charleslukes

{
 "type": "module",
 "dependencies": { },
  "devDependencies": {
      "webpack": "^5.87.0",
      "webpack-bundle-analyzer": "^4.9.0",
      "webpack-cli": "^4.10.0",
      "webpack-dev-server": "^4.15.1",
  }, 

charleslukes

const oldEvents = async () => {
    // get current block 
    const currentBlock = await api.rpc.chain.getHeader();
    const currentBlockData = currentBlock.toJSON();
    // By default a Polkadot/Substrate node will only keep state for the last 256 blocks, unless it is explicitly run in archive mode
    for (let index = 0; index < 255; index++) {
    const blockNum = currentBlockData.number - (index + 1);
    const blockHash = await api.rpc.chain.getBlockHash(blockNum);
    const apiAt = await api.at(blockHash.toJSON());
    const events = await apiAt.query.system.events();

charleslukes

Setting up Webpack for any Typescript project from Scratch

Welcome to step by step hands-on guide to setup webpack in your upcoming typescript project. Please follow the steps and you should be able to create your own webpack project. Please download the source code from github.

You will learn below things:

1. ✅Create a Typescript node.js project.
2. ✅Install Dependencies with webpack & typescripts.
3. ✅Use Webpack CLI to crate webpack.config.js file and modify webpack.config.js based on our need.

charleslukes

SIMPLE GREETER PROJECT

This is a contract that 

1. SET AND GETS Owners name
2. say hello with Owners name. 

charleslukes

let num = [0,8,-2,5,0];
let val = 0;

const startAndEndOfVal = (numArr: Array<number>, val: number) => {
   let indexes = numArr.sort().reduce((acc: Array<number>, cur: number, index: number) => {
        if(cur === val){
            acc.push(index)
        }
        return acc
    }, []);

charleslukes

/**
 * A simple calculator project implementing the add numbers method
 */

//Add method
function addNumber (...arg) {
  let calculator = 0;
  if(arg.length === 0){
    throw new Error('The input cannot be empty');
  }

charleslukes

/**
 * A simple calculator project implementing the add numbers method
 */

//Add method
function addNumber (...arg) {
  let calculator = 0;
  if(arg.length === 0){
    throw new Error('The input cannot be empty');
  }

charleslukes

describe('addNumbers method ', () => {
  it('Should contain atleast one input ', () => {
    expect(addNumber(1,2)).toBe(3);
    expect(addNumber(1)).toBe(1);
  });
  it('Should throw an error is user doesnt input value ', () => {
    expect(addNumber).toThrow();
  })
  it('Should return the sum of numbers in the arguments ', () => {
    expect(addNumber(1,3)).toBe(4);

charleslukes

function addNumber (...arg) {
  let calculator = 0;
  if(arg.length === 0){
    throw new Error('The input cannot be empty');
  }
  for (let index = 0; index < arg.length; index++) {
    if(typeof arg[index] !== 'number'){
      return 'Input must be a number';
    } 
    calculator += arg[index];

charleslukes

describe('addNumbers method ', () => {
  it('Should contain atleast one input ', () => {
    expect(addNumber(1,2)).toBe(3);
    expect(addNumber(1)).toBe(1);
  });
  it('Should throw an error is user doesnt input value ', () => {
    expect(addNumber()).Throw();
  })
  it('Should return the sum of numbers in the arguments ', () => {