DEV Community: Peter Haddad

Data Structure cheat sheet

Peter Haddad — Sun, 01 Sep 2024 20:50:22 +0000

Data structure cheat sheet in which I explain in simple terms how to use and implement different data structures and also explain about the different algorithms related to searching and sorting. In the repository i use both Python and Java.

You can find the repository here:

https://github.com/PeterHdd/coding-interview-preparations

Introducing PCER, A CLI Tool

Peter Haddad — Mon, 15 May 2023 18:15:33 +0000

PCER is an NPM CLI tool, which makes it easier for people working in companies with some proxy system to be able to add certificates in thier locally machine.

To use it, all you have to do first:

npm install -g pcer

This would download the latest version, then you can do:

pcer --help

Which would give you the following:

Here you can see all the available commands, if you want to add SSL certificates to ca-bundle.crt, you can first create an alias for it and then easily always reuse it for example:

pcer alias git "C:\Program Files\Git\mingw64\etc\ssl\certs\ca-bundle.crt"
pcer add C:/Users/p.haddad/Downloads/github.crt -l git

This would first create the alias, and then it gets added to ca-bundle.crt file.

You can read more about it here:

https://github.com/PeterHdd/pcer

NextJS with TailwindCSS and Firebase

Peter Haddad — Mon, 24 Apr 2023 21:01:11 +0000

I have created a responsive weather app showcasing the use of NextJS with Tailwind CSS and also using Firebase for storing data in Firestore. You can find the source code here:

Source code: Github Project
Deployment: https://weather-indol.vercel.app/

To get Started

First you would need to create a project in Firebase and then get the firebaseconfig object and add the firebase API keys in the .env.local file. Then you can clone the project here and then execute:

npm install

which would install the NPM packages found in the package.json.

Then you can execute:

npm run dev

which will run the development environment and you can find it in http://localhost:3000

Concepts used

Dynamic Routing
Server side rendering
Tailwind CSS
Mock Data
Firebase

If you find the repository useful, support it by starring it!

Github Repositories

Peter Haddad — Sun, 18 Apr 2021 17:22:53 +0000

Showcase your Github repositories in your static website, including updated stars, forks count! Check the repository here:

https://github.com/PeterHdd/ghrepos

website: https://peterhdd.github.io/ghrepos/

just include the iframe provided in the website, add your Github username, stars condition and you can have a section dedicated to your Github projects in your static website.

Generate getters And Setters

Peter Haddad — Wed, 01 Jan 2020 23:31:10 +0000

https://github.com/PeterHdd/gettersetter

Dart VsCode Extension to automatically generate getters and setters.

Answer: What is the difference between calling the function without parentheses and with parentheses

Peter Haddad — Sat, 28 Dec 2019 15:30:54 +0000

answer re: What is the difference between calling the function without parentheses and with parentheses

Dec 27 '19

_incrementCounter inside onPressed is a function reference, which basically means it is not executed immediately, it is executed after the user clicks on the specific widget.(callback)

_incrementCounter() is a function call and it is executed immediately.

Therefore, inside onPressed you can either pass a function reference or an anonymous function…

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Answer: Update fields in nested objects in firestore documents?

Peter Haddad — Tue, 22 Oct 2019 18:44:15 +0000

answer re: Update fields in nested objects in firestore documents?

Mar 7 '18

According to the link you provided, it says this:

If your document contains nested objects, you can use "dot notation" to reference nested fields within the document when you call update():

Therefore you need to use dot notation to be able to update only one field without overwriting, so like…

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Answer: Catch Firestore error in valueChanges subscription and retry in case of failure

Peter Haddad — Tue, 08 Oct 2019 16:51:40 +0000

answer re: Catch Firestore error in valueChanges subscription and retry in case of failure

Sep 25 '19

The subscribe method contains a second argument incase of error:

Rx.Observable.prototype.subscribe([observer] | [onNext], [onError], [onCompleted])

[observer] (Observer): The object that is to receive notifications.

[onNext] (Function): Function to invoke for each element in the observable sequence.

[onError] (Function): Function to invoke upon exceptional termination of the observable sequence.

[onCompleted] (Function)…

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