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@davideast
davideast / index.ts
Created April 15, 2015 17:25
Simple Angular 2 Forms with Firebase
import {bootstrap, Component, Decorator, View, If, For, EventEmitter} from 'angular2/angular2';
import {FormBuilder, Validators, FormDirectives, ControlGroup} from 'angular2/forms';
@Component({
selector: 'app',
injectables: [FormBuilder]
})
@View({
template: `
<div class="container" [control-group]="myForm">
@frozeman
frozeman / createContract.js
Last active September 5, 2018 18:57
Deploy contracts on Ethereum and reliable get the contract address
// -> Soldity
// **********
// Your Soldity contract
event Created(bytes32 indexed identifier);
contract MyContract {
function MyContract(bytes32 identifier) {
Created(identifier);
}
@ethers
ethers / call-then-sendtx-pattern.js
Last active July 24, 2020 05:51
call-then-sendtx pattern for Ethereum Dapps
/*
In Ethereum, a contract can be written so that it returns a value for eth_call.
A Dapp can then check for success or error value of eth_call, before calling eth_sendTransaction,
to take advantage of eth_call effectively being a "preview" of the code flow that the transaction
will take. In traditional client-server, clients can't ask servers beforehand what's going to
happen when the client makes a call; with Dapps contracts can be written so that clients can ask
for a "preview" of what is going to happen, before any funds/ethers are actually utilized
(eth_call does not cost any ethers).
Note: it is possible that in between eth_call and when eth_sendTransaction is actually mined,
@otykhonruk
otykhonruk / seostat.py
Last active November 16, 2015 22:57
Simple SEO-related text metrics.
import re
import sys
from collections import Counter
from pymorphy2 import MorphAnalyzer
morph = MorphAnalyzer()
def words(text):
return re.findall('[а-яА-Яa-zA-Z-]+', text.lower())
@karpathy
karpathy / min-char-rnn.py
Last active July 21, 2025 20:05
Minimal character-level language model with a Vanilla Recurrent Neural Network, in Python/numpy
"""
Minimal character-level Vanilla RNN model. Written by Andrej Karpathy (@karpathy)
BSD License
"""
import numpy as np
# data I/O
data = open('input.txt', 'r').read() # should be simple plain text file
chars = list(set(data))
data_size, vocab_size = len(data), len(chars)
#!/usr/bin/env python3
import nltk
import re
import sys
import json
import string
from nltk.corpus import stopwords
import pymorphy2
def f(diff, n):
"""
This function returns the new difficulty.
"""
period_count = (n + 1) // 100000
return max(diff + 2**(period_count - 1), 5000)
diff = 6232935860523 # starting diffculty
blocknumber = 200000 # starting blocknumber
numberOfBlocks2years = 2*365*24*60*60/15
//Creating a Mongo collection to keep track of events
EthEvents = new Mongo.Collection('ethEvents');
EthEvents.attachSchema(new SimpleSchema({
contractAddress: {
type: String,
index: true
},
eventName: {
type: String,
index: true
@gaearon
gaearon / slim-redux.js
Last active July 22, 2025 06:09
Redux without the sanity checks in a single file. Don't use this, use normal Redux. :-)
function mapValues(obj, fn) {
return Object.keys(obj).reduce((result, key) => {
result[key] = fn(obj[key], key);
return result;
}, {});
}
function pick(obj, fn) {
return Object.keys(obj).reduce((result, key) => {
if (fn(obj[key])) {
@Olegas
Olegas / additional-links.md
Last active April 9, 2017 10:33
Additional links for "Redux for state management" talk