IT Fashion

Thursday, June 8, 2017

Java Annotations & Reflection & Lambda Expressions

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Java Annotations

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Java Reflection Tutorial

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Java Lambda Expressions

Getting Started with Apache TomEE

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Getting Started with Apache TomEE
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Dynamic Web Project option missing in Eclipse
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Eclipse Dynamic Web Project missing / Java EE Tools not available + Installing External Tools
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Dynamic Web projects and applications
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The import javax.servlet can't be resolved
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java EJB: The import javax.ejb cannot be resolved
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Several ports (8005, 8080, 8009) required by Tomcat Server at localhost are already in use
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JavaEE Examples

Monday, June 5, 2017

How to connect one model variable to mutiple html elements using angularjs data binding?

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How to connect one model variable to mutiple html elements using angularjs data binding?

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Top 18 Most Common Mistakes that AngularJS Developers Make

Common Mistake #2: Not Having a Dot In There

You probably have read that if you were not having a dot in your ng-model, you were doing it wrong. When it regards inheritance, that statement is often true. Scopes have a prototypal model of inheritance, typical to JavaScript, and nested scopes are common to AngularJS. Many directives create child scopes such as ngRepeat, ngIf, and ngController. When resolving a model, the lookup starts on the current scope and goes through every parent scope, all the way to $rootScope.
But, when setting a new value, what happens depends on what kind of model (variable) we want to change. If the model is a primitive, the child scope will just create a new model. But if the change is to a property of a model object, the lookup on parent scopes will find the referenced object and change its actual property. A new model would not be set on the current scope, so no masking would occur:

function MainController($scope) {
  $scope.foo = 1;
  $scope.bar = {innerProperty: 2};
}

angular.module(‘myApp’, [])
.controller('MainController', MainController);

<div ng-controller=“MainController">
  <p>OUTER SCOPE:</p>
  <p>{{ foo }}</p>
  <p>{{ bar.innerProperty }}</p>
  <div ng-if=“foo”> <!— ng-if creates a new scope —>
    <p>INNER SCOPE</p>
    <p>{{ foo }}</p>
    <p>{{ bar.innerProperty }}</p>
    <button ng-click="foo = 2”>Set primitive</button>
    <button ng-click=“bar.innerProperty = 3”>Mutate object</button>
  </div>
</div>

Clicking the button labelled “Set primitive” will set foo in the inner scope to 2, but will not change foo in the outer scope.
Clicking the button labelled “Change object” will change the bar property from the parent scope. Since there is no variable on the inner scope, no shadowing will happen, and the visible value for bar will be 3 in both scopes.
Another way to do this is to leverage the fact that the parent scopes and the root Scope are referenced from every scope. The $parent and $root objects can be used to access the parent scope and $rootScope, respectively, directly from the view. It may be a powerful way, but I am not a fan of it due to the problem with targeting a particular scope up the stream. There is another way to set and access properties specific to a scope - using the controllerAs syntax.

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AnularJS 'limitTo' filter inside/outside div element with 'ng-if' attribute

AnularJS 'limitTo' filter inside/outside div element with 'ng-if' attribute

The 'ng-repeat' limitTo filter won't work unless you remove the ng-if='true' attribute or put the <ul> list inside div element.

<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.4/angular.min.js"></script>
<body ng-app="myApp" ng-controller="namesCtrl">

<div ng-if='true'>

<p>Type a letter in the input field:</p>

<p><input type="number" ng-model="test"></p>
</div>
<ul>
<li ng-repeat="x in names | limitTo:test">
    {{ x }}
</li>
</ul>

<script>
angular.module('myApp', []).controller('namesCtrl', function($scope) {
    $scope.names = [
        'Jani',
        'Carl',
        'Margareth',
        'Hege',
        'Joe',
        'Gustav',
        'Birgit',
        'Mary',
        'Kai'
    ];
});
</script>

<p>The list will only consists of names matching the filter.</p>
</body>
</html>

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How to connect one model variable to mutiple html elements using angularjs data binding?

Sunday, June 4, 2017

< input type=“number” > not working in IE10

IE doesn't have support for input type="number" but you can use a polyfill to make it work.

Here is the solution : http://html5please.com/#number

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<input type=“number”> not working in IE10

Showing Spinner GIF during $http request in angular

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Showing Spinner GIF during $http request in angular

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Delay loading data in Angular JS

Use this 'ng-cloak' to avoid the undesirable flicker effect caused by the html template display

What you are looking for is ng-cloak.
You have to add it like this:

<body class="{{ bodyClass }}" ng-cloak>

Edit:
It is also advisable to put the snippet below into your CSS file, according to docs.

"For the best result, the angular.js script must be loaded in the head section of the html document; alternatively, the css rule above must be included in the external stylesheet of the application."

[ng\:cloak], [ng-cloak], [data-ng-cloak], [x-ng-cloak], .ng-cloak, .x-ng-cloak {
    display: none !important;
}

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AngularJS strategy to prevent flash-of-unstyled-content for a class

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ngCloak - directive in module ng

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AngularJS: How to prevent “code flash” in page while loading

Thursday, June 8, 2017

Monday, June 5, 2017

Common Mistake #2: Not Having a Dot In There

Sunday, June 4, 2017

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