Monotonic predicates can be debugged by applying declarative reasoning.
In pure Prolog, a programming mistake can lead to one or all of the following phenomena:
the predicate incorrectly succeeds in a case where it should fail
the predicate incorrectly fails in a case where it should succeed
t...
Examples of monotonic predicates are:
unification with (=)/2 or unify_with_occurs_check/2
dif/2, expressing disequality of terms
CLP(FD) constraints like (#=)/2 and (#>)/2, using a monotonic execution mode.
Prolog predicates that only use monotonic goals are themselves monotonic.
Monoton...
Here are examples of predicates that are not monotonic:
meta-logical predicates like var/1, integer/1 etc.
term comparison predicates like (@<)/2 and (@>=)/2
predicates that use !/0, (\+)/1 and other constructs that break monotonicity
all-solutions predicates like findall/3 and setof/3.
...
Here are examples of how to use monotonic predicates instead of impure, non-monotonic constructs in your programs:
dif/2 is meant to be used instead of non-monotonic constructs like (\=)/2
arithmetic constraints (CLP(FD), CLP(Q) and others) are meant to be used instead of moded arithmetic predi...
It is sometimes argued that, for the sake of efficiency, we must accept the use of non-monotonic constructs in real-world Prolog programs.
There is no evidence for this. Recent research indicates that the pure monotonic subset of Prolog may not only be sufficient to express most real-world programs...
using OpenQA.Selenium;
using OpenQA.Selenium.Chrome;
namespace BasicWebdriver
{
class WebDriverTest
{
static void Main()
{
using (var driver = new ChromeDriver())
{
driver.Navigate().GoToUrl("http://www.google.com"...
To interact with WebElements in a webpage, first we need to identify the location of the element.
By is the keyword available in selenium.
You can locate the elements By..
By ID
By Class Name
By TagName
By Name
By Link Text
By Partial Link Text
By CSS Selector
By XPath
Using JavaScript
...
It is deemed best practice to always use Option Explicit in VBA as it forces the developer to declare all their variables before use. This has other benefits too, such as auto-capitalization for declared variable names and IntelliSense.
Option Explicit
Sub OptionExplicit()
Dim a As Integer
...
Option Compare Binary
Binary comparison makes all checks for string equality within a module/class case sensitive. Technically, with this option, string comparisons are performed using sort order of the binary representations of each character.
A < B < E < Z < a < b < e < z
...
List<Integer> nums = Arrays.asList(1, 2, 3);
List<String> strings = nums.stream()
.map(Object::toString)
.collect(Collectors.toList());
That is:
Create a stream from the list
Map each element using Object::toString
Collect the String values into a List using Collectors...
In general, UWP is used for making a single application that runs on Windows 10 across many different devices. However, it is also possible to make code tailored to specific devices. You can achieve this in several different ways.
Different XAML Layout
If you want to use a specific layout on for a...
The chan-signal crate provides a solution to handle OS signal using channels, altough this crate is experimental and should be used carefully.
Example taken from BurntSushi/chan-signal.
#[macro_use]
extern crate chan;
extern crate chan_signal;
use chan_signal::Signal;
fn main() {
// S...
The nix crate provides an UNIX Rust API to handle signals, however it requires using unsafe rust so you should be careful.
use nix::sys::signal;
extern fn handle_sigint(_:i32) {
// Be careful here...
}
fn main() {
let sig_action = signal::SigAction::new(handle_sigint,
...
Unlike emails, JIDs were defined with Internationalization (i18n) in mind using the
Preparation, Enforcement, and Comparison of Internationalized Strings (PRECIS) framework. PRECIS (defined in RFC 7564), is a framework for comparing strings safely in a variety of contexts. For instance, imagine you...
A very basic docker-compose.yml looks like this:
version: '2'
services:
hello_world:
image: ubuntu
command: [/bin/echo, 'Hello world']
This file is making it so that there's a hello_world service, that's initialized from the ubuntu:latest image and that, when it's run, it just runs...
Sometimes one has to work with pages that are not using jQuery while most developers are used to have jQuery handy.
In such situations one can use Chrome Developer Tools console (F12) to manually add jQuery on a loaded page by running following:
var j = document.createElement('script');
j.onload ...
The first interesting thing to know is how to write comments.
In VB .NET, you write a comment by writing an apostrophe ' or writing REM. This means the rest of the line will not be taken into account by the compiler.
'This entire line is a comment
Dim x As Integer = 0 'This comment is here to say...
