How to filter duplicates in ng repeat in AngularJS?
This tutorial will show you how you can filter out duplicates when using the ng-repeat directive in AngularJS. We’ll pass an array of JSON objects and filter based on several different things within each object. We’ll start with a very simple angular controller that will have a list of element names, some of which are duplicates.
Table of Contents
How to add a parameter to the ng-click function?
In this case, ng-click fully gets what it expects, ie: ng-click=”removeTask (5)”. However… it’s not doing anything. Of course I can write code to get task.id from the $tasks array or even from the DOM, but this doesn’t seem to be the angular way. So how can dynamic content be added to the ng-click directive inside an ng-repeat loop?
How to use hint to update Ng replay in Java?
You can use track by ($index + ‘:’ + row) so that it updates individual emails every time their data is updated, as well as when a new item is added, without tripping over duplicates – Hashbrown Jan 7 at 7 :42 For those expecting JSON and still getting the same error, be sure to parse your data: Crazy.
Need data binding for ng click?
It is not necessary to use data binding, as in { {}}. Also worth noting, for people who find this in their searches, this is… Note the value of ng-click. The parameter passed to goTo() is a string of a property of the binding object (the button), but it is not enclosed in quotes.
How to repeat two rows in a table in angular?
This article describes how to repeat two rows for an element using the angular directive, ng-repeat-start: The easiest way to create a table in Canvas is to use the angular ng-repeat directive. In a table, ng-repeatis will repeat a row or a column for elements.
How does ng repeat start work in HTML?
The ng-repeat-start directive works the same as ng-repeat, but it will repeat all HTML code (including the tag in which it is defined) up to and including the final HTML tag where ng-repeat-end is placed. In our example, we use ng-repeat-start to create a first row with the product description and a small graphic.
Can you repeat more than one row in a table?
In a table, ng-repeat will repeat one row or one column per element. If you don’t have a lot of space on your board, displaying too much information in one row can seem too squashed:
What is an example of ngrepeat in AngularJS?
For example, if an element is added to the collection, ngRepeat will know that all other elements already have DOM elements and won’t reprocess them. All the different types of trace functions, their syntax, and their support for duplicate elements in collections can be found in the description of the ngRepeat expression.
How does ng repeat startdirective work in AngularJS?
The ng-repeat-start directive works the same as ng-repeat, but it will repeat all of the HTML code (including the tag it’s set in) up to the final HTML tag where ng-repeat-en was placed. The following example makes use of this feature:
How to repeat a series of elements in AngularJS?
To repeat a series of elements instead of just a parent element, ngRepeat (as well as other ng directives) supports repeater range extension by defining explicit start and end points using ng-repeat-start and ng-repeat- end, respectively.
How to filter duplicates in an array in Java?
The following examples take an input array of objects or primitive types into an array, remove duplicate elements from an array, return the new array with no duplicates. if an array contains primitive types it is very easy to filter out duplicates if an array contains objects we need to filter out duplicates based on key value pair equal validation.
How to use a pipe filter in angular?
I am trying to implement pipes using Angular. Below is the code I have tried. I want to retrieve unique for the entire list. So I’ve added a pipe filter name for the inner list. But I keep getting the duplicate items. I have added the json for reference. The inner ArticleTags array holds a list of objects.
How to filter JSON objects in angular controller?
We’ll pass an array of JSON objects and filter based on several different things within each object. We’ll start with a very simple angular controller that will have a list of element names, some of which are duplicates. Next, we’ll introduce our index file that we’ll use to display our simple list.
Where can I find unique key filter in angular?
You can use angular UI which has single filter defined. The source can be found here. So you can do something like this… Not the answer you’re looking for? Browse other questions tagged angularjs filter unique unique-key ng-repeat or ask your own question.
Can you use order by and filter in AngularJS?
The built-in filters orderBy and filter do not work with objects and will throw an error if used with one. If you run into any of these limitations, the recommended workaround is to convert your object to an array that sorts in whatever order you prefer before providing it to ngRepeat.
How to hide or show a record of an NG replay?
Approach 1: Here the tr element is visible only if the expression bound to ng-show is true. Here ng-hide is commented out in the example, but it works the same way as ng-show.
How to iterate over filtered collection of objects in AngularJS?
Now, inside that AngularJS function, since the alias variable contains values of only those objects that were filtered, we iterate over each of those values. For each iteration, we change some property like in this case the grades of the students filtered by 10 and then console the values.
How to iterate over filtered collection of objects?
The task is to iterate over a collection of objects already filtered by ng-repeat filters and after clicking a button, change some property of only those objects that were filtered. Suppose you have a collection of objects that were filtered by a text search within a title property on each object.
How to validate dynamically created inputs using ng-repeat, ng-show?
If you are using other directives in conjunction, be careful that they don’t have the “terminal” property set, otherwise this function won’t be able to execute (since it has a priority of -1).
How to filter by multiple property in AngularJS?
Note that we are using the creiteria object to keep adding the user-typed values, we first use the filter in HTML to filter by property, so our ngRepeat will be like this:
When to use comparer in filter in AngularJS?
Comparator used to determine whether the values retrieved using the expression (when not a function) should be considered a match based on the expected value (of the filter expression) and the actual value (of the object in the array).
When to use ngrepeatcan instead of ngoptionsattribute?
The ngOptions attribute can be used to dynamically generate an item list for the element using the array or object obtained by evaluating the ngOptions comprehension expression. In many cases, ngRepeat can be used on elements instead of ngOptions to achieve a similar result. However, ngOptions does offer some benefits:
Why doesn’t ngoptionsaddition work with ngmodel?
A different problem with objects or collections is that ngModel will not detect if a property of the object or an element of the collection changes. For that reason, ngOptions additionally watches the model using $watchCollection, when the expression contains a track by clause or the selection has the multiple attribute.
When to use track by clause in ngoptions?
Another solution is to use a track by clause, because then ngOptions will track the element’s identity not by reference, but by the result of the track by expression. For example, if the items in your collection have an id property, you would track them by item.id.
How to combine two lists with only unique values?
Hi, I’m looking to merge two dynamic lists in Excel and create a merged list with no duplicates, only unique values. It doesn’t matter how List 3 is sorted as long as it contains only the unique values. I don’t want to use VBA. I hope there is a formula I can use. Please help! Use =EDATE(A2,1) for a month later.
Can you write ng if in Angular 4?
Angular 4+ has updated its ng if capabilities, it is now more developer friendly. You can write if, else and then in html directly. Angular 2 ng if and Angular js 1 ng-if are almost the same except for some syntax changes. Let’s see how it is in Angular 4 with some examples.
What is the difference between angular 2 and angular 4?
Angular 2 ng if and Angular js 1 ng-if are almost the same except for some syntax changes. Let’s see how it is in Angular 4 with some examples. You can handle many scenarios like this in html and it’s one of the great advantages of Angular 4.