Angular - Chapter 4 - Data and Event HandlingWebStackAcademy
In Angular , events such as button click or any other sort of events can also be handled very easily. The events get triggered from the html page and are sent across to Angular JS class for further processing.
Data binding is a core concept in Angular and allows to define communication between a component and the DOM, making it very easy to define interactive applications without worrying about pushing and pulling data. There are four forms of data binding and they differ in the way the data is flowing.
Angular - Chapter 4 - Data and Event HandlingWebStackAcademy
In Angular , events such as button click or any other sort of events can also be handled very easily. The events get triggered from the html page and are sent across to Angular JS class for further processing.
Data binding is a core concept in Angular and allows to define communication between a component and the DOM, making it very easy to define interactive applications without worrying about pushing and pulling data. There are four forms of data binding and they differ in the way the data is flowing.
Form validation normally used to occur at the server, after the client had entered all the necessary data and then pressed the Submit button. If the data entered by a client was incorrect or was simply missing, the server would have to send all the data back to the client and request that the form be resubmitted with correct information. This was really a lengthy process which used to put a lot of burden on the server.
JavaScript provides a way to validate form's data on the client's computer before sending it to the web server. Form validation generally performs two functions.
Basic Validation − First of all, the form must be checked to make sure all the mandatory fields are filled in. It would require just a loop through each field in the form and check for data.
Data Format Validation − Secondly, the data that is entered must be checked for correct form and value. Your code must include appropriate logic to test correctness of data.
Debugging in JavaScript
It is common to have errors while writing codes and the errors can be due to syntax or logical. These errors create a lot of ambiguity in the logic and understanding of both users and programmers. There can also be errors in the code which can remain invisible to the programmer’s eye and can create havoc. To identify these errors we need Debuggers that can go through the entire code or program, identify the errors and also fix them.
-Debugger
The debugger keyword is used in the code to force stop the execution of the code at a breaking point and calls the debugging function. The debugger function is executed if any debugging is needed at all else no action is performed.
The Browser Object Model (BOM) in JavaScript includes the properties and methods for JavaScript to interact with the web browser.
BOM provides you with window object, for example, to show the width and height of the window. It also includes the window.screen object to show the width and height of the screen.
A directive is a custom HTML element that is used to extend the power of HTML. Angular 2 has the following directives that get called as part of the BrowserModule module.
ngif
ngFor
If you view the app.module.ts file, you will see the following code and the BrowserModule module defined. By defining this module, you will have access to the 2 directives.
Generally speaking, a function is a "subprogram" that can be called by code external (or internal in the case of recursion) to the function. Like the program itself, a function is composed of a sequence of statements called the function body. Values can be passed to a function, and the function will return a value.
In JavaScript, functions are first-class objects, because they can have properties and methods just like any other object. What distinguishes them from other objects is that functions can be called. In brief, they are Function objects.
Exploring attitudes towards peer feedback in the writing classroom ライティングにおける...Haidee Thomson
Slides from my presentation at JALT Hokkaido Conference 21 September, 2014. Attitudes to peer-feedback are explored in EFL writing classes in a private university in Japan. Students appear generally open to sharing and participating in peer-feedback, though experience with implementation is mixed (as seen in the end of semester survey results). Modeling and training before implementation is recommended (I should have done more). Mixing partners is also recommended so that learners experience a variety of feedback styles from various peers.
Form validation normally used to occur at the server, after the client had entered all the necessary data and then pressed the Submit button. If the data entered by a client was incorrect or was simply missing, the server would have to send all the data back to the client and request that the form be resubmitted with correct information. This was really a lengthy process which used to put a lot of burden on the server.
JavaScript provides a way to validate form's data on the client's computer before sending it to the web server. Form validation generally performs two functions.
Basic Validation − First of all, the form must be checked to make sure all the mandatory fields are filled in. It would require just a loop through each field in the form and check for data.
Data Format Validation − Secondly, the data that is entered must be checked for correct form and value. Your code must include appropriate logic to test correctness of data.
Debugging in JavaScript
It is common to have errors while writing codes and the errors can be due to syntax or logical. These errors create a lot of ambiguity in the logic and understanding of both users and programmers. There can also be errors in the code which can remain invisible to the programmer’s eye and can create havoc. To identify these errors we need Debuggers that can go through the entire code or program, identify the errors and also fix them.
-Debugger
The debugger keyword is used in the code to force stop the execution of the code at a breaking point and calls the debugging function. The debugger function is executed if any debugging is needed at all else no action is performed.
The Browser Object Model (BOM) in JavaScript includes the properties and methods for JavaScript to interact with the web browser.
BOM provides you with window object, for example, to show the width and height of the window. It also includes the window.screen object to show the width and height of the screen.
A directive is a custom HTML element that is used to extend the power of HTML. Angular 2 has the following directives that get called as part of the BrowserModule module.
ngif
ngFor
If you view the app.module.ts file, you will see the following code and the BrowserModule module defined. By defining this module, you will have access to the 2 directives.
Generally speaking, a function is a "subprogram" that can be called by code external (or internal in the case of recursion) to the function. Like the program itself, a function is composed of a sequence of statements called the function body. Values can be passed to a function, and the function will return a value.
In JavaScript, functions are first-class objects, because they can have properties and methods just like any other object. What distinguishes them from other objects is that functions can be called. In brief, they are Function objects.
Exploring attitudes towards peer feedback in the writing classroom ライティングにおける...Haidee Thomson
Slides from my presentation at JALT Hokkaido Conference 21 September, 2014. Attitudes to peer-feedback are explored in EFL writing classes in a private university in Japan. Students appear generally open to sharing and participating in peer-feedback, though experience with implementation is mixed (as seen in the end of semester survey results). Modeling and training before implementation is recommended (I should have done more). Mixing partners is also recommended so that learners experience a variety of feedback styles from various peers.
Ajax stands for Asynchronous JavaScript and Xml. Ajax is not a single technology, but a group of technologies. HTML and CSS can be used in combination to mark up and style information. The DOM is accessed with JavaScript to dynamically display, and allow the user to interact with, the information presented. JavaScript and the XMLHttpRequest object provide a method for exchanging data asynchronously between browser and server to avoid full page reloads.
Bally Chohan IT Solution is an UK based IT Agency that provides IT services such as Web Development, Web Designing, E-commerce development etc.
GraphRAG is All You need? LLM & Knowledge GraphGuy Korland
Guy Korland, CEO and Co-founder of FalkorDB, will review two articles on the integration of language models with knowledge graphs.
1. Unifying Large Language Models and Knowledge Graphs: A Roadmap.
https://arxiv.org/abs/2306.08302
2. Microsoft Research's GraphRAG paper and a review paper on various uses of knowledge graphs:
https://www.microsoft.com/en-us/research/blog/graphrag-unlocking-llm-discovery-on-narrative-private-data/
Encryption in Microsoft 365 - ExpertsLive Netherlands 2024Albert Hoitingh
In this session I delve into the encryption technology used in Microsoft 365 and Microsoft Purview. Including the concepts of Customer Key and Double Key Encryption.
Epistemic Interaction - tuning interfaces to provide information for AI supportAlan Dix
Paper presented at SYNERGY workshop at AVI 2024, Genoa, Italy. 3rd June 2024
https://alandix.com/academic/papers/synergy2024-epistemic/
As machine learning integrates deeper into human-computer interactions, the concept of epistemic interaction emerges, aiming to refine these interactions to enhance system adaptability. This approach encourages minor, intentional adjustments in user behaviour to enrich the data available for system learning. This paper introduces epistemic interaction within the context of human-system communication, illustrating how deliberate interaction design can improve system understanding and adaptation. Through concrete examples, we demonstrate the potential of epistemic interaction to significantly advance human-computer interaction by leveraging intuitive human communication strategies to inform system design and functionality, offering a novel pathway for enriching user-system engagements.
Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
Are you looking to streamline your workflows and boost your projects’ efficiency? Do you find yourself searching for ways to add flexibility and control over your FME workflows? If so, you’re in the right place.
Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
UiPath Test Automation using UiPath Test Suite series, part 4DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 4. In this session, we will cover Test Manager overview along with SAP heatmap.
The UiPath Test Manager overview with SAP heatmap webinar offers a concise yet comprehensive exploration of the role of a Test Manager within SAP environments, coupled with the utilization of heatmaps for effective testing strategies.
Participants will gain insights into the responsibilities, challenges, and best practices associated with test management in SAP projects. Additionally, the webinar delves into the significance of heatmaps as a visual aid for identifying testing priorities, areas of risk, and resource allocation within SAP landscapes. Through this session, attendees can expect to enhance their understanding of test management principles while learning practical approaches to optimize testing processes in SAP environments using heatmap visualization techniques
What will you get from this session?
1. Insights into SAP testing best practices
2. Heatmap utilization for testing
3. Optimization of testing processes
4. Demo
Topics covered:
Execution from the test manager
Orchestrator execution result
Defect reporting
SAP heatmap example with demo
Speaker:
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
Software Delivery At the Speed of AI: Inflectra Invests In AI-Powered QualityInflectra
In this insightful webinar, Inflectra explores how artificial intelligence (AI) is transforming software development and testing. Discover how AI-powered tools are revolutionizing every stage of the software development lifecycle (SDLC), from design and prototyping to testing, deployment, and monitoring.
Learn about:
• The Future of Testing: How AI is shifting testing towards verification, analysis, and higher-level skills, while reducing repetitive tasks.
• Test Automation: How AI-powered test case generation, optimization, and self-healing tests are making testing more efficient and effective.
• Visual Testing: Explore the emerging capabilities of AI in visual testing and how it's set to revolutionize UI verification.
• Inflectra's AI Solutions: See demonstrations of Inflectra's cutting-edge AI tools like the ChatGPT plugin and Azure Open AI platform, designed to streamline your testing process.
Whether you're a developer, tester, or QA professional, this webinar will give you valuable insights into how AI is shaping the future of software delivery.
JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
In this webinar, we will review the benefits of leveraging InfluxDB and Grafana when executing load tests and demonstrate how these tools are used to visualize performance metrics.
Length: 30 minutes
Session Overview
-------------------------------------------
During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
- What out-of-the-box solutions are available for real-time monitoring JMeter tests?
- What are the benefits of integrating InfluxDB and Grafana into the load testing stack?
- Which features are provided by Grafana?
- Demonstration of InfluxDB and Grafana using a practice web application
To view the webinar recording, go to:
https://www.rttsweb.com/jmeter-integration-webinar
Securing your Kubernetes cluster_ a step-by-step guide to success !KatiaHIMEUR1
Today, after several years of existence, an extremely active community and an ultra-dynamic ecosystem, Kubernetes has established itself as the de facto standard in container orchestration. Thanks to a wide range of managed services, it has never been so easy to set up a ready-to-use Kubernetes cluster.
However, this ease of use means that the subject of security in Kubernetes is often left for later, or even neglected. This exposes companies to significant risks.
In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
Assuring Contact Center Experiences for Your Customers With ThousandEyes
ajax_pdf
1. AJAX Tutorial
Introduction
This tutorial assumes that you have the basic knowledge of HTML, JavaScript and the basis of the client-server
model. That is all you need to start building basic AJAX applications.
What is AJAX?
Just for your information, AJAX stands for Asynchronous JavaScript And XML. But don’t pay much attention to the
name; it is unfortunately chosen. What you need to know is that AJAX is not a new technology, it is a combination
of existing technologies like HTML, JavaScript, DHTML and DOM. Really it’s just an innovative approach to
combine these technologies to suit the needs of the always developing web applications.
What can AJAX do for you?
AJAX can make your webapps more user friendly. Perhaps the easiest illustration is when a user is filling some king
of form as a part of your webapp and based on the partial user input you can perform a database check
transparently to the user while he is still busy with filling the rest of the form. As a result of that asynchronous
request you can assist the user with various information(like username is taken, auto fill the rest of the form…)
making the GUI of the webapp user-friendly like the one of a standard stand-alone application.
Mixing the Technologies
Here are the basic technologies involved in AJAX:
HTML is used to build web forms and identify fields that you’ll use in the rest of the webapp
JavaScript code is the code used in AJAX to facilitate communication with server applications
DHTML, of Dynamic HTML, helps you update your forms dynamically through usage of div, span and other
dynamic HTML elements
DOM, the Document Object Model, is used to work with both the structure of your HTML and (in some cases)
the XML returned from the server.
The XMLHttpRequest object
In this second part of this tutorial we'll take a look at the XMLHttpRequest object; object that you'll need in order to
make asynchronous requests to the server logic. It's quite simple and most of the time you'll either retype the creation
and request code of use ctrl-C/V. So, let's get started.
What is XMLHttpRequest object?
Basically, it is a JavaScript object, nothing more. Here's the code you need to create it:
Listing 1. Create a new XMLHttpRequest object
<script language="javascript" type="text/javascript">
var xmlHttp = new XMLHttpRequest();
</script>
What it should be clear to you about this object is that this is the object that does the communication with the server
logic using JavaScript technology, nothing more. So, what AJAX basically does is that it puts this object between
your webapplication user forms and the webserver logic(some script, like cgi, php, jsp/servlet..). This is the new
thinking that lets the web application to have the user interface friendliness like a desktop application, but with all the
power of the Internet behind it.
Dealing with Multiple Browsers
2. Unfortunatelly, the proper creation of the XMLHttpRequest object is not so simple thanks to the variety of browsers.
For example, the above code will work with Microsoft browsers. Without getting further in the problems, I'll simply
present a code that you can use that will create the XMLHttpRequest object no matter the browser and report an error
message if the client has JavaScript disabled in her/his browser. Here's that code:
Listing 2. Dealing with various browsers
var xmlHttp = false;
/*@cc_on @*/
/*@if (@_jscript_version >= 5)
try {
/* try the first version of JavaScript in IE */
xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
/* try the second version of JavaScript in IE */
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e2) {
xmlHttp = false;
}
}
@end @*/
/* else create the object the non-Microsoft way */
if (!xmlHttp && typeof XMLHttpRequest != 'undefined') {
xmlHttp = new XMLHttpRequest();
}
Don't mind the fancy compiler-spicific tags like @cc_on, just remember that this is the code that you can rely on to
sucesfully create the XMLHttpRequest no matter the browser.
Adding some standard JavaScript
We know how to create the XMLHttpRequest object that we need in order to communicate with the server logic
(invoke a particular script). Now we need to learn how to put information in this object in order to pass information
to the web server that the script needs in order to satisfy the request. Next, we need to make the request and receive
the response that we can use to update the form that the user is woking on. Suppose the following scenario:
The user of our web application is using a form to modify the information regarding a warehouse item already stored
in the database. In most cases, the user will want to change a field or two about the item(eg. new address and website)
but wants to view all the current information about the item. Instead of requiring the user to rewrite ALL the
information about the item, we can use AJAX to detect the selection of the itemID from an drop-down menu and use
that info to fetch the appropriate related data for the item from the database. This means that the user in a second or
two will have all the information for the item auto-filled in the form and can only modify the ones it needs. That's the
user-friendliness I was talking about earlier. The code to do such a thing is not complicated. In the following sections
I'll present and explain the parts needed for that code and in the final section we'll reassemble that whole code. So let's
get started!
1. Preparing our user form
First, we need to slightly modify our user form in order for it's elements to be accessible through our code. Again, this
is not something new it's just regular HTML. This typically means adding id attributes to our form elements in order
to identify those elements and using the onChange attribute to specify the action that should be taken when its value
changes( the user types something on it or selects it from drop-down menu ). To simplify our code we consider that
the user types the itemID in a input field. The exactly same attributes(id and onChange) can be added to drop-down
menus or whatever form element. Here's the code:
Listing 3. Preraring out input form for some AJAX usage
3. <form...>
<input type="text" name="itemID" id="item"
onChange="callServer();">
(...may add other elements here using usual HTML...)
</form...>
<div id="newForm">
On this place a whole pre-filled form
will appear according to the selection of
the itemID field. This form will the created
by the server.
</div>
There are two things to remember(in case you never used them in your HTML's): the id attribute whose value we'll
use in our AJAX(well the JavaScript part of AJAX) code to retrieve the values from the form elements and to
dispatch those values to the server logic, using XMLHttpRequest ofcourse.
The second onChange attribute is used to indicate which JavaScript method to invoke in order to process the event
that has occured, that is, the user typed something in the field. That method, in this case, is named callServer, but can
be any other name.
2. Creating the XMLHttpRequest, dispatching the request and handling the response
In this step, we create the XMLHttpRequest object, that is the object that is responsible for handling the
communication between the client and the server, we retrieve the user-entered itemID from the form, issue a request
to the server with the retrieved parameter as argument to that request and handling the server response. The creation
of the XMLHttpRequest object is exactly the same as above, and the same code is used here. Now look at the code
and afterwards we'll see and explain the new things:
Listing 4. Creating XMLHttpRequest and issuing the request
/* Creating the XMLHttpRequest same as above */
var xmlHttp = false;
/*@cc_on @*/
/*@if (@_jscript_version >= 5)
try {
/* try the first version of JavaScript in IE */
xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try {
/* try the second version of JavaScript in IE */
xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e2) {
xmlHttp = false;
}
}
@end @*/
/* else create the object the non-Microsoft way */
if (!xmlHttp && typeof XMLHttpRequest != 'undefined') {
xmlHttp = new XMLHttpRequest();
}
/* the 'new' part:*/
/* 1. retrieving the entered data and
issuing the request */
function callServer() {
//Get the itemID value from the form elements
var item = document.getElementById("item");
//check whether the element has value
if((item==null) || (item=="")) return;
4. //make the URL that will process the request
var url = "/scripts/getItemInformation?item="
+escape(item);
//make a connection to the server
xmlHttp = OPEN("GET",url,true);
// Setup a function for the server to run when it's done
xmlHttp.onreadystatechange = updatePage;
// Send the request
xmlHttp.send(null);
}
/* 2. handling the server response */
function updatePage() {
if (xmlHttp.readyState == 4) {
var response = xmlHttp.responseText;
document.getElementById("newForm").value = response;
}
}
Now, let's clear things up. In the first part we create the XMLHttpRequest object as usual. Afterwards, we dispatch
the request to the server. The substeps used are to retrieve the value using getElementById(that's why we specified
the id attribute previously when we were preparing our form for AJAX/JavaScript usage. Afterwards, we checked
whether the value retrieved is valid and build the URL to the server script that will process the request passing the
retrieved data as it's parameter. Then, we opened the connection to the server declaring that we're going to use a GET
request(in a future tutorials i'll cover the POST request), the URL we've just build and a boolean literal of true(don't
worry about the meaning, just know it's should be true). Next, we declare which function should be invoked when the
server finishes the processing of our request which is updatePage in our case. In the last step, we effect the things
that we declared in the previous steps by issuing a send(null) call to the XMLHttpRequest object we created
previously.
What's left is to implement the updatePage function that will handle the response and make the changes to the user
form. In the first line we check whether it is safe to use the response(checking whether the server has finished with
the generation of the response for sure). Don't worry about its meaning, just know that when readyState has a value
of 4 you're safe with using the response, no matter the browser. In the last line, we just display the result from the
server to our form. In our case, the response is a newly generated form that has it's fields preset to the appropriate
values specific to the selected itemID field by the user. We're just taking that whole prepared response and we're
putting it in display in our form.
As a result of this, our user just after selecting the itemID will get a brand new preset form on it's page, asking it to
just modify the fields he feels need changes. That's the user-friendliness of the webapp GUI that was not possible
with the standard way of thinking about the client/server requests.
An end note
The abobe illustrative example is just one example of the AJAX approach. Use your creativity and think of the
possible applications that AJAX can have in order for you to make rich, responsive web applications. We have to
admit that no matter how efficient, clever and innovative your underlying application logic is, without the ease of use
and the impressive GUI, in the eyes of the user your application will be dull and repulsive!
This isn't goodbye!
I hope I helped you to learn the basis of the AJAX approach and I sincerely hope that in the past hours you've actually
lerned something from this tutorial. If so, please drop me a note at ipenov@gmail.com and tell me how can I
improve it. In the meantime, visit this page for some more tutorials and software.