Python for Two Arrays - TypeScript

In this post, we'll take a look at how to work with two arrays in Python and TypeScript. We'll cover basic array operations, such as concatenating, slicing, manipulating and iterating.

Basic array operations in Python

Let's start by creating two arrays in Python using the list syntax:

array1 = [1, 2, 3]
array2 = [4, 5, 6]

Concatenating arrays

To concatenate the two arrays, we can use the + operator:

concatenated_array = array1 + array2
print(concatenated_array)  # prints [1, 2, 3, 4, 5, 6]

Slicing arrays

To extract a range of elements from an array, we can use slicing. Slicing works like this: array[start:end].

sliced_array = array1[1:3]
print(sliced_array)  # prints [2, 3]

Modifying arrays

We can modify individual elements in an array by accessing them through their index and assigning a new value:

array1[1] = 42
print(array1)  # prints [1, 42, 3]

Looping over arrays

To iterate over an array, we can use a for loop:

for element in array1:
    print(element)

Basic array operations in TypeScript

Let's switch to TypeScript and create two arrays of numbers:

const array1: number[] = [1, 2, 3];
const array2: number[] = [4, 5, 6];

Concatenating arrays

To concatenate two arrays in TypeScript, we can use the concat() method:

const concatenatedArray = array1.concat(array2);
console.log(concatenatedArray);  // prints [1, 2, 3, 4, 5, 6]

Slicing arrays

To slice an array in TypeScript, we can use the slice() method:

const slicedArray = array1.slice(1, 3);
console.log(slicedArray);  // prints [2, 3]

Modifying arrays

To modify an individual element in an array in TypeScript, we can access it through its index and assign a new value:

array1[1] = 42;
console.log(array1);  // prints [1, 42, 3]

Looping over arrays

To iterate over an array in TypeScript, we can use a for...of loop:

for (const element of array1) {
    console.log(element);
}

Conclusion

In this post, we've covered some basic array operations in Python and TypeScript. Arrays are a fundamental data structure in programming and understanding how to work with them is key to writing effective code.