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What does .SD stand for in data.table in R
...
100
Edit:
Given how well-received this answer was, I've converted it into a package vignette now ...
Memcached vs. Redis? [closed]
...an it has to and will give you back memory it is no longer using.
I stored 100,000 ~2KB strings (~200MB) of random sentences into both. Memcached RAM usage grew to ~225MB. Redis RAM usage grew to ~228MB. After flushing both, redis dropped to ~29MB and memcached stayed at ~225MB. They are similarly e...
What does multicore assembly language look like?
... of the first instruction that the processor will execute as:
CS = XX * 0x100
IP = 0
Remember that CS multiples addresses by 0x10, so the actual memory address of the first instruction is:
XX * 0x1000
So if for example XX == 1, the processor will start at 0x1000.
We must then ensure that ther...
JavaScript + Unicode regexes
...C0-\u0EC4\u0EC6\u0EDC-\u0EDF\u0F00\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081\u108E\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u1...
Schema for a multilanguage database
...L field in the database.
e.g
-- CREATE TABLE MyTable(myfilename nvarchar(100) NULL, filemeta xml NULL )
;WITH CTE AS
(
-- INSERT INTO MyTable(myfilename, filemeta)
SELECT
'test.mp3' AS myfilename
--,CONVERT(XML, N'<?xml version="1.0" encoding="utf-16" ...
Fastest way to iterate over all the chars in a String
...r words, the tests are done in random order every time they are done, over 1000 times over.
The entire test suite is done forwards, and backwards, to show the effect of JVM warmup on optimization and times.
The entire suite is done twice, once in -client mode and the other in -server mode.
CONCL...
Database development mistakes made by application developers [closed]
...
1002
votes
1. Not using appropriate indices
This is a relatively easy one but still ...
The case against checked exceptions
... And for the lazy programmer reason, well, I think as a programmer you are 100% responsible of your code.
– Mister Smith
Aug 23 '11 at 6:22
3
...
What is a monad?
...
+100
Actually, contrary to common understanding of Monads, they have nothing to do with state. Monads are simply a way to wrapping things...
Callback functions in C++
...
tranform_every_int(&a[0], 5, square_int);
// now a == {4, 16, 36, 64, 100};
2. Pointer to member function
A pointer to member function (of some class C) is a special type of (and even more complex) function pointer which requires an object of type C to operate on.
struct C
{
int y;
...