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@Koze
Koze / PhotosCameraRoll.m
Last active Feb 3, 2018
Getting Camera Roll with Photos.framework
View PhotosCameraRoll.m
PHFetchResult *result = [PHAssetCollection fetchAssetCollectionsWithType:PHAssetCollectionTypeSmartAlbum
subtype:PHAssetCollectionSubtypeSmartAlbumUserLibrary
options:nil];
PHAssetCollection *assetCollection = result.firstObject;
NSLog(@"%@", assetCollection.localizedTitle);
// Camera Roll
@dsemenovsky
dsemenovsky / getConfirmations.js
Created Jun 1, 2018
Get Ethereum transaction confirmations count
View getConfirmations.js
async function getConfirmations(txHash) {
try {
// Instantiate web3 with HttpProvider
const web3 = new Web3('https://rinkeby.infura.io/')
// Get transaction details
const trx = await web3.eth.getTransaction(txHash)
// Get current block number
const currentBlock = await web3.eth.getBlockNumber()
View watchTokenTransfers.js
function watchTokenTransfers() {
// Instantiate web3 with WebSocketProvider
const web3 = new Web3(new Web3.providers.WebsocketProvider('wss://rinkeby.infura.io/ws'))
// Instantiate token contract object with JSON ABI and address
const tokenContract = new web3.eth.Contract(
TOKEN_ABI, process.env.TOKEN_CONTRACT_ADDRESS,
(error, result) => { if (error) console.log(error) }
)
@tuncbahcecioglu
tuncbahcecioglu / auth_twitter_login.js
Created Dec 14, 2012
node.js oauth example: logins to twitter, displays user name
View auth_twitter_login.js
// https://gist.github.com/1964797
var express = require('express');
var sys = require('util');
var oauth = require('oauth');
var app = express();
var _twitterConsumerKey = 'sLNC1nUodJom3L8BNL4iHA';
var _twitterConsumerSecret = 'EcO8Iiv5M8R0qeLVbHAi2cm9uX4Fp1jPODnoGfqUEro';
View Swift Atomic Operators.swift
import Foundation
infix operator +=! { associativity right precedence 90 } // Int32 or Int64
infix operator -=! { associativity right precedence 90 } // Int32 or Int64
postfix operator ++! {} // Int32 or Int64
postfix operator --! {} // Int32 or Int64
infix operator |=! { associativity right precedence 90 } // UInt32
infix operator &=! { associativity right precedence 90 } // UInt32
@dsemenovsky
dsemenovsky / confirmEtherTransaction.js
Created Jun 1, 2018
Confirm Ethereum transaction
View confirmEtherTransaction.js
function confirmEtherTransaction(txHash, confirmations = 10) {
setTimeout(async () => {
// Get current number of confirmations and compare it with sought-for value
const trxConfirmations = await getConfirmations(txHash)
console.log('Transaction with hash ' + txHash + ' has ' + trxConfirmations + ' confirmation(s)')
if (trxConfirmations >= confirmations) {
// Handle confirmation event according to your business logic
@chriseth
chriseth / 0 README.md
Last active Jul 24, 2020
Formal verification for re-entrant Solidity contracts
View 0 README.md

This gist shows how formal conditions of Solidity smart contracts can be automatically verified even in the presence of potential re-entrant calls from other contracts.

Solidity already supports formal verification of some contracts that do not make calls to other contracts. This of course excludes any contract that transfers Ether or tokens.

The Solidity contract below models a crude crowdfunding contract that can hold Ether and some person can withdraw Ether according to their shares. It is missing the actual access control, but the point that wants to be made

@berzniz
berzniz / NSObject+Debounce.h
Created Jan 25, 2014
Debounce method for Objective C
View NSObject+Debounce.h
@interface NSObject (Debounce)
- (void)debounce:(SEL)action delay:(NSTimeInterval)delay;
@end
@joshj
joshj / server.js
Created Feb 28, 2012 — forked from jeffrafter/server.js
Twitter OAuth with node-oauth for node.js+express
View server.js
/*
Node.js, express, oauth example using Twitters API
Install Node.js:
curl -0 http://nodejs.org/dist/v0.6.11/node-v0.6.11.tar.gz
tar -zxf node-v0.6.11.tar.gz
cd node-v0.6.11
./configure
make
make install
View watchEtherTransfers.js
function watchEtherTransfers() {
// Instantiate web3 with WebSocket provider
const web3 = new Web3(new Web3.providers.WebsocketProvider('wss://rinkeby.infura.io/ws'))
// Instantiate subscription object
const subscription = web3.eth.subscribe('pendingTransactions')
// Subscribe to pending transactions
subscription.subscribe((error, result) => {
if (error) console.log(error)