GIT : How to discard all local changes within a branch ?


-- force discard —
git reset --hard origin/<davidBranch_name>

example with the master branch

git reset --hard origin/master

What do you verify before deploying your code ?

vendor/bin/phpcs --standard=PSR2 --colors -p src/ && vendor/bin/phpunit --stop-on-failure  

PSR-2 Code Styling

This command returns all PSR-2 (code styling errors)

vendor/bin/phpcs --standard=PSR2 ~/directory_to_scan

vendor/bin/phpcs –standard=PSR2 –colors -pv src/ApiBundle

with more information

This command fix all fixable PSR-2 (code styling errors) issues

vendor/bin/phpcbf --standard=PSR2 --report=json ~/directory_to_scan

Run the Functional and Unit Tests

vendor/bin/phpunit –stop-on-failure


What are Twitter Card ideal dimension ? 800px by 418px

  • The ideal image size for Twitter Cards is 800px by 418px, a 1.91:1 ratio. For App Cards, you can go with 800px by 800px for a 1:1 ratio.
  • Videos can also be used in Twitter Cards. The recommended size for Website Card videos is 1200px by 1200px, or 1:1 aspect ratioFor App Card and Direct Message Card, the recommended size is 640px by 360px for a 16:9 ratio, or 360px by 360px for a 1:1 ratio.
  • Twitter supports images that are JPEG or PNG format; no GIFs are allowed here.
  • For best results, make sure your image is no larger than 3 MB.
  • The approved file types are MP4 or MOV, ideally less than 30 MB in size, and no more than 1 GB when it comes to videos.
  • Twitter advises a short video for these cards, so aim to keep it less than 15 seconds.
  • For videos, place your logo in the upper left-hand corner.
  • All Website Card videos are required to have closed captioning or text overlays.

source :


PHPUnit, how to stop on failure ?

Find below the command that exit out phpunit ghracefully when a first error pop out=

phpunit --stop-on-failure
phpunit David Raleche
phpunit David Raleche

How to get the exponent symbol (^) ?

well just copy it below :



How to story point your project ? Fibonacci Sequence

0, 1, 2, 3, 5, 8, 13, 21, 34

This is the Fibonacci Sequence to use when updating your story points

1 – Easy (1-2 days)

2 – Medium (1-2 days)

3 – Hard (3-5 days)

5- Very hard (3-8 days)

8 – Difficult (8-12 days)

13 – Very difficult (8-15 days)

General Technical

How to define latency in computer science ? ?

Latency is the delay between a user’s action and a web application’s response to that action, often referred to in networking terms as the total round trip time it takes for a data packet to travel.

How to reduce latency

Content Delivery Network (CDN) providers provide customers with private networks that allow them to bypass the public internet. Therefore, these private networks reduce latency by providing more efficient paths for data packets to travel on.

Also the caching techniques is resolving the latency issue

How Latency Works

Consider that you are buying a product through an online shop and you press the “Add to Cart” button for a product that you like.

The chain of events that occur when you press that button are as follow :

  1. Firstly, You press the “Add to Cart” button.
  2. Secondly, The browser identifies this as an event and initiates a request to the website’s servers. The clock for latency starts now.
  3. Thirdly, The request travels to the site’s server with all the relevant information.
  4. Then, The site’s server acknowledges the request. The first half of the latency is complete.
  5. The server accept the request status.
  6. The site’s server replies to the request with relevant information.
  7. The request reaches your browser and in the card the system adds the product. With this, the latency cycle is completed.

The latency is the time that it takes for all these events to complete.




How to find the RAM memory ?

Many times you have to figure out the RAM memory on a server or your laptop let’s say. it works with a Macbook. The easiest way is to open a terminal and execute the following command

free -h

unix logo
unix logo

How to find the microprocessor speed ?

Here is the command to find the microprocessor speed in unix machine. MacOs is a unix machine so you can run the following command :


unix logo
unix logo
API General Web API

How to improve an API speed performance ?

Today’s challenge : investigate the slow responsiveness of the api. I was assigned the task to investigate the performance report produced the day before. The report concluded in the most unclear manner that the backend was lacking in term of performance. No precision regarding the list of failing api calls was provided. I used newRelic and discovered that indeed during the specific timeframe mentioned a clear bottleneck was surfacing an a specific api call to a specific internal server.

I reached out to the developer mainly responsible of this server. The newRelic information [pointing out the entanglement] was challenged in the most defensive and almost aggressive manner to my stupefaction.

Developer do not like to be pointed out or criticized. What/How should have approach this developer ?=

The developer challenged the results by saying “I just executed the specified api endpoint with the specified payload and guess what; the result came back under one second”. Omitting the context of Heavy Test Performance. So being pushed back multiple time, I moved on to the sysOp department to get more information on what was going on.

The slow server obviously was not monitored with newRelic. A coordination with sysOp was necessary to get this server under surveillance. During our meeting, it was established that the server was under provisioned in term of CPU power and memory space. We did increase these metrics.

The tests were ran and passed successfully. The main challenges were to get the approval from the CIO to have sysOp moving and the developer’s resistance to acknowledge a possible glitch on the server.

My approach toward this developer although very specific and data documented should have been persuasive rather than convincing.