Homebrew is a free and open-source software package management system that simplifies the installation of software on Apple's operating system, macOS, as well as Linux. The name is intended to suggest the idea of building software on the Mac depending on the user's taste.

What Does Homebrew Do?

• Homebrew installs the stuff you need that Apple (or your Linux system) didn’t.

• It makes installing lots of different software like Git, Ruby, and Node simpler.

• It lets you avoid possible security problems associated with using the sudo command to install the software.

• To install, drag this icon… no more. Homebrew Cask installs macOS apps, fonts and plugins and other non-open source software.

Prerequisites

• You should have some familiarity with the Mac Terminal application since you’ll need to use it to install Homebrew. The Terminal application is located in the Utilities folder in the Applications folder. Alternatively, you can press ⌘ + space to open up the spotlight & search for the terminal.

• Dependencies. You need to install one other piece of software before you can install Homebrew:

• Xcode. Install Apple’s Xcode development software: Xcode in the Apple App Store.

How to Install Homebrew

• Open the Terminal app & type either one of these commands:

•   /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
  
    # OR
    # If you want to run the Homebrew installer non-interactively without prompting for passwords (e.g. in automation scripts), you can use:
    NONINTERACTIVE=1 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
  

• The interactive script explains what it will do and then pauses before it does it. Read about other installation options.

How to Update Homebrew

New versions of Homebrew come out frequently, so make sure you update it before updating any of the other software components that you’ve installed using Homebrew.

• In Terminal type brew update

•   /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/uninstall.sh)"
  
    # & If you want to run the Homebrew uninstaller non-interactively, you can use: 
    NONINTERACTIVE=1 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/uninstall.sh)"
  

How to Uninstall Homebrew

• Open the Terminal app

• ```bash /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/uninstall.sh)"

#If you want to run the Homebrew uninstaller non-interactively, you can use:
NONINTERACTIVE=1 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/uninstall.sh)"
```

• This downloads and runs the uninstaller script. Follow the instructions and Homebrew will be removed from your computer.

Last but not least, refer to this official github page for latest information about how to install & uninstall Homebrew.

• non-PTA iPhone

• Jazz SIM - that you use primarily

• Zong SIM - optional

I have been a Mobilink/Jazz user for years now & I use only 1 SIM. My iPhone is meant to be used for a couple of months so I don't have to register it with PTA. I thought it would be simple enough but it so happened that this iPhone won't pick up any Jazz SIMs. Now, I don't want a new SIM so I searched for an alternative & found out that you can get an eSIM for your primary Jazz contact number.

Disclaimer: An eSIM is basically the exact same thing as a standard SIM except that you don't need a physical SIM. Instead, the company gives you a code which you can scan & add it to your phone. Remember that not all phones support eSIM & not all networks offer eSIM. And, Jazz is one of those companies which offer it.

I went to Jazz franchise & they told me I have to convert my pre-paid SIM to post-paid & it would cost 2000 rupees, RS 1000 for the eSIM & RS 1000 security. The representative told me that there'll be two biometrics on two different days which was a deal breaker for me so I changed my plan & instead went to a Zong franchise & converted my SIM from Jazz to Zong. This is how it went:

• I sent a message to 667 with the message MNP

• I received a reply with some sensitive gibberish which I FORWARDED to 76313

After this, the representative wrote some numbers on a hand-sized machine & took my fingerprints. I paid him RS 200 & he handed me the SIM.
He also gave me these instructions:

• The SIM will be converted within 24 hours

• When the old Jazz SIM loses it's signal that means the Zong SIM is now ready.

• When the new SIM have signals, I should dial *10# which would do some necessary things.

I hope this helps!

Best,

Junaid

Ubuntu 18.04 comes pre installed with python version 3 & 2. To check those two, write python or python3 in your terminal.

junaid@johnny:~$ python

Python 2.7.17 (default, Nov 7 2019, 10:07:09)
[GCC 7.4.0] on linux2
Type “help”, “copyright”, “credits” or “license” for more information.
>>>

junaid@frt-eh:~$ python3

Python 3.6.9 (default, Nov 7 2019, 10:44:02)
[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>

How to install softwares from tar/tgz files (.tar.gz or simply .tar)

[What is a tar.gz File, and How Do I Open It?
A tar file, often called a tarball, is a collection of files wrapped up in one single file for easy storage. Rather…www.howtogeek.com](https://www.howtogeek.com/362203/what-is-a-tar.gz-file-and-how-do-i-open-it/ "https://www.howtogeek.com/362203/what-is-a-tar.gz-file-and-how-do-i-open-it/")

https://www.digitalocean.com/community/tutorials/how-to-install-python-3-and-set-up-a-programming-environment-on-ubuntu-18-04-quickstart

https://hackersandslackers.com/multiple-versions-python-ubuntu/

[How to Upgrade to Python 3.7 on Ubuntu 18.04/18.10
Disclaimer Edited: 2020-03-10 15:54:45 UTC Instead of using below method please consider adding a new/multi python…tech.serhatteker.com](https://tech.serhatteker.com/post/2019-09/upgrade-python37-on-ubuntu18/ "https://tech.serhatteker.com/post/2019-09/upgrade-python37-on-ubuntu18/")

[How to Upgrade to Python 3.7 on Ubuntu 18.04/18.10
Disclaimer Edited: 2020-03-10 15:54:45 UTC Instead of using below method please consider adding a new/multi python…tech.serhatteker.com](https://tech.serhatteker.com/post/2019-09/upgrade-python37-on-ubuntu18/ "https://tech.serhatteker.com/post/2019-09/upgrade-python37-on-ubuntu18/")

Virtual Environment & pip

https://uoa-eresearch.github.io/eresearch-cookbook/recipe/2014/11/26/python-virtual-env/

[How to Install Pip on Ubuntu 18.04
Pip is a package management system that simplifies installation and management of software packages written in Python…linuxize.com](https://linuxize.com/post/how-to-install-pip-on-ubuntu-18.04/ "https://linuxize.com/post/how-to-install-pip-on-ubuntu-18.04/")

How to create Django project

Note: commands containing 3 are recommend because they use python 3 & all.

[Starting a Django Project - Real Python
Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design. In this…realpython.com](https://realpython.com/django-setup/ "https://realpython.com/django-setup/")

1. check (python -V or python3 -V) & install your python version (if necessary)
2. install pip and/or pip3
   sudo apt -y install python-pip
   sudo apt -y install python3-pip
3. instal virtualenv
   sudo pip install virtualenv sudo pip3 install virtualenv
   or venv
   ***sudo apt install python3-venv***
4. create virtual env to for you app (create a directory & execute in that folder)
   virtualenv my-project-env virtualenv -p /usr/bin/python2.7 .venv **using venv **python3 -m venv my-project-env
5. activate virtual env
   source my-project-env/bin/activate
6. create django project (the actual application which will contain our views & controllers & all)
    — — rest of the steps coming soon — —

helpful links:

[How to Create Python Virtual Environments on Ubuntu 18.04
Python virtual environment is a self-contained directory tree that includes a Python installation and number of…linuxize.com](https://linuxize.com/post/how-to-create-python-virtual-environments-on-ubuntu-18-04/ "https://linuxize.com/post/how-to-create-python-virtual-environments-on-ubuntu-18-04/")

[How to install virtualenv on Ubuntu 18.04
We may face issues when our Linux distribution only offers certain versions of Python and its packages, when we…dev.to](https://dev.to/serhatteker/how-to-install-virtualenv-on-ubuntu-18-04-2jdi "https://dev.to/serhatteker/how-to-install-virtualenv-on-ubuntu-18-04-2jdi")

This tip is for those learners who already know what spread & rest operators are but sometimes are unclear when one is being used.

When we see "..." in the code, it is either rest parameters or the spread operator.

There’s an easy way to distinguish between them:

• When ... is at the end of function parameters, it’s “rest parameters” and gathers the rest of the list of arguments into an array. I also like it call it the receiving end.
• When ... occurs in a function call or alike, it’s called a “spread operator” and expands an array into a list.

The very first time that I paired my watch to Mi Fit iOS app it was easy and I had no problems but one day, after an update app logged me out and I had to login and connect the watch again. Frankly it took some time as, even though it was showing me that I have previously paired a watch but it kept saying “Bring the watch closer”. Long story short I was able to connect after few tries.

Now few weeks or maybe updates later the same phenomenon occurred but this time it took me around 40 minutes to finally resolve the issue. Here is what I did.
First I followed the steps given on this official amazfit support entry but I wasn’t successful then I just factory reset my watch and tried pairing like I did the very first time & it worked. Good luck to you, I wish I have helped in any way.

import {Directive, ElementRef, HostListener, Input} from '@angular/core';

*/**
* Generated class for the PasswordToggleDirective directive.
*
* See https://angular.io/api/core/Directive for more info on Angular
* Directives.
*/
*@Directive({
selector: '[passwordToggle]' *// Attribute selector
*})
export class PasswordToggleDirective {
@Input('appTargetInput') targetInput: any;

constructor(el: ElementRef) {
}

@HostListener('click') onMouseEnter() {
let inType = (this.targetInput._native.nativeElement.type == 'text')? 'password': 'text';
this.targetInput._native.nativeElement.type = inType;
}

}

Usage:

<ion-item no-margin no-padding class="clear-item-inner">
    <ion-label>
        <ion-icon name="md-lock"></ion-icon>
    </ion-label>
    <ion-input #toggleInput formControlName="password" class="half-inp half-border-inp" type="password" placeholder="Password"></ion-input>

    <button class="showhidePass" color="light" ion-button             type="button" clear item-end passwordToggle     [appTargetInput]="toggleInput">
    <ion-icon name="eye"></ion-icon>
    </button>
</ion-item>

Pass template reference variable to ‘appTargetInput’ of passwordToggle directive. I have passed it toggleInput which is the reference variable for ion-input above it.

OwlCarousel StagePadding

Setup:

$('.owl-carousel').owlCarousel({
stagePadding: 50,
loop:true,
margin:10,
nav:true,
responsive:{
0:{
items:1
},
600:{
items:3
},
1000:{
items:5
}
}
})

HTML

Also check out this official owlCarousel demo