Pratica di Shadowing: Array Map in 100 Seconds - Impara a parlare inglese con i video
Creazione lezione...
1
ArrayMap.
2
Create a new array by calling a function on every element in a different array.
3
Imagine we have an array of squares.
4
We can call a function on every single one of those
5
squares using map to convert it to a new array of circles.
6
In other words, it's just a loop, where the goal of that loop is to create a new array.
7
In our code, let's start with an array of objects that contain some user data.
8
Our goal is to take this array of objects
9
and convert it to an array of strings that only contain the user names.
10
You could do this imperatively by creating a new empty array, then use a for loop to push each individual username to the new array.
11
Notice how we're using statements to change the app's state.
12
This is known as imperative programming.
13
Map on the other hand is declarative and describes how to create this new array using a function.
14
The new array is equal to the original array mapped to a function.
15
The function is passed as an argument to map, and it's called on every element in the original array.
16
The function has access to the current element in the loop as well as its index.
17
In the body of the function, your job is to compute a new value and then return it.
18
And we've now solved the same problem we did with the for loop, but with less code and without mutating the internal state.
19
If you're a ReactJS user, you'll often see Map used to take some initial data and then map it to JSX for the actual UI.
20
Or maybe you need these usernames to do something asynchronously like fetch additional data from the database.
21
You could do that by mapping them all to an array of promises, then running them concurrently with promise.all.
22
One anti-pattern to be aware of with map is
23
that you should only use it if you plan on using the new array.
24
If you just need to run a loop, consider for each, or a regular for loop instead.
25
This has been ArrayMap in 100 seconds, thanks for watching, and I will see you in the next one.
📺 Stesso Canale
B21
10 very promising Open Source Projects you haven’t heard of
American Accent, en-USUniversity Students+2
B21
7 Programming myths that waste your time
American Accent, en-USUniversity Students+2
C15
The plan to break apart Google... RIP Chrome
American Accent, en-USUniversity Students+3
C11
DHH has gone completely off the rails...
American Accent, en-USUniversity Students+2
C12
DNS Explained in 100 Seconds
American Accent, en-USUniversity Students+2
B23
Anthropic begged the world to stop AI… then shipped this
American Accent, en-USUniversity Students+2
B22
One man just liberated Fable... and now it’s illegal
American Accent, en-USUniversity Students+2
B22
7 Things No Programmer Ever Wants to Hear
American Accent, en-USBusiness English+1
B21
80% of programmers are NOT happy… why?
American Accent, en-USUniversity Students+2
C14
The most interesting hack in history just got weirder...
American Accent, en-USUniversity Students+2
B24
Raspberry Pi Explained in 100 Seconds
American Accent, en-USUniversity Students+2
C12
Did Google just kickstart the intelligence explosion?
American Accent, en-USUniversity Students+3
C13
Tragic mistake... Anthropic leaks Claude’s source code
American Accent, en-USUniversity Students+2
C1100+ Docker Concepts you Need to Know
American Accent, en-USUniversity Students+2
C17
When open-sourcing your code goes wrong...
American Accent, en-USUniversity Students+2
C129
Docker in 100 Seconds
American Accent, en-USUniversity Students+2
C13
The mystery is solved... and the answer is 40x cheaper than Claude
American Accent, en-USUniversity Students+2
B28
An ex-OpenAI researcher just deleted language from the LLM...
American Accent, en-USUniversity Students+2
B29
25 crazy software bugs explained
American Accent, en-USUniversity Students+2
B29
Git Explained in 100 Seconds
American Accent, en-USUniversity Students+2
✨ Video consigliato
C11
130 frasi
► 2. СВОЙСТВА МАССИВОВ. Функции автозаполнения | Курс по Numpy.
University StudentsBusiness English+1
C112
47 frasi
Essence of linear algebra preview
American Accent, en-USUniversity Students+2
C13
257 frasi
Learn Next.js Parallel Routes In 16 Minutes
University StudentsBusiness English+1
C11
132 frasi
Video
University StudentsBusiness English+1
C11
333 frasi
Master n8n Triggers in 20 Minutes – Automate Anything
University StudentsBusiness English+1
C11
689 frasi
Database Sharding! Designing Data-Intensive Applications chapter 6
University StudentsBusiness English+1
C12
172 frasi
DRY Often Makes Your Code Worse
University StudentsBusiness English+1
C11
197 frasi
Unreal Engine 5.8 - Experimental MCP Server Support Walkthrough | State of Unreal 2026
University StudentsBusiness English+1
B22
37 frasi
How to Make a Mind Map - The Basics
University StudentsBusiness English+1
C11
177 frasi
Mini Project - Implementing a Simple Web Identity Federation Application
University StudentsBusiness English+1
Informazioni su questa lezione
Cos'è la tecnica dello Shadowing?
Shadowing è una tecnica di apprendimento delle lingue supportata da studi scientifici, originariamente sviluppata per la formazione dei traduttori professionisti e resa popolare dal poliglotta Dr. Alexander Arguelles. Il metodo è semplice ma potente: ascolti un audio in inglese di madrelingua e lo ripeti immediatamente ad alta voce — come un'ombra che segue il parlante con un ritardo di solo 1–2 secondi. A differenza dell'ascolto passivo o degli esercizi di grammatica, lo shadowing costringe il tuo cervello e i muscoli della bocca a elaborare e riprodurre simultaneamente i modelli di discorso reale. La ricerca dimostra che migliora significativamente la precisione della pronuncia, l'intonazione, il ritmo, il discorso connesso, la comprensione dell'ascolto e la fluidità del parlato — rendendolo uno dei metodi più efficaci per la preparazione alla prova di speaking dell'IELTS e per la comunicazione reale in inglese.