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Tricks to manage the available memory in an R session
...
I make aggressive use of the subset parameter with selection of only the required variables when passing dataframes to the data= argument of regression functions. It does result in some errors if I forget to add variables to both the formula and the select= vector, but it sti...
Update multiple rows in same query using PostgreSQL
...;
-- populate table with dummy rows
insert into results_dummy
(id, status)
select unnest(array[1,2,3,4,5]::int[]) as id, unnest(array['a','b','c','d','e']::text[]) as status;
select * from results_dummy;
-- THE update of multiple rows with/by different values
update results_dummy as rd
set stat...
Jump to function definition in vim
... mentioned you have to use ctags.
You could also consider using plugins to select appropriate one or to preview the definition of the function under cursor.
Without plugins you will have a headache trying to select one of the hundreds overloaded 'doAction' methods as built in ctags support doesn't ...
Why is an int in OCaml only 31 bits?
...space and a number of special objects like true, false, nil, the 127 ASCII characters, some commonly used short strings, the empty list, the empty object, the empty array and so on near the 0 address.
For example, in the MRI, YARV and Rubinius Ruby interpreters, integers are encoded the way I descr...
How do you force Visual Studio to regenerate the .designer files for aspx/ascx files?
... Designer.cs file BY RIGHT CLICKING the aspx file in Solution Explorer and selecting delete. This worked for me in VS 2010.
– DeveloperDan
May 16 '12 at 21:02
...
Detect application heap size in Android
... an Android version such as CyanogenMod, which allows the user to manually select how large a heap size should be allowed for each app. In CM, for example, this option appears under "CyanogenMod settings" / "Performance" / "VM heap size".
NOTE: BE AWARE THAT SETTING THIS VALUE MANUALLY CAN MESS U...
Making the Android emulator run faster
...ve to properly shut down your emulator device (hold the power button, then select Power off) to avoid having errors when you start it the next time (I could just close the ARM emulator, but with the Intel emulator, just closing seems to create problems).
– ADTC
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How to edit incorrect commit message in Mercurial? [duplicate]
...-amend option.
and in tortoiseHg, you can use "Amend current revision" by select black arrow on the right of commit button
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How do I delete multiple rows in Entity Framework (without foreach)
...Expression<Func<T, bool>> filter) where T : class
{
string selectSql = db.Set<T>().Where(filter).ToString();
string fromWhere = selectSql.Substring(selectSql.IndexOf("FROM"));
string deleteSql = "DELETE [Extent1] " + fromWhere;
db.Database.ExecuteSqlCommand(deleteSq...
How do I use CREATE OR REPLACE?
... replace procedure NG_DROP_TABLE(tableName varchar2)
is
c int;
begin
select count(*) into c from user_tables where table_name = upper(tableName);
if c = 1 then
execute immediate 'drop table '||tableName;
end if;
end;
...