This is part 2 of the “Lottery as a Smart Contract” series. In part 1, I described the business logic behind the Lottery Smart Contract. Here, I will demonstrate how this contract is executed. To run this, you will need: Remix, the Solidity IDE here. Metamask wallet with 2 accounts that have some ETH in
Writing a lottery contract is a great way to learn important Smart Contract concepts such as State, Event and Visibility. In this 3 part series, I will describe the logic and codes behind a Lottery Smart Contract. In developing my Lottery Contract, I used Oraclize, a data carrier service that executes external JSON web services. Motivation
Like how new recruits in the army are required to do a few pull-ups before lunch, I make myself complete at least 2 Codility challenges a week. If nothing, it helps to keep the mind thinking algorithmically – which I believe is a good thing. This challenge requires one to cycle through a series of
The 2nd Codility lesson is to search for the odd number of elements in an array that cannot be paired with any other element. Codility provided this example. A[0] = 9, A[1] = 3, A[2] = 9 A[3] = 3, A[4] = 9, A[5] = 7 A[6] = 9 Apart from A[5], every other element has
Codility is where programmers receive programming tests as interview questions. This is also where programmers could learn to code. I am at lesson 1 on Iterations, and here’s my answer. It finds the binary gap of a number. A binary gap is the longest sequence of 0 of a number converted to binary. For example,
