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To get the index item of an array in an Ember.js view, you can use the built-in {{each}} helper provided by Ember's templating system.
Here's an example of how you can achieve this in an Ember.js view:
- In your view's template file, you can use the {{each}} helper to iterate over the array:
{{#each model as |item index|}}
In this example, model is the array you want to loop over. The as |item index| syntax allows you to access each item in the array along with its index.
- The index variable will hold the index of each item in the array, which you can then use as needed within the {{each}} block.
By using this approach, you can access the index of each item in the array and display it within your view.
What is the Ember.js approach to obtain the index of an item in an array in a view?
In Ember.js, you can obtain the index of an item in an array within a view by using the @index property.
The @index property is a built-in contextual helper that is automatically provided within the {{#each}} block in a template. It represents the current index of the item being rendered within the iteration.
Here's an example usage:
{{#each model as |item index|}}
In this example, model is an array containing items. Within the {{#each}} block, item represents the current item being iterated, and index represents the index of that item.
How can I retrieve the index of an element in an array within an Ember.js view?
You can retrieve the index of an element in an array within an Ember.js view by using the @index keyword.
Here's an example:
// app/components/array-view.js import Component from '@glimmer/component';
export default class ArrayViewComponent extends Component { array = ['apple', 'banana', 'cherry'];
getWithIndex(index) { return `${this.array[index]} - ${index}`; } }
{{#each this.array as |item index|}}
In this example, the ArrayViewComponent defines an array called array with three elements: 'apple', 'banana', and 'cherry'.
Within the array-view.hbs template, we use the each helper to iterate over each element in the array. The index variable gives us the index of each element in the array, which we can pass to the getWithIndex helper function that returns the item value along with its index.
The rendered output will be:
Each paragraph displays the item value along with its index retrieved using {{this.getWithIndex index}}.
How to retrieve the position of a particular element in an array in Ember.js view?
In Ember.js, you can retrieve the position of a particular element in an array in a view by using computed properties.
Here's an example of how you can achieve this:
- Start by defining an array in your Ember.js view, which contains the elements you want to work with. Let's assume the array is called items:
items: ['apple', 'banana', 'orange', 'grapes'],
- Declare a computed property in your view, which retrieves the position of a particular element in the array. You can use the indexOf method to find the index of an element in the array:
itemPosition: Ember.computed('items', function() { let items = this.get('items'); let targetElement = 'orange'; // element whose position you want to find return items.indexOf(targetElement); }),
- Now, you can access the position of the element in the array in your view template by referring to the computed property:
The position of orange is {{itemPosition}}.
This will display "The position of orange is 2." in your view template since "orange" is at index 2 in the items array.
Remember to replace 'orange' with the actual element you want to find the position of.