How to Iterate Over an Array Collection View In Ember.js?

In Ember.js, you can iterate over an array collection view using the {{#each}} helper in the template. This allows you to dynamically render the elements of the array.

To iterate over an array collection view, follow these steps:

1. In your template file (typically with the .hbs extension), use the {{#each}} helper to define the iteration. {{#each collection as |item|}} {{/each}}
2. Replace collection with the name of your array collection. Each element of the array will be assigned to the variable item within the iteration block.
3. Inside the {{#each}} block, you can access the current item and perform any desired rendering or logic.

For example, to display some properties of each item in a list, you can use:

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<ul>
   {{#each collection as |item|}}
       <li>{{item.property1}}</li>
       <li>{{item.property2}}</li>
   {{/each}}
</ul>

In this example, collection represents your array of data objects, and property1 and property2 represent properties of each item within the array.

By using the {{#each}} helper, you can dynamically render each element of the array collection view without the need for manually managing the iteration.

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How do I pass parameters to each item in an array collection view in Ember.js?

In Ember.js, if you want to pass parameters to each item in an array collection view, you can make use of the {{each}} helper and iterate over the collection while passing the desired parameters.

Here's an example of how you can achieve this:

1. Define your array in the controller or component:

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items: [
  { name: "Item 1", param: "Param 1" },
  { name: "Item 2", param: "Param 2" },
  { name: "Item 3", param: "Param 3" }
]

1. Use the {{each}} helper in the template to iterate over the items array:

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{{#each items as |item|}}
  {{my-component name=item.name param=item.param}}
{{/each}}

1. Create a component (in this example my-component) where you can access the name and param properties:

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// my-component.js
import Component from '@ember/component';
import { computed } from '@ember/object';

export default Component.extend({
  // Property to access the 'name' parameter
  name: null,
  
  // Property to access the 'param' parameter
  param: null,
  
  // Example computed property based on the passed parameter
  uppercaseName: computed('name', function() {
    return this.name.toUpperCase();
  })
});

1. Use the passed parameters within the component's template:

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<!-- my-component.hbs -->
<div>
  Name: {{name}}
  <br>
  Parameter: {{param}}
  <br>
  Uppercase Name: {{uppercaseName}}
</div>

Now, when the {{each}} helper iterates over the items array, it will create an instance of the my-component component for each item, passing the corresponding name and param properties. You can access and use these parameters within the component as needed.

What is the Ember.js convention for iterating over an array collection view?

In Ember.js, the convention for iterating over an array in a collection view is to use the {{#each}} helper. Here's an example of how it can be used:

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{{#each model as |item|}}
  <div>{{item}}</div>
{{/each}}

In this example, model refers to the array of items that you want to iterate over. The {{#each}} helper iterates over each item in the array and creates a <div> element for each item with the value of item rendered inside.

You can also access the index of each item by using the {{#each}} helper with block arguments:

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{{#each model as |item index|}}
  <div>{{index}}: {{item}}</div>
{{/each}}

In this case, index will be the index of the current item being iterated over in the array.

What is the purpose of the #each helper in Ember.js when iterating over an array collection view?

The purpose of the #each helper in Ember.js is to iterate over an array or collection view and render a template block for each item in the array. It is commonly used to display a list of items dynamically.

The #each helper takes an array as an argument and performs the iteration. Inside the template block, you have access to each item in the array and can render them using Ember's template syntax.

For example, you may have an array of users and want to display their names in a list. You can use the #each helper to iterate over the array and render the names:

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{{#each users as |user|}}
  <li>{{user.name}}</li>
{{/each}}

In this example, the template block <li>{{user.name}}</li> will be rendered for each item in the users array, displaying each user's name in a list.