| var answerHash = '0xdb81b4d58595fbbbb592d3661a34cdca14d7ab379441400cbfa1b78bc447c365'; | |
| // iterate through all possible uint8 | |
| for (var i = 0; i < 2 ** 8; i++) { | |
| var hex = i.toString(16); | |
| var padUint8 = web3.padLeft(hex, 2); | |
| var hash = web3.sha3(padUint8, {encoding: 'hex'}); | |
| if (hash == answerHash) { | |
| console.log(`Found: ${i}`); | |
| break; |
| // construct contract object with ABI | |
| var abiDefinition = [{"constant":false,"inputs":[{"name":"n","type":"uint8"}],"name":"guess","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[],"name":"isComplete","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[],"payable":true,"stateMutability":"payable","type":"constructor"}]; | |
| var GuessTheNumberChallenge = web3.eth.contract(abiDefinition); | |
| // load from deployed contract. replace the address with yours | |
| var challenge = GuessTheNumberChallenge.at("0xb13afE1D0195a5C7876eE3e297a06A50b6f847A8"); | |
| // call `guess` function | |
| challenge.guess(42, {value: web3.toWei(1, 'ether')}, console.log); |
| var abiDefinition = [{"constant":false,"inputs":[{"name":"nickname","type":"bytes32"}],"name":"setNickname","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"name":"","type":"address"}],"name":"nicknameOf","outputs":[{"name":"","type":"bytes32"}],"payable":false,"stateMutability":"view","type":"function"}]; | |
| var CaptureTheEther = web3.eth.contract(abiDefinition); | |
| // load from deployed contract. replace the address with yours | |
| var cte = CaptureTheEther.at("0x71c46Ed333C35e4E6c62D32dc7C8F00D125b4fee"); | |
| // call `setNickname` function | |
| cte.setNickname("your name", console.log); |
| // construct contract object with ABI | |
| var abiDefinition = [{"constant":false,"inputs":[],"name":"callme","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"isComplete","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"}]; | |
| var CallMeChallenge = web3.eth.contract(abiDefinition); | |
| // load from deployed contract. replace the address with yours | |
| var challenge = CallMeChallenge.at("0xf70218870AD13c7b57a01B95cF86a6D137088aE3"); | |
| // call `callme` function | |
| challenge.callme(console.log); |
| # install solidity on Mac | |
| brew update | |
| brew upgrade | |
| brew tap ethereum/ethereum | |
| brew install solidity | |
| brew linkapps solidity | |
| # compile solidity contract | |
| cat << EOF | solc - --abi | |
| pragma solidity ^0.4.21; |
| // get accounts managed by Metamask | |
| var account; | |
| web3.eth.getAccounts((err, acc) => {account = acc[0]}); | |
| console.log(account); | |
| // get balance | |
| web3.eth.getBalance(account, (err, balance) => { | |
| console.log(web3.fromWei(web3.toDecimal(balance), 'ether')) | |
| }); |
| Verifying my Blockstack ID is secured with the address 1BQroEmkps4bRv2Z5bwhamsDAwjTVo4tJW https://explorer.blockstack.org/address/1BQroEmkps4bRv2Z5bwhamsDAwjTVo4tJW |
| ```{r} | |
| area <- function(x) UseMethod("area", x) | |
| rectangle <- function(a, b) { | |
| structure(list(a = a, b = b), class = "rectangle") | |
| } | |
| area.rectangle <- function(x) { | |
| x$a * x$b | |
| } |
| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <title>Superformula</title> | |
| <style> | |
| path { | |
| stroke-width: 1.5px; | |
| stroke: #666; | |
| fill: #ddd; | |
| } |
The tree layout implements the Reingold-Tilford algorithm for efficient, tidy arrangement of layered nodes. The depth of nodes is computed by distance from the root, leading to a ragged appearance. Cartesian orientations are also supported. Implementation based on work by Jeff Heer and Jason Davies using Buchheim et al.'s linear-time variant of the Reingold-Tilford algorithm. Data shows the Flare class hierarchy, also courtesy Jeff Heer.
Compare to this Cartesian layout.