existingPersona plusMsg newMsg
sha...
ASP.NET web.config: configSource vs. file attributes
...b.config -file in an ASP.NET-application some sections of config, like appSettings and connectionStrings , supports the attributes file and configSource .
...
How can I change a file's encoding with vim?
...
Notice that there is a difference between
set encoding
and
set fileencoding
In the first case, you'll change the output encoding that is shown in the terminal. In the second case, you'll change the output encoding of the file that is written.
...
What guarantees are there on the run-time complexity (Big-O) of LINQ methods?
...on is O(1) instead of O(N).
Distinct, GroupBy Join, and I believe also the set-aggregation methods (Union, Intersect and Except) use hashing, so they should be close to O(N) instead of O(N²).
Contains checks for an ICollection implementation, so it may be O(1) if the underlying collection is also O...
How to check if a table contains an element in Lua?
...
You can put the values as the table's keys. For example:
function addToSet(set, key)
set[key] = true
end
function removeFromSet(set, key)
set[key] = nil
end
function setContains(set, key)
return set[key] ~= nil
end
There's a more fully-featured example here.
...
How can I push a local Git branch to a remote with a different name easily?
...
Sure. Just set your push.default to upstream to push branches to their upstreams (which is the same that pull will pull from, defined by branch.newb.merge), rather than pushing branches to ones matching in name (which is the default set...
Set variable in jinja
I would like to know how can I set a variable with another variable in jinja. I will explain, I have got a submenu and I would like show which link is active. I tried this:
...
How to read and write INI file with Python3?
...l = config.getfloat('section_a', 'pi_val')
# update existing value
config.set('section_a', 'string_val', 'world')
# add a new section and some values
config.add_section('section_b')
config.set('section_b', 'meal_val', 'spam')
config.set('section_b', 'not_found_val', '404')
# save to a file
with o...
For loop example in MySQL
...x do
insert into foo (val) values ( floor(0 + (rand() * 65535)) );
set v_counter=v_counter+1;
end while;
commit;
end #
delimiter ;
call load_foo_test_data();
select * from foo order by id;
share
|
...
Ensuring json keys are lowercase in .NET
...tyName)
{
return propertyName.ToLower();
}
}
Usage:
var settings = new JsonSerializerSettings();
settings.ContractResolver = new LowercaseContractResolver();
var json = JsonConvert.SerializeObject(authority, Formatting.Indented, settings);
Wil result in:
{"username":"Mark","api...