Course source code: https://codistwa.com/guides/data-structures-arrays. More courses on https://codistwa.com

array.py

# ============================================================
# Definition of an array
# ============================================================

empty = []
print(empty)  # []

fruits = ['apple', 'lemon']
print(fruits)  # [ 'apple', 'lemon' ]

# ============================================================
# Content of an array
# ============================================================

numbers = [1, 3, 5, 6]
print(numbers)  # [ 1, 3, 5, 6 ]

fruits = ['apple', 'lemon']
print(fruits)  # [ 'apple', 'lemon' ]

mix = [1, 'apple', 3, True, {'color': 'blue'}]
print(mix)  # [ 1, 'apple', 3, true, { color: 'blue' } ]

# ============================================================
# Access to an item
# ============================================================

fruits = ['apple', 'lemon']
mix = [1, 'apple', 3, True, {'color': 'blue'}]

print(fruits[0])  # apple
print(mix[2])  # 3

# ============================================================
# Methods for an array
# ============================================================

numbers = [1, 3, 5, 6]
mix = [1, 'apple', 3, True, {'color': 'blue'}]

print(mix)  # [1, 'apple', 3, True, {'color': 'blue'}]

print(numbers[2:])  # [5, 6]
numbers.append(1000)
print(numbers)  # [1, 3, 5, 6, 1000]

print(len(numbers))  # 5

# ============================================================
# Multidimensional arrays
# ============================================================

multi_array = [[1, 2, 3, 4], [5, 6, 7]]

print(multi_array[0])  # [ 1, 2, 3, 4 ]
print(multi_array[0][2])  # 3

arrays.js

// ============================================================
// Definition of an array
// ============================================================

const empty = [];
console.log(empty); // []

const fruits = ['apple', 'lemon'];
console.log(fruits); // [ 'apple', 'lemon' ]

// ============================================================
// Content of an array
// ============================================================

const numbers = [1, 3, 5, 6];
console.log(numbers); // [ 1, 3, 5, 6 ]

const fruits = ['apple', 'lemon'];
console.log(fruits); // [ 'apple', 'lemon' ]

const mix = [1, 'apple', 3, true, {color: 'blue'}];
console.log(mix); // [ 1, 'apple', 3, true, { color: 'blue' } ]

// ============================================================
// Access to an item
// ============================================================

const fruits = ['apple', 'lemon'];
const mix = [1, 'apple', 3, true, {color: 'blue'}]

console.log(fruits[0]); // apple
console.log(mix[2]); // 3

// ============================================================
// Methods for an array
// ============================================================

const numbers = [1, 3, 5, 6];
const mix = [1, 'apple', 3, true, {color: 'blue'}]

console.log(mix); // [ 1, 'apple', 3, true, { color: 'blue' } ]
console.log(numbers.slice(2)); // [5, 6]
numbers.push(1000);
console.log(numbers); // [1, 3, 5, 6, 1000]
console.log(numbers.length); // 5

// ============================================================
// Multidimensional arrays
// ============================================================

const multiArray = [[1, 2, 3, 4], [5, 6, 7]];

console.log(multiArray[0]); // [ 1, 2, 3, 4 ]
console.log(multiArray[0][2]); // 3