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What does glLoadIdentity() do in OpenGL?
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139
The identity matrix, in terms of the projection and modelview matrices, essentially resets the...
How do you use “
...) {
function(x) x ^ exponent
}
square <- power(2)
square(2) # -> [1] 4
square(4) # -> [1] 16
cube <- power(3)
cube(2) # -> [1] 8
cube(4) # -> [1] 64
The ability to manage variables at two levels also makes it possible to maintain the state across function invocations by allow...
Cannot add or update a child row: a foreign key constraint fails
table 1
24 Answers
24
...
How to pipe stdout while keeping it on screen ? (and not to a output file)
...ty | foo
Reference: The Open Group Base Specifications Issue 7
IEEE Std 1003.1, 2013 Edition, §10.1:
/dev/tty
Associated with the process group of that process, if any. It is
useful for programs or shell procedures that wish to be sure of
writing messages to or reading data from the...
Streaming a video file to an html5 video player with Node.js so that the video controls continue to
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117
The Accept Ranges header (the bit in writeHead()) is required for the HTML5 video controls to ...
How to grant remote access to MySQL for a whole subnet?
...n as a wildcard in the IP address.
From http://dev.mysql.com/doc/refman/5.1/en/grant.html
You can specify wildcards in the host name. For example, user_name@'%.example.com' applies to user_name for any host in the example.com domain, and user_name@'192.168.1.%' applies to user_name for any host...
std::shared_ptr thread safety explained
...e only newly created object?
is incorrect. Only d will point to the new A(10), and a, b, and c will continue to point to the original A(1). This can be seen clearly in the following short example.
#include <memory>
#include <iostream>
using namespace std;
struct A
{
int a;
A(int a)...
Do I need a content-type header for HTTP GET requests?
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115
According to the RFC 7231 section 3.1.5.5:
A sender that generates a message containing a ...
What is the maximum length of latitude and longitude? [closed]
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If latitude coordinate is reported as -6.3572375290155 or -63.572375290155 in decimal degrees then you could round-off and store up to 6 decimal places for 10 cm (or 0.1 meter) precision.
Overview
The valid range of latitude in degrees is -90 and +90 for the southern and nort...
Python list iterator behavior and next(iterator)
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199
What you see is the interpreter echoing back the return value of next() in addition to i being...