#include <stdio.h>
#include <math.h>
#include <omp.h>
#define N 1000000
int main() {
double sum = 0;
double tbegin = omp_get_wtime();
#pragma omp parallel for reduction( +: sum )
for ( int i = 0; i < N; i++ ) {
sum += cos( i );
}
...
program typical_loop
use omp_lib
implicit none
integer, parameter :: N = 1000000, kd = kind( 1.d0 )
real( kind = kd ) :: sum, tbegin, wtime
integer :: i
sum = 0
tbegin = omp_get_wtime()
!$omp parallel do reduction( +: sum )
do i = 1, N
sum = ...
On a 8 cores Linux machine using GCC version 4.4, the C codes can be compiled and run the following way:
$ gcc -std=c99 -O3 -fopenmp loop.c -o loopc -lm
$ OMP_NUM_THREADS=1 ./loopc
Computing 1000000 cosines and summing them with 1 threads took 0.095832s
$ OMP_NUM_THREADS=2 ./loopc
Computing 100...
The PHP community has a lot of developers creating lots of code. This means that one library’s PHP code may use the same class name as another library. When both libraries are used in the same namespace, they collide and cause trouble.
Namespaces solve this problem. As described in the PHP referenc...
The following MATLAB script shows how to define and call a basic function:
myFun.m:
function [out1] = myFun(arg0, arg1)
out1 = arg0 + arg1;
end
terminal:
>> res = myFun(10, 20)
res =
30
When a base class provides a set of overloaded functions, and a derived class adds another overload to the set, this hides all of the overloads provided by the base class.
struct HiddenBase {
void f(int) { std::cout << "int" << std::endl; }
void f(bool) { std::cout &...
configuration EnableIISFeature
{
node localhost
{
WindowsFeature IIS
{
Ensure = “Present”
Name = “Web-Server”
}
}
}
If you run this configuration in Powershell (EnableIISFeature), it will produce a localho...
#!/usr/bin/env python
"""
An annotated simple socket server example in python.
WARNING: This example doesn't show a very important aspect of
TCP - TCP doesn't preserve message boundaries. Please refer
to http://blog.stephencleary.com/2009/04/message-framing.html
before adaptin...
#!/usr/bin/env python
"""
An annotated simple socket client example in python.
WARNING: This example doesn't show a very important aspect of
TCP - TCP doesn't preserve message boundaries. Please refer
to http://blog.stephencleary.com/2009/04/message-framing.html
before adaptin...
Dynamic SQL enables us to generate and run SQL statements at run time. Dynamic SQL is needed when our SQL statements contains identifier that may change at different compile times.
Simple Example of dynamic SQL:
CREATE PROC sp_dynamicSQL
@table_name NVARCHAR(20),
@col_name NVARCHAR(2...
Unity networking provides the High Level API (HLA) to handle network communications abstracting from low level implementations.
In this example we will see how to create a Server that can communicate with one or multiple clients.
The HLA allows us to easily serialize a class and send objects of ...
Adding tags to "describe" or "it" blocks allows you to run only those examples with a given tag. Use the --tag (or -t) option to run examples that match a specified tag. The tag can be a simple name or a name:value pair.
If a simple name is supplied, only examples with :name...
$ npm install -g parse-server mongodb-runner
$ mongodb-runner start
$ parse-server --appId APPLICATION_ID --masterKey MASTER_KEY --databaseURI mongodb://localhost/test
You can use any arbitrary string as your application id and master key. These will be used by your clients to authenticate with...
The following example uses expect and receive to mock an Order's call to a CreditCardService, so that the test passes only if the call is made without having to actually make it.
class Order
def cancel
CreditCardService.instance.refund transaction_id
end
end
describe Order do
des...
In greeter.rb (wherever that goes in your project):
class Greeter
def greet
"Hello, world!"
end
end
In spec/greeter_spec.rb:
require_relative '../greeter.rb'
RSpec.describe Greeter do
describe '#greet' do
it "says hello" do
expect(Greeter.new.gr...
If you need to store images or videos in the column then we need to change the value as needed by your application
max_allowed_packet = 10M
M is Mb, G in Gb, K in Kb
Most Rails developers start by modifying their model information within the template itself:
<h1><%= "#{ @user.first_name } #{ @user.last_name }" %></h1>
<h3>joined: <%= @user.created_at.in_time_zone(current_user.timezone).strftime("%A, %d %b %Y %l:%M %p&q...
As the picture aspect ratio example indicates, videos are series of pictures that do not necessarily have the same aspect ratio as the final result to be displayed to the user.
So how do you get from those stretched pictures to the normally displayed output? You need a stretching factor! This stret...
