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Why were pandas merges in python faster than data.table merges in R in 2012?
...ython package Pandas). Matching 1 million strings of which
of which 600,000 are unique is now reduced from 16s to 0.5s, for example.
also in that release was :
character columns are now allowed in keys and are preferred to
factor. data.table() and setkey() no longer coerce character to
fa...
How to use glOrtho() in OpenGL?
... "common.h"
static const GLuint WIDTH = 800;
static const GLuint HEIGHT = 600;
/* ourColor is passed on to the fragment shader. */
static const GLchar* vertex_shader_source =
"#version 330 core\n"
"layout (location = 0) in vec3 position;\n"
"layout (location = 1) in vec3 color;\n"
"...
WiX tricks and tips
...ility feature must be installed">
Installed OR ((VersionNT < 600) OR IIS_METABASE_COMPAT)
</Condition>
share
edited Mar 26 '09 at 15:03
...
How to design a product table for many kinds of product where each product has many parameters
...rocessing them into tabular layout with your application. Even if you have 600GB of product data you can process it in batches if you require data from every single row in this table.
Going further If you would like to improve the performance of the queries you can select certain operations like fo...
深入理解 x86/x64 的中断体系 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...ode16_sel ; 16-bit code selector
mov word [IDT+3*8+4], 0xc600 ; DPL=3, 16-bit interrupt gate
shr eax, 16
mov [IDT+3*8+8], ax ; offset 31-16
上面这段代码将 vector 3 设置为使用 16-bit interrupt gate，并且使用...
Webfonts or Locally loaded fonts?
...ary Size
Fonts.com: 20,000+
FontSpring: 1000+
FontSquirrel: 300+
Google: 600+
Typekit: 900+
Typography.com (cloud.typography.com): probably 300+ (35 families)
Pricing
Fonts.com: $20/month for 500,000 page views
FontSpring: Varies by font (one-time purchase of fonts)
FontSquirrel: Free
Google: ...
How to parse freeform street/postal address out of text, and into components
...(but complete) addresses:
1) 102 main street
Anytown, state
2) 400n 600e #2, 52173
3) p.o. #104 60203
Even these are possibly valid:
4) 829 LKSDFJlkjsdflkjsdljf Bkpw 12345
5) 205 1105 14 90210
Obviously, these are not standardized. Punctuation and line breaks not guaranteed. Here's wha...
What happens when a computer program runs?
...s for display,
| kernel | *basic* hardware access, etc.
+-----------+ 0x600
| BIOS data | BIOS data area, contained simple hardware descriptions, etc.
+-----------+ 0x400
| interrupt | the interrupt vector table, starting from 0 and going to 1k, contained
| vector | the addresses of routines ...
Possible to do a MySQL foreign key to one of two possible tables?
...1) NOT NULL DEFAULT '33',RATING int(11) NOT NULL DEFAULT '5',IMAGE varchar(600) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,SONG PATH varchar(500) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL,SONG REPEAT int(11) NOT NULL DEFAULT '0',VOLUME float NOT NULL DEFAULT '1',SPEED float NOT NU...
How would you implement an LRU cache in Java?
...cache.getSilent ( 3 ) != null || die ();
ok |= cache.size () < 600 || die();
if ( !ok ) die ();
}
}
This is the last post.. The first post I deleted as it was a LFU not an LRU cache.
I thought I would give this another go. I was trying trying to come up with the simple...