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List<T> class represents the list of objects which can be accessed by index. 

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. IEnumerable interface is one of the best features of C# language which loops over the collection. 

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<form name="myForm">
    <label>
       User name:
       <input type="text" name="userName" ng-model="user.name" required>
    </label>
      <span class="error" ng-show="myForm.userName.$error.required"> Required!</span>
    <label>
       Last name:
       <input type="text" name="lastName" ng-model="user.last" ng-minlength="3" ng-maxlength="10">
    </label>

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https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage

// Save data to sessionStorage
sessionStorage.setItem('key', 'value');

// Get saved data from sessionStorage
let data = sessionStorage.getItem('key');

// Remove saved data from sessionStorage
sessionStorage.removeItem('key');

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https://docs.angularjs.org/api/ng/service/$compile

// compile the new DOM and link it to the current
// scope.
// NOTE: we only compile .childNodes so that
// we don't get into infinite loop compiling ourselves
 
 $compile(element.contents())(scope);

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https://www.tutlane.com/tutorial/angularjs/angularjs-apply-function

$scope.$apply(function () {
  //Your Code.
});

Different ways to use '$apply()'
1. 
  $scope.$apply(function () {
    $scope.val1 = 'tutlane.com';

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https://www.ecma-international.org/publications/files/ECMA-ST/Ecma-262.pdf

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Isolating scope is recommend for passing data between custom directive and its parent scope to prevent unintentionally changing the parent scope.

https://medium.com/@tpstar/angularjs-custom-directive-and-isolated-scope-how-to-pass-data-to-and-from-directive-scope-dd0bc8096bf9

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https://docs.mongodb.com/manual/tutorial/install-mongodb-on-windows/

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https://github.com/chrisyip/koa-pug#basedir

basedir
If you encounter this error, Error: the "basedir" option is required to use "extends" with "absolute" paths, try to set basedir like this:

const pug = new Pug({
  viewPath: 'path/to/views',
  basedir: 'path/for/pug/extends'
})