Julie  Donnelly

Julie Donnelly


Matrix Multiplication, Signals, and Convolutions

Matrix multiplication, signals, and convolutions

  • 00:00:00 – Week 5 – Practicum
  • 00:00:28 – Table of contents
  • 00:01:13 – Matrix multiplication recap
  • 00:15:13 – Natural signals
  • 00:21:17 – Extension to natural signals
  • 00:36:49 – Playing with IPython and PyTorch

#deep-learning #data-science #developer #artificial-intelligence #python

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Matrix Multiplication, Signals, and Convolutions

William Hill


Signal Clone: How to Create a Messaging App Like Signal in 2021?

It is known that Signal is a free instant messaging application that is available on Android, iOS, and desktop platforms. It offers encrypted voice & video calls and text messaging features. Even though it was founded in 2010, it is named Signal in 2014. Since 2014, it has been an open-source messaging platform.

This blog is for you if you plan to enter into the mobile app industry with the Signal clone app. It will explain why you should invest in the Signal clone app and the basic features to concentrate on while developing the Signal like app

Read on to get insightful information.

Reasons to develop a real-time messaging app like Signal in 2021

Since 2020, the Signal app has become more familiar to people and it has witnessed many downloads significantly. Last year, WhatsApp came up with a new privacy policy and many concerns were raised. 

People need an alternative app to WhatsApp that should be a highly reliable and secure instant messaging app. At that time, Elon Musk (the CEO of Tesla) wrote “Use Signal” on Twitter in January 2021. These are the major reasons many people shifted towards the Signal app. 

Notably, the Signal app’s encryption protocol hides the metadata (messages) and reduces the probability of hacking. In fact, there is no chance of data leakage. Also, it conceals the location details of the users. 

Since 2016, Signal's source code is open, so it is easy to develop & launch a similar app in the market. To get your app noticed by target users, you have to focus on a business model, smooth user experience, and marketing strategy. 

Concerning data privacy, the demand for a secure messaging app is skyrocketing in 2021. Therefore, it is the right time to launch an excellent real-time messaging app. 

Essential features to include in the Signal clone app

Signal Private Messenger is known for its data privacy. Therefore, consider including the features that are incorporated in Signal. Below are the must-have features to consider while developing a modern messaging app.

  • Push notification

This feature notifies the user about important information like incoming messages, received files, missed voice/video calls. Thereby, it helps to improve user engagement. 

  • Encryption

End-to-end encryption is a vital feature for a real-time instant messaging application. This ensures that the messages (metadata) are safe and secure. However, hackers find it difficult to hack data. 

  • Geolocation

The Geolocation feature enables the users to share their current location with their friends or family members when they are outside of their homes. 

  • Temporary messages

This feature will allow the users to delete the message when the receiver has seen the message. Like, setting a time limit for the messages. It is up to the users choice to enable or disable this feature.

Apart from these, you can add the voice/video call feature. Including this feature in the messaging app is a big plus. Notably, the user base of your app increases if you incorporate sticker and emoji features. The mentioned features are the basics for the messaging app. You must try some new features if you want to stand out from your app competitors.

Bottom line

We all know that the demand for Signal arises to a great extent when WhatsApp has updated its privacy policy. So, there is no wonder that users are moving to a secure and reliable real-time messaging app. 

Signal being the privacy-focused messaging app, you can consider developing a similar app and launch it in 2021 as demand for such apps is high now. 

Signal clone script is a real-time app solution that empowers entrepreneurs to launch their own app instantly. It is a 100% customizable solution with the white-labeling ability that makes it modifiable depending on the business needs. Go ahead with the Signal clone app development

#signal clone #signal clone app #develop an app like signal #signal clone app development #signal like app

I am Developer


Multiple File Upload in Laravel 7, 6

in this post, i will show you easy steps for multiple file upload in laravel 7, 6.

As well as how to validate file type, size before uploading to database in laravel.

Laravel 7/6 Multiple File Upload

You can easily upload multiple file with validation in laravel application using the following steps:

  1. Download Laravel Fresh New Setup
  2. Setup Database Credentials
  3. Generate Migration & Model For File
  4. Make Route For File uploading
  5. Create File Controller & Methods
  6. Create Multiple File Blade View
  7. Run Development Server


#laravel multiple file upload validation #multiple file upload in laravel 7 #multiple file upload in laravel 6 #upload multiple files laravel 7 #upload multiple files in laravel 6 #upload multiple files php laravel

I am Developer


Laravel 7 Multiple Image Upload with Preview

Here, i will show you how to upload multiple image with preview using ajax in laravel.

Laravel 7 Ajax Multiple Image Upload with Preview

Just follow the below steps and upload multiple images using ajax with showing preview in laravel applications:

  • Install Laravel Fresh Setup
  • Setup Database Credentials
  • Create Route
  • Generate Controller By Command
  • Create the blade view
  • Start Development Server


#laravel multiple image upload with preview #laravel multiple image validation #display multiple images in laravel #laravel multiple file upload #multiple image upload in laravel 6 #ajax image upload and preview with laravel

Seamus  Quitzon

Seamus Quitzon


Php how to delete multiple rows through checkbox using ajax in laravel

First thing, we will need a table and i am creating products table for this example. So run the following query to create table.

CREATE TABLE `products` (
 `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
 `name` varchar(255) COLLATE utf8mb4_unicode_ci NOT NULL,
 `description` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,
 `created_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP,
 `updated_at` datetime DEFAULT NULL,

Next, we will need to insert some dummy records in this table that will be deleted.

INSERT INTO `products` (`name`, `description`) VALUES

('Test product 1', 'Product description example1'),

('Test product 2', 'Product description example2'),

('Test product 3', 'Product description example3'),

('Test product 4', 'Product description example4'),

('Test product 5', 'Product description example5');

Now we are redy to create a model corresponding to this products table. Here we will create Product model. So let’s create a model file Product.php file under app directory and put the code below.


namespace App;

use Illuminate\Database\Eloquent\Model;

class Product extends Model
    protected $fillable = [

Step 2: Create Route

Now, in this second step we will create some routes to handle the request for this example. So opeen routes/web.php file and copy the routes as given below.


Route::get('product', 'ProductController@index');
Route::delete('product/{id}', ['as'=>'product.destroy','uses'=>'ProductController@destroy']);
Route::delete('delete-multiple-product', ['as'=>'product.multiple-delete','uses'=>'ProductController@deleteMultiple']);

#laravel #delete multiple rows in laravel using ajax #laravel ajax delete #laravel ajax multiple checkbox delete #laravel delete multiple rows #laravel delete records using ajax #laravel multiple checkbox delete rows #laravel multiple delete

I am Developer


Laravel 7.x/6 Multiple Image Upload Ajax

Here, i will share with you how to multiple image upload in laravel 7, 6 using ajax. And display preview of multiple images before upload in laravel.

Multiple Image Upload With Preview in Laravel 7/6 using Ajax

Upload multiple images using ajax with preview in laravel 7/6 by following the below steps:

  1. Install Laravel Fresh Setup
  2. Setup Database Credentials
  3. Create Multiple Image Upload Route
  4. Generate Image Controller By Command
  5. Create Multiple Image Upload Preview blade view
  6. Start Development Server


#ajax multiple image upload and preview with laravel #multiple image upload in laravel 6 #laravel multiple image upload with preview #upload multiple images ajax jquery laravel #laravel multiple image validation