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...
//Example 1
int[] array = { 1, 5, 2, 10, 7 };
// Select squares of all odd numbers in the array sorted in descending order
IEnumerable<int> query = from x in array
where x % 2 == 1
orderby x descending
select x ...
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
...
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
...
set can also be invoked with just one argument. When called with just one argument, it returns the contents of that argument.
% set x 235
235
% set x
235
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...
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...
Adding a footer is not natively possible. Luckily, we can make use of jQuery and CSS to add a footer to the slides of an ioslides presentation rendered with knitr.
First of all we have to include the jQuery plugin. This is done by the line
<script src="https://ajax.googleapis.com/ajax/libs...
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 ...
One interesting thing is the ability to add you own comments into Visual Studio Intellisense. So you can make your own written functions and classes self-explanatory. To do so, you must type the comment symbol three times the line above your function.
Once done, Visual Studio will automatically add...
In VB.NET, every variable must be declared before it is used (If Option Explicit is set to On). There are two ways of declaring variables:
Inside a Function or a Sub:
Dim w 'Declares a variable named w of type Object (invalid if Option Strict is On)
Dim x As String 'Declares a variable named ...
Modifiers are a way to indicate how external objects can access an object's data.
Public
Means any object can access this without restriction
Private
Means only the declaring object can access and view this
Protected
Means only the declaring object and any object that inherits from...
