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// SPDX-License-Identifier: GPL-3.0
 
pragma solidity >=0.7.0 <0.9.0;

contract AddressType {
    address public basicAddress = 0xeCc6425dB956125989C2c1a58A817bD90f86B3C0;

    address public basicAddress2 = 0x9Fa413fad794c18fdd3A5Ead5734f042Eb920A20;

    address payable anotherPayableAddress = payable(0x94fe479322fa107933d67b9e230a9B12B6c9a96d);

jensendarren

// SPDX-License-Identifier: GPL-3.0
 
pragma solidity >=0.7.0 <0.9.0;

contract AddressType {
    address public aDefaultAddress;

    // Example of a non checksum address (not allowed by solidity compiler)
    // Can fix using:
    // web3.utils.toChecksumAddress('0xecc6425db956125989c2c1a58a817bd90f86b3c0')

jensendarren

// SPDX-License-Identifier: GPL-3.0
 
pragma solidity >=0.7.0 <0.9.0;
 
contract IntegerType {
   // uint type is same as uint256
   uint256 aUint;
 
   // int type is same as int256
   int256 anInt;

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// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.7.0 <0.9.0;
 
contract BoolType {
    //a basic bool
    bool public aBool;
    
    function notBool() public view returns (bool) {
        return !aBool;

jensendarren

// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.7.0 <0.9.0;
 
contract BoolType {
   bool public aBool;
 
   function notBool() public view returns (bool) {
       return !aBool;
   }

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from decimal import *

#Sets decimal to 10000 digits of precision
getcontext().prec = 10000

def plouffBig(n): #http://en.wikipedia.org/wiki/Bailey%E2%80%93Borwein%E2%80%93Plouffe_formula
    pi = Decimal(0)
    k = 0
    while k < n:
        pi += (Decimal(1)/(16**k))*((Decimal(4)/(8*k+1))-(Decimal(2)/(8*k+4))-(Decimal(1)/(8*k+5))-(Decimal(1)/(8*k+6)))

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/*
Given a list of numbers an a number k, return whether any two number from the list add up to k

For example. given [10,15,3,7] and k of 17 return true sine 10 + 7 is 17.

Bonus can you do in a single pass?
*/

array = [7,15,3,7,8,3,4,100]
k = 23

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How to update your EC2 instance with a new keypair

1. Create a new keypair in AWS Console

2. Start a new temporary recovery EC2 instance

3. Stop the lost keypair instance

4. Detach the EBS drive from the lost keypair instance

jensendarren

<!--Make sure to install @vue/cli-service-global first-->
<!--Serve this up using `vue serve` at the command line-->
<!--Details here: https://cli.vuejs.org/guide/prototyping.html -->
<template>
  <div>
    <h1>{{name}}</h1>
    <b>Logging To Vue Component? <span>{{logging}}</span></b>
    <br />
    <button @click="testLog">Test Log</button>|<button @click="testWarn">Test Warn</button>|<button @click="toggleLogging">Toggle Logging</button>
    <hr/>

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<!--Make sure to install @vue/cli-service-global first-->
<!--Serve this up using `vue serve` at the command line-->
<!--Details here: https://cli.vuejs.org/guide/prototyping.html -->
<template>
  <h1>Hello {{name}}</h1>
</template>

<script>
export default {
  data() {