leelakrishna

/**
 * Takes a camel cased identifier name and returns an underscore separated
 * name
 *
 * Example:
 *     camelToUnderscores("thisIsA1Test") == "this_is_a_1_test"
 */
def camelToUnderscores(name: String) = "[A-Z\\d]".r.replaceAllIn(name, {m =>
  "_" + m.group(0).toLowerCase()
})

mzaradzki

exports.handler = (event, context, callback) => {
    
    // WARNING :
    // This snippet assumes : event.Records[0].eventName == 'ObjectCreated:Put'
    // but the ful code deals with both 'ObjectCreated:Put' and 'ObjectRemoved:Delete'
    
    var filename = event.Records[0].s3.object.key;
    var bucketname = event.Records[0].s3.bucket.name;
    
    var params = {

leelakrishna

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

rmetzger

[cloudera@quickstart build-target]$ klist
Ticket cache: FILE:/tmp/krb5cc_501
Default principal: hdfs@CLOUDERA

Valid starting     Expires            Service principal
08/30/15 05:15:22  08/31/15 05:15:22  krbtgt/CLOUDERA@CLOUDERA
	renew until 09/06/15 05:15:22
[cloudera@quickstart build-target]$ export HADOOP_CONF_DIR=/usr/lib/hadoop/etc/hadoop/
[cloudera@quickstart build-target]$ ./bin/yarn-session.sh -n 1
05:15:37,483 INFO  org.apache.hadoop.yarn.client.RMProxy                         - Connecting to ResourceManager at quickstart.cloudera/127.0.0.1:8032

ryanfitz

var AWS = require('aws-sdk');

exports.handler = function(event, context) {
    var cloudsearchdomain = new AWS.CloudSearchDomain({endpoint: 'doc-dev-cinch-accounts-ltmqj5gt5mjb5hg5eyqaf2v5hu.us-east-1.cloudsearch.amazonaws.com'});

    var documents = event.Records.map(function(record) {
        var data = {id : record.dynamodb.Keys.id.S};
        
        if (record.eventName === 'REMOVE') {
            data.type = 'delete'

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

avilches

import java.security.*;
public class Sha {
    public static String hash256(String data) throws NoSuchAlgorithmException {
        MessageDigest md = MessageDigest.getInstance("SHA-256");
        md.update(data.getBytes());
        return bytesToHex(md.digest());
    }
    public static String bytesToHex(byte[] bytes) {
        StringBuffer result = new StringBuffer();
        for (byte byt : bytes) result.append(Integer.toString((byt & 0xff) + 0x100, 16).substring(1));

pauldix

require 'benchmark'
require 'rubygems'
require 'json'
require 'yaml'
include Benchmark

benchmark_iterations = 1
large_single_dimension_array = [42, 123.123] * 5000
large_single_dimension_hash  = {}
10000.times do |i|