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I have a very hard time understanding the following explanation from Twitter's Effective Scala https://twitter.github.io/effectivescala/:

While Scala allows these to be omitted, such annotations provide good documentation: this is especially important for public methods. Where a method is not exposed and its return type obvious, omit them. This is especially important when instantiating objects with mixins as the scala compiler creates singleton types for these. For example, make in:

I am going through Higher-kinded types & ad-hoc polymorphism section of twitter's Scala School and I don't understand and can't find reference anywhere to a unary type. Here is the context of the usage:

For example, whereas “unary types” have constructors like List[A], meaning we have to satisfy one “level” of type variables in order to produce a concrete types (just like an uncurried function needs to be supplied by only one argument list to be invoked), a higher-kinded type

I am using an typeahead.js from https://github.com/twitter/typeahead.js

I managed to get the field populated and style them using template options by following the examples provided.

I would like to be able to clear the selection using an icon in the inputbox like below

I am trying to implement Bootstrap Typeahead to eventually use an Elasticsearch instance I have, but I cannot even get the basic example to work in Django (2.2.6). I am taking the majority of this code from the examples page. Here is the HTML I am using:

typeahead.html

Where does Finatra search for the files? When I write

I'm using typeahead.js to create a simple dropdown list.

The user should be able to use the down key to scroll through suggestions, and be able to use the mouse to select a suggestion. The suggestions should be appropriately highlighted in either of these scenarios.

The problem I'm having is achieving the above without highlighting both hovered states AND when scrolling using the down/up arrows.

This can be seen clearly in the gif below.

To highlight hovered states I'm using:

I've been messing around with typeahead.js templates. No matter what I do, I keep getting the following error:

Uncaught TypeError: this.displayText(...).toLowerCase is not a function in typeahead.min.js:2

My JavaScript looks as following:

I am trying to use twitter typeahead.js in my laravel app. It doesn't work (no error, but nothing appear under my field).

So I decided to to a simple html file with just the librairies and the examples (https://twitter.github.io/typeahead.js/examples/) to test. And this doesn't work either.

I'm going crazy :/ Is there something obvious I don't see ?

This is my code :

Hi I'm trying to use typeahead to show the info from my local DB (Mysql) using nodejs and express but it's not working

I already tried using this tutorial https://codeforgeek.com/ajax-search-box-using-node-mysql/ but it's not working and I don't know what else i can do

createSesions.js