Enrico's world

domenica, gennaio 07, 2024

Name of brackets in programming language

martedì, febbraio 28, 2023

Code Completion in IntelliJ IDEA on Mac

The shortcut for code compeletion for intelliJ IDEA in MacOS is:
Ctrl+Option+Space

lunedì, febbraio 27, 2023

Coin Change Problem (Dynamic Programming)

youtube
I've asked to chatGPT why dp[i] +=dp[i-coin]

In point 2), we consider the case where we use the coin c to make change for the amount i. In this case, we can use the same number of possible combinations as we could for the amount i-c to make change for the amount i. Let me give you an example to illustrate this. Suppose we have the coins [1, 2, 5] and we want to make change for the amount 7. To compute the number of possible combinations of coins required to make change for the amount 7 using the coins up to 5, we can do the following: We start with dp[0] = 1, since there is only one way to make change for 0 (using no coins). We consider the first coin 1. For each amount i from 1 to 7, we check whether we can use the coin 1 to make change for the amount i. If we can, we update dp[i] by adding the value of dp[i-1] to it, since we can use one 1 coin and the number of possible combinations required to make change for the amount i-1 to make change for the amount i. For example, to make change for the amount 2, we can use one 1 coin and the number of possible combinations required to make change for the amount 1. Therefore, we update dp[2] by adding dp[1] to it. After considering the first coin, we have dp = [1, 1, 1, 1, 1, 1, 1]. We consider the second coin 2. For each amount i from 2 to 7, we check whether we can use the coin 2 to make change for the amount i. If we can, we update dp[i] by adding the value of dp[i-2] to it, since we can use one 2 coin and the number of possible combinations required to make change for the amount i-2 to make change for the amount i. For example, to make change for the amount 3, we can use one 2 coin and the number of possible combinations required to make change for the amount 1. Therefore, we update dp[3] by adding dp[1] to it. After considering the second coin, we have dp = [1, 1, 2, 2, 3, 3, 4]. We consider the third coin 5. For each amount i from 5 to 7, we check whether we can use the coin 5 to make change for the amount i. If we can, we update dp[i] by adding the value of dp[i-5] to it, since we can use one 5 coin and the number of possible combinations required to make change for the amount i-5 to make change for the amount i. For example, to make change for the amount 6, we can use one 5 coin and the number of possible combinations required to make change for the amount 1. Therefore, we update dp[6] by adding dp[1] to it. After considering the third coin, we have dp = [1, 1, 2, 2, 3, 4, 5].

lunedì, ottobre 03, 2022

Delete a Recovery Services Vault in Microsoft Azure

youtube link

martedì, dicembre 07, 2021

AZ - 204 Microsoft Azure Developer Associate - Links

Here my certificate on credly.

git - deleting all the local branches but dev

$ git branch | grep -v "dev" | xargs git branch -D

sabato, febbraio 13, 2021

Exam AZ-900: Microsoft Azure Fundamentals - links

martedì, novembre 24, 2020

git - How to replace master branch in Git, entirely, from another branch?

stackoverflow

giovedì, marzo 12, 2020

How to get out of projector mode (Win 7) - black screen

I was stuck on windows reboot, after having tried to connect my windows laptop to a projector.
I could see just black screen, it was scaring.

Solution: Hold [Windows key] + P
source

domenica, febbraio 02, 2020

Uninstall Logitech GHUB from Mac

Delete the G Hub application from /Applications
Trash the entire folder lghub at ~/Library/Application Support/
Trash ~/Library/Application Support/Logitech/Gaming/ghubDevices.json
Trash settings.json from that same folder

Source

domenica, gennaio 05, 2020

default spring security in spring-boot app

If you include this dependency in your pom:

groupId: org.springframework.boot
artifactId: spring-boot-starter-security

you "inherited" the default spring security.
When you application starts, have a look to this message:

Using generated security password: 03219696-3a8d-49d5-8385-11e84fe94ac8

Then if the login mask shows up:

Type this:

user: user
password: that password in the message...

martedì, settembre 10, 2019

Issue with wireless Ubuntu 18.04 - board QCA6174

Issue: Wifi gets disconnected automatically
Context: wi-fi - QCA6174 802.11ac / Ubuntu 18.04
Solution: I have applied a workaround based on this solution: https://support.killernetworking.com/knowledge-base/wi-fi-issues-with-1435-1535-1525-on-debian-ubuntu-and-arch/

Workaround:

Replace the folder /lib/firmware/ath10k/QCA6174/hw3.0 with the corresponding from https://github.com/kvalo/ath10k-firmware/tree/master/QCA6174/hw3.0
rename firmware-4.bin_WLAN.RM.2.0-00180-QCARMSWPZ-1 to firmware-6.bin