A simple example

Restful Web Service, expose API from your application in a secure, uniform, stateless manner to the calling client. The calling client can perform predefined operations using the Restful service. This formed the standard of how web services are implemented. Inthe web consortium also released the definition of an additional standard called RESTful.

Over the past couple of years, this standard has become quite popular. And is being used by many of the popular websites around the world which include Facebook and Twitter. REST is a way to access resources which lie in a particular environment. For example, you could have a server that could be hosting important documents or pictures or videos.

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All of these are an example of resources. If a client, say a web browser needs any of these resources, it has to send a request to the server to access these resources. Now REST defines a way on how these resources can be accessed. The key elements of a RESTful implementation are as follows: Resources — The first key element is the resource itself.

Let assume that a web application on a server has records of several employees. Request Verbs - These describe what you want to do with the resource.

a simple example

A browser issues a GET verb to instruct the endpoint it wants to get data. Request Headers — These are additional instructions sent with the request. These might define the type of response required or the authorization details. Request Body - Data is sent with the request. In a POST call, the client actually tells the web service that it wants to add a resource to the server. Hence, the request body would have the details of the resource which is required to be added to the server.

Response Body — This is the main body of the response. Response Status codes — These codes are the general codes which are returned along with the response from the web server. An example is the code which is normally returned if there is no error when returning a response to the client.Chemical reactions are evidence a chemical change is occurring.

The starting materials change into new products or chemical species. How do you know a chemical reaction has taken place? If you observe one or more of the following, a reaction may have occurred:. While there are millions of different reactionsmost can be classified as belonging to one of 5 simple categories. Here is a look at these 5 kinds of reactions, with the general equation for each reaction and examples.

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One of the main types of chemical reactions is a synthesis or direct combination reaction. As the name implies, simple reactants make or synthesize a more complex product. The basic form of a synthesis reaction is:. A simple example of a synthesis reaction is the formation of water from its elements, hydrogen, and oxygen:.

Another good example of a synthesis reaction is the overall equation for photosynthesis, the reaction through which plants make glucose and oxygen from sunlight, carbon dioxide, and water:. The opposite of a synthesis reaction is a decomposition or analysis reaction. In this type of reaction, the reactant breaks down into simpler components.

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A telltale sign of this reaction is that you have one reactant, but multiple products. The basic form of a decomposition reaction is:. Breaking water into its elements is a simple example of a decomposition reaction:. Another example is the decomposition of lithium carbonate into its oxide and carbon dioxide:.

In a single displacement or substitution reactionone element replaces another element in a compound. The basic form of a single displacement reaction is:. This reaction is easy to recognize when it takes the form of:. The reaction between zinc and hydrochloric acid to form hydrogen gas and zinc chloride is an example of a single displacement reaction:.

A double displacement or metathesis reaction is just like a single displacement reaction, except two elements replace two other elements or "trade places" in the chemical reaction. The basic form of a double displacement reaction is:. The reaction between sulfuric acid and sodium hydroxide to form sodium sulfate and water is an example of a double displacement reaction:. A combustion reaction occurs when a chemical, usually a hydrocarbon, reacts with oxygen.

If a hydrocarbon is a reactant, the products are carbon dioxide and water. Heat is released, too. The easiest way to recognize a combustion reaction is to look for oxygen on the reactant side of a chemical equation.

The basic form of a combustion reaction is:. A simple example of a combustion reaction is the burning of methane:. In addition to the 5 main types of chemical reactions, there are other important categories of reactions and other ways to classify reactions.If you want to report an error, or if you want to make a suggestion, do not hesitate to send us an e-mail:.

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LOG IN. New User? Sign Up For Free! Forgot password? Links Link Colors Link Bookmarks. The title attribute The href attribute The width and height attributes The alt attribute Attribute without quotes Attribute without quotes does not work.

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a simple example

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Inline frame a frame inside an HTML page. Form with text input Form with radio button input Form with text fields and a submit button Form with a text fields without a name attribute Grouping Form Data. Input type text Input type password Input type radio Input type checkbox Input type button Input type number - with restrictions Input type number - with steps Input type date - with date picker Input type date - with restrictions Input type color - with color picker Input type range Input type month Input type week Input type time Input type datetime Input type datetime-local Input type email Input type search Input type tel Input type url.

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Store a name permanently Store a counter permanently Store a counter for one session. HOW TO. Your message has been sent to W3Schools. W3Schools is optimized for learning and training. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content.

While using W3Schools, you agree to have read and accepted our terms of usecookie and privacy policy. Copyright by Refsnes Data. All Rights Reserved. W3Schools is Powered by W3.Published on February 19, by Rebecca Bevans. Revised on October 26, Regression models describe the relationship between variables by fitting a line to the observed data. Linear regression models use a straight line, while logistic and nonlinear regression models use a curved line.

RESTful Web Services Tutorial with Example

Regression allows you to estimate how a dependent variable changes as the independent variable s change. Simple linear regression is used to estimate the relationship between two quantitative variables. You can use simple linear regression when you want to know:. Your independent variable income and dependent variable happiness are both quantitative, so you can do a regression analysis to see if there is a linear relationship between them.

If you have more than one independent variable, use multiple linear regression instead. Table of contents Assumptions of simple linear regression How to perform a simple linear regression Interpreting the results Presenting the results Can you predict values outside the range of your data? Frequently asked questions about simple linear regression.

Simple linear regression is a parametric testmeaning that it makes certain assumptions about the data.

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These assumptions are:. If your data do not meet the assumptions of homoscedasticity or normality, you may be able to use a nonparametric test instead, such as the Spearman rank test.

If your data violate the assumption of independence of observations e. Linear regression finds the line of best fit line through your data by searching for the regression coefficient B 1 that minimizes the total error e of the model. While you can perform a linear regression by handthis is a tedious process, so most people use statistical programs to help them quickly analyze the data.

R is a free, powerful, and widely-used statistical program. Download the dataset to try it yourself using our income and happiness example. Dataset for simple linear regression. Load the income. To learn more, follow our full step-by-step guide to linear regression in R. To view the results of the model, you can use the summary function in R:.

This function takes the most important parameters from the linear model and puts them into a table, which looks like this:. The first row gives the estimates of the y-intercept, and the second row gives the regression coefficient of the model. Row 1 of the table is labeled Intercept. This is the y-intercept of the regression equation, with a value of 0.The Financial Times reports that in May 2016 Apple sat down with Time Warner, one of the biggest entertainment companies in the world, and spoke seriously about an acquisition deal.

The deal never got beyond the exploratory phase, but this does strongly suggest that Apple is in the market for an acquisition that will give it a foothold in video content - something that would prove valuable in the event that its rumoured TV-streaming service comes to pass. With Time Warner apparently out of the picture, many analysts believe that the next target could be Netflix, but we're still in the realm of the mega-deal, so don't bet your live savings on the deal happening.

The company is said to have had up to 1,000 developers working on the so-called Project Titan, and to have set up various different front companies, including Faraday Futures and Sixty Eight Research.

We'd love to see it on the roads in 2018, but industry chatter suggests 2020 is a more likely date.

Simple Chemical Reactions

If this is correct, it might not be worth holding back on an interim upgrade to your existing run-around next year. I saw this on Macworld UK and thought you should see it too.

Golden Globe 2017 Predictions: What TV Shows and Stars Will Score Nominations. Here, Variety predicts which names may be read aloud come official nominations on the morning of Dec.

a simple example

Besides its setting on the other side of the pond, the story has international appeal due to its grand scope, both in production design and storytelling. Related Golden Globe 2017 Predictions: What Films Will Score Nominations. It also boasts a deep cast of HFPA favorites from James Franco, who plays twins, to Maggie Gyllenhaal, who delivers a bravura performance. The David Shore-led series for the Alphabet centers on Freddie Highmore as a medical professional with autism and savant syndrome, putting a new emotional twist on a traditional (medical) format.

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The accolades have only increased since, as it went on to win the Emmy Award for best drama the first trophy for a streaming service in the category. Franco flipped effortlessly between decent and degenerate to bring to life two very different men struggling to succeed. Shaun Murphy, a character who has autism and savant syndrome.

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Given that its third season features a final guest starring performance from Carrie Fisher, it certainly seems ripe for a nom. The premium cable comedy offers an idiosyncratic take on single motherhood. In its second life, though, that all could change. Nommed last year, Ansari deserves another shot for the second season, which saw him show off his culinary skills as well as his fluency in Italian.

The HFPA may want to use a nomination to thank him for that return. And breaks into song. With the show coming to an end, voters will want to take advantage of all opportunities to recognize her.

After digging deep to explore the grief of losing her husband, this season finds her more hopeful and playful in exploring new love and a blossoming career. This season sees Rainbow Johnson facing real-life issues as she grapples with postpartum depression following the birth of her fifth baby. Featuring rare small-screen appearances by Nicole Kidman and Reese Witherspoon, the multiple Emmy winning limited series tackles hot-button topics such as domestic abuse.

With noms for its two previous seasons, it seems a lock. Moss won a Globe and the show a nom for its first outing. The dichotomy of such different personalities may cement his nom. She shone a grounded but frightening light on domestic abuse with her performance, taking home the Emmy for it.

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An introduction to simple linear regression

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