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Using Angular 8 I have the following on my HTML:

<span>{{post.category || '-'}}</span>

If post.category is empty a dash will be displayed. This is working.

But I have other 2 situations a little

<span>{{post.createdAt || '-' | date: 'yyyy-MM-dd'}}</span>. 

<span>{{post.classification || '-'}} points</span>

If createdAt has no value the dash is not displayed ... I know it is because of the pipe.

And if classification has no value 'points' is still displayed ... I know it is because points is outside '-'.

How can I solve this?

Could a pipe be created for this?

If you want a formatted date if it exists you could surround the post.createdAt | date:'yyyy-MM-dd' with parens. Something like this.

<span>{{ (post?.createdAt | date:'yyyy-MM-dd') || '-' }}</span>

Typing and User Input Processing, The DataTable provides a configurable input processing system that can accept, reject or apply a default value when an input is provided. It can be configured to� The Dashboard feature must be enabled by an administrator before you can select the dashboard as the project default page. Restriction: You can only add dashboards to projects, not to sites or to their containers. Right-click on a project in the navigation tree and go to Configure > This Container. The Container Setup Wizard window appears.

Simplest Solution is using ng-template

<span *ngIf="post.createdAt else dash">
  {{post.createdAt | date: 'yyyy-MM-dd'}}

<ng-template #dash>

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If you want to show - sign when there is no data, then you can use ternary ? operator:

<span>{{post.category ? post.category : '-'}}</span>

As mdn says:

The conditional (ternary) operator is the only JavaScript operator that takes three operands: a condition followed by a question mark (?), then an expression to execute if the condition is truthy followed by a colon (:), and finally the expression to execute if the condition is falsy. This operator is frequently used as a shortcut for the if statement.

Set default values for fields or controls - Access, When you set a default value for a table field, any controls that you bind to that field will display the default value. Set a default value. In the Navigation Pane, right-� When you provide values for properties of the template's layout, these values will be used as the defaults in any figure that this template is applied to. Here is an example that creates a template that sets the default title font to size 24 Rockwell, and then constructs a graph object figure with this template.

Try this,

check for the value if it exists pass it to pipe other wise display the default icon.

<span>{{ post?.createdAt ? (post?.createdAt | date:'yyyy-MM-dd') : '-' }}</span>

Template functions - string, String functions for ARM templates The output from the preceding example with the default values is: The following examples show how to use guid to create a unique value for commonly used levels. The following example template shows how to remove all dashes from the user-provided string, and� accompanied by a new major version of dash. If you’ve been using DataTable with dash v0.x / dash-table v3.x, check out the Dash 1.0 Migration Guide for the full list of changes. Otherwise, check out DataTable in the docs below. If you make something cool with it, we’d love to see it! Share it on the community forum! – chriddyp

The most simple solution, i think is:

<span *ngIf="post?.createdAt">{{post.createdAt | date: 'yyyy-MM-dd'}}</span> 
<span *ngIf="!post?.createdAt">-</span>

<span *ngIf="post?.classification">{{post.classification}} points</span>
<span *ngIf="!post?.classification">-</span>

Nunjucks template, abs; batch; capitalize; center; default(value, default, [boolean]); dictsort; dump; escape (aliased If you wanted to simply display a variable, you would do: set items = [1,2,3,4,5,6] %} {% set dash = joiner("-") %} {% for item in items | batch(2) � value (string | number | list of string | numbers; optional): The value of the input. If multi is false (the default) then value is just a string that corresponds to the values provided in the options property. If multi is true, then multiple values can be selected at once, and value is an array of items with values corresponding to those in

Live template variables - Help, When you expand a live template abbreviation, its variables either appear as Specify the default value for cases when the expression fails to evaluate Converts a string into lower case and inserts n-dashes as separators. The list above is in order of specificity: values.yaml is the default, which can be overridden by a parent chart's values.yaml, which can in turn be overridden by a user-supplied values file, which can in turn be overridden by --set parameters. Values files are plain YAML files. Let's edit mychart/values.yaml and then edit our ConfigMap template.

General Settings, The active template determines how your LearnDash elements Enabled by default on all new LearnDash installations of version 3.0 or as well as LearnDash widgets that display course & quiz information. If you don't know what the REST API is, you can leave these settings at their default values. Dash is Python framework for building web applications. It built on top of Flask, Plotly.js, React and React Js. It enables you to build dashboards using pure Python. Dash is open source, and its apps run on the web browser. In this tutorial, we introduce the reader to Dash fundamentals and assume that they have prior experience with Plotly.

Flow Control, A quick overview on the flow structure within templates. Helm Show Chart � Helm Show Readme � Helm Show Values � Helm Status � Helm Template � Helm Test Values.favorite.drink | default "tea" | quote }} food: {{ . (with the dash and space added) indicates that whitespace should be chomped left, while -}} means � The template platform supports sensors which get their values from other entities.. Configuration. The configuration of Template Sensors depends on what you want them to be. Adding the following to your configuration.yaml file will create two sensors, one for the current sun angle and one for the time of the next sunri

  • Can't a directive or maybe pipe be created for this? I think maybe a directive to be applied to span. something like: <span defaultValue="post.createdAt;'-'"</span> ... I am looking for something more reusable.
  • you are already using pipe and I think for above use case, ng-template is the recommended approach.