Chris Python provides three ways to stop a for loop: The for loop ends naturally when all elements have been iterated over. After that, Python proceeds with the first statement after the loop construct. The keyword break terminates a loop immediately. The program proceeds with the first statement after the loop construct. The keyword continue terminates … Read more
⚔️ Programming Challenge: Given an integer n that could be very high (e.g., n=1000000). How to initialize a Python dictionary of size n that is fast, easy, and efficient? Next, you’ll learn the five main ways to solve this and compare their performance at the end of this article. Interestingly, the winner Method 4 is … Read more
Basic Solution To create a set of n elements, pass a list or another iterable of n initial elements into the set() function. For example, set(range(n)) creates the set of n consecutive integers {1, 2, …, n-1}. You can then add and remove the elements using the normal set methods such as add() or pop(). … Read more
Coding Challenge ⚔️ Challenge: Given an integer d representing the number of digits. How to create a random number with d digits in Python? Here are three examples: my_random(2) generates 12 my_random(3) generates 389 my_random(10) generates 8943496710 I’ll discuss three interesting methods to accomplish this easily in Python—my personal favorite is Method 2! Shortest Solution … Read more
Problem Formulation 💬 Programming Challenge: Given a dictionary where the values are lists of varying sizes. Find and return the shortest list! Here’s an example: Also, you’ll learn how to solve a variant of this challenge. 💬 Bonus challenge: Find only the key that is associated with the shortest list in the dictionary. Here’s an … Read more
There are four major ways to install the Solidity compiler: Install Solidity Compiler via npm Install Solidity Compiler via Docker on Ubuntu Install Solidity Compiler via Source Code Compilation Install Solidity Compiler via Static Binary and Linux Packages In this tutorial, we’ll have a quick look at each of them and give you a link … Read more
Problem Formulation 💬 Programming Challenge: Given a list of lists (nested list). Find and return the shortest inner list from the outer list of lists. Here are some examples: [[1], [2, 3], [4, 5, 6]] 👉 [1] [[1, [2, 3], 4], [5, 6], [7]] 👉 [7] [[[1], [2], [3]], [4, 5, [6]], [7, 8, 9, … Read more
Problem Formulation 💬 Programming Challenge: Given a dictionary where the values are lists of varying sizes. Find and return the longest list! Here’s an example: Also, you’ll learn how to solve a variant of this challenge. 💬 Bonus challenge: Find only the key that is associated with the longest list in the dictionary. Here’s an … Read more
You can check programmatically in Python whether a certain ENS ‘.eth‘ domain name is available by using the urlopen() function from urllib.request module to access the URL ‘https://etherscan.io/enslookup-search?search=example.eth’, replacing the URL suffix ‘example.eth’ with your desired domain. In the following example code snippet, I show how you could check a list of names, one domain … Read more
Quick answer: How to put a simple if-then-else statement in one line of Python code? To put an if-then-else statement in one line, use Python’s ternary operator x if c else y. This returns the result of expression x if the Boolean condition c evaluates to True. Otherwise, the ternary operator returns the alternative expression … Read more
Problem Formulation 💬 Programming Challenge: Given a list of lists (nested list). Find and return the longest inner list from the outer list of lists. Here are some examples: [[1], [2, 3], [4, 5, 6]] 👉 [4, 5, 6] [[1, [2, 3], 4], [5, 6], [7]] 👉 [1, [2, 3], 4] [[[1], [2], [3]], [4, … Read more
The most basic ternary operator x if c else y consists of three operands x, c, and y. It is an expression with a return value. The ternary operator returns x if the Boolean expression c evaluates to True. Otherwise, if the expression c evaluates to False, the ternary operator returns the alternative y. Ternary … Read more