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A frictionless solution for cumbersome process Yo aims to simplify communication. In this new experimental product we focus on removing friction from polling. Removing friction means more transactions: Lower Friction -> Higher Conversion = More Transactions There is a real problem in the world of polling. Response rates are declining as “ ” a consequence of busier lives and greater mobility, but also technology that makes it easier for people to ignore phone calls coming from unknown telephone numbers. As Slate points out, “ ” if such polls aren’t reaching a representative subset of the populace, it’s hard to know what to believe. But what if we reduce the hurdle of replying to polls? Hypothesis As technology advances we have more ways to perform things we’ve been doing for years, like polling. Today, more than a year since iOS 8 has been released, we present the first solution that allows participating in polls without even having to unlock your phone. iOS 8 introduced Interactive Notifications . One can swipe the notification and reveal 2 buttons. Yo Polls is an where there is no need to open the app in order to use it, the interaction is through interactive notifications. invisible app The friction in participating in a Yo Poll is minimal. It takes about 4 seconds. This lets us get a high response rate and in . real time Snapshot of public opinion at a point in time. “A real time pulse of what is going through the nation’s head” — Jay Z Check out Yo Polls here: http://yopolls.co Business Inquiries: polls@justyo.co Thanks to for contributing to this post. Matt Hartman

Yo Polls — Real-time frictionless polls

Understanding blockchain requires to understand many other disparate parts: peer-to-peer network, proof of work, cryptographic hash, consensus algorithm, decentralized architectures, double-spending, mining, unspent transaction output, wallets, distributed ledgers, the genesis block, nonce, … is a web site to visualize those parts, interactively explore possibilities, play with parameters, consider alternatives, question assumptions, and even questions the trustworthiness of blockchain technology. blockchain calm This article presents you snapshots from , a springboard for critical thought and deep understanding on blockchain. blockchain calm 1. Peer to peer network A network consisting of 12 peers is slowly built before records are sent 2. From the genesis block all the way up The Genesis Block kicks off by giving 1,000 coins to Joe. Money will flow from account to account but without the concept of mining the sum-game will always be 1,000. 3. Computing the ledger Any new block in the chain forces an update on the ledger 4. Double Spending Joe has 1,000 coins. An attempt to send 500 to Ronald and 800 to Freddie ends with one transaction being rejected. 5. Proof of work When creating a block we look for a value called a to combine with the payload to form a hash beginning with as many 0-bits as the property defines nonce difficulty

Blockchain, calm

Every Java developer sooner or later has the exact same problem. They wish they could see . beyond their public API Because information hiding is brilliant but, when things don’t work, it is nice to have a way to bypass it. (short for x-ray) gives you a laser beam to point against any Java object. xr Beam your x-rays towards Java objects Suppose you are given an instance of this class: {private int account_number;private String first_name;private String last_name;private Double balance; public class Account ...}; xr, lets you reveal its structure **>>**xr(account); account_numberbalancefirst_namelast_name and inspect its parts: **>>**xr(account,"account_number"); **>>**xr(account,"first_name"); **>>**xr(account,"last_name"); **>>**xr(account,"balance"); 13342101 John Smith 12,000 Flabbergasted ? I hope not. Use it now is a ready-to-use Nashorn/JavaScript function which uses introspection to discover all the fields in an object and reach their values. xr To use it, you need to run your Java program in an interactive environment. So, you have two alternatives: Use jjs Use nudge4j For both options all you have to do is one call: (' '); load https://gist.github.com/lorenzoongithub/7273902ac628b2761f46de2d0c2a31cd

A laser beam for Java investigators

is a piece of java code to let you hack your JVM from the browser. nudge4j There are many valid reasons to use it during development, and one, , it’s because it’s fun. for sure But there are others. Reason №1 — A teacher’s tool Use nudge4j as an expression evaluator to explain your son / daughter / friend / colleague how a given class works. Reason №2 — Demo your Java library. Say you have written a Java library or API. Then write a snippet of code in nudge4j to see it in action. Better than that, invite your colleague at your desk and ask him or her to suggest changes and try things out, on the fly. No need to recompile any demo code, simply play from the browser. Reason №3 — Smoke test (a.k.a one more sanity check). Aside from your existing unit tests, regression tests, integration tests, … you can keep to exercise some of the key functionality, maybe before pushing for the final release. a snippet of nudge4j code If it works, great. If it fails, you can hack your way because you are already in the JVM. Reason №4 — It’s even more powerful than you thought If you read 1, 2 and 3 you know that nudge4j can interact with any java object through its public API. But what if you want to get deeper than that ? What if you want to access private fields of an object ? It turns out that with a bit of ‘ ’ you can easily get there. Sometimes you might not need to turn to a debugger after all. reflection Conclusions Here we go, I gave you four reasons to use that I thought of on a tube journey that ended up being longer than usual. nudge4j Let me know if you can think of more. Thanks for reading this.

Four reasons to use nudge4j

nudge4j ships without a jar Copy/Paste this bit of code and we will add some awesome functionality to your Java program. Have you ever come across web sites making a similar claim ? No. I don’t think so. We, Java developers, don’t copy/paste bits of code. Except for , of course. But that’s the odd case. nudge4j Instead, web developers are quite used to this. Web developers know that they can integrate functionality from third-parties by copying/pasting a tiny script into their HTML pages. Some examples are: disqus ( ) link google analytics ( ) link addthis ( ) link It’s a great engineering work: by adding a few lines you end up with pages with conversations (disqus), with web analytics (google analytics) and with social buttons (addthis). There is more to it: disabling/enabling the added functionality then becomes as easy as commenting/uncommenting their snippets of code. In Java, we just don’t do it like that. And, to be honest, there are clearly some good reasons. Java applications don’t run in a sandboxed browser Java is a strongly typed language and API customization is easier when the jar is known at compilation time With so many established Java build tools (Ant, Maven, Graddle) third-party library creators are too busy integrating with them, to have time to even consider a different approach Java is verbose. And it gets even worse if you cannot make any assumption on where your snippet is going to be. For example you ought to fully qualify every class you intend to use or wrap code inside anonymous classes/functions to avoid variable conflicts. Copy/Paste this bit of code and we will add some awesome functionality to your Java program. Can we really try that ? And how can we create the which adds whatever functionality to the JVM ? smallest snippet of Java code Below is my attempt to write the tiniest, minimalest, claustrophobically spaceless snippet ever. Copy/Paste this tiny bit of code ( less-than-200-characters) and talk to your JVM from the browser on http://localhost:5050/ try{new javax.script.ScriptEngineManager().getEngineByName("js").eval("load('http://nudge4j.appspot.com/n/n4j.js')");}catch(Exception e){throw new RuntimeException(e);} The is less-than-200-characters-of-code lazily wrapping everything in a try-catch-exception creating a JavaScript engine using the to run an external JavaScript with the required functionality function load Frankly, I don’t think you can get any shorter than that. But I’d love to be proved wrong. Let me know if you can think of a shorter way.

The one and only Java tool shipped without a jar

an Object and got its class name @ its hexadecimal hashcode? Have you ever System-d dot out Chances are: it wasn’t what you were hoping for and it didn’t you help much. The problem is that, in Java, we lack a function which generates a good and consistent textual representation for any Java object. If we had it, we would write: System.out.println( .apply(myObject) ); toString instead of System.out.println( myObject**.toString()** ); // finger crossed, we// have a good toString. We would then stop cursing at developers for not implementing a damn good . toString is easy, if you decide to ignore a few edge cases. Hacking a universal toString It just requires you to use the reflection API to iterate over all the object’s fields to print them. that you can use with , with and in any Java 8 program. I wrote one Nashorn jjs nudge4j It’s written as a Nashorn JavaScript function. The function pretty much delegates all of the work to the poorly named (part of ). ReflectionToStringBuilder Apache Commons Lang You don’t need Apache Commons Lang in your classpath (I don’t have it either). I hate dependencies and I am not going to ask you to add it just for this. The code comes with to load it on demand from the maven repo. a good trick How do we use the toString function ? In Nashorn jjs and nudge4j you load it and you are ready to go: load(" ")toString(java.lang.Thread.currentThread()); https://gist.githubusercontent.com/lorenzoongithub/d1a7e047b29aef79d363b3b56c2e666a/raw/c486452e25d0f419101ae7bddd259240b17f1762/toString.js In Java you need to write a bit of boiler plate to wrap it up as a Java Function: Function<Object, String> toString = new Function<Object,String>() {private ScriptEngine engine; {try {engine = new ScriptEngineManager().getEngineByName("JavaScript");try (InputStream is = new URL(" ").openStream()) { https://gist.githubusercontent.com/lorenzoongithub/d1a7e047b29aef79d363b3b56c2e666a/raw/c486452e25d0f419101ae7bddd259240b17f1762/toString.js engine.eval(new InputStreamReader(  
      is, StandardCharsets.UTF\_8));  
  }  
} catch (ScriptException | IOException e) {  
  throw new RuntimeException(e);  
} } public String apply(Object oj) {try {return ""+((Invocable)engine).invokeFunction("toString", oj);} catch (NoSuchMethodException | ScriptException e) {throw new RuntimeException(e);}}}; System.out.println(toString.apply(Thread.currentThread())); : a universal function to stringify any Java Object. And that’s it It won’t have an impact on your day to day work but it might turn handy on one of those days. debugging Debug less. loading toString.js in nudge4j

A blooming good Java toString for the rest of us

Time Blocking, Color-Coding, Batching, and Calendar Audits Calendars had been there with us for thousands of years now. The first recorded calendar being the Babylonian calendar consisting of 12 Lunar Months starting when a crescent moon was sighted on the western horizon at sunset. With the advent of computers, calendaring software came into usage that enabled users to view their schedules and book meetings with other people. The term itself is taken from the , the term for the first day of the month in the Roman calendar, related to the verb “to call out”, referring to the calling or the announcement that the new moon was just seen. — calendar calends calare Wikipedia In the 1960s, a typical executive spent around 10 hours doing meetings. Since then, as the complexity of organizations and the nature of work we do has increased, we now spend about 23 hours a week doing meetings.¹ Post COVID, this has grown further and research states that people now attend 13% more meetings.² More than ever, we are now living in times where our days are governed by what is there on our calendar. And at times, this can be overwhelming. However, there are four techniques that can help your reclaim your control over your time. Time Blocking A lot of us maintain a to-do list, be it on an offline notebook or an online tool such as Asana, Google Keep, or Todoist. Time Blocking takes this a step further and you actually block time on your calendar to do specific tasks. Benjamin Franklin is one of the early practitioners of Time Blocking. Time Blocking helps and you’re not spending all your time reacting to inbound requests. It also helps you prioritize as you get a realistic view of how much you can get done in a day. A secondary benefit is that it of figuring out what you should be working on next as you have a plan in place. ensure you have time left to go through your planned to-do items reduces the cognitive load The way I go about time blocking is every Monday, start of the day, I list down my top three priorities and then block time for the tasks against them in the week. I do consciously leave out open time slots for flexibility and serendipity. Color-coding Color coding involves assigning colors to your calendar events based on priority, projects, or the kind of activities they are. A color-coded calendar . A regular calendar treats all events as the same. Whereas in the real world, a time block for an interview might require a completely different energy level and mindset as opposed to a time block for an executive review. helps you understand how your week looks like Batching Batching is a productivity technique in which you club together similar activities to reduce the context switching overhead. You can bucket your tasks as per projects you are working on, people you will be spending time with, or the nature of the activities such as is it a a time to write do code reviews or write product specs. You can extend the system to batch similar meetings too, wherever possible. Review session, a 1–on-1 with a report, or A variation of batching is having themes for your days and focus your tasks and meetings around the designated theme. Twitter and Square’s CEO Jack Dorsey³ is one of the well-known practitioners of theming Calendar Audits Calendar Audits between how you perceive you spend your time viz-a-viz how you actually spent your time. uncover the gap You can run audits on multiple dimensions such as projects, people, and types of activities. Think of Calendar Audits as a feedback loop for your weekly planning activity. A few questions that calendar audits provide an answer to are: As a Product Manager are you spending enough time with your customers? As a People Manager are you doing enough to grow your team? Are you spending enough time on your highest priority initiatives? Are you spending your time on high-leverage activities? Is your schedule balanced and optimized for your role? Calendars help people find a common time to meet, discuss, and get work done. However, calendars have not evolved to understand the context of a person’s role and responsibilities. This means that it ends up treating every person and every open time slot as the same. With these four techniques, you can take back control of your time and design a schedule that is optimized for your goals and priorities. We're working on a side project called Mornin to simplify how people can go about applying these four techniques on Google Calendar. Do give it a spin and let us know what you think. References https://en.wikipedia.org/wiki/Babylonian_calendar https://hbswk.hbs.edu/item/you-re-right-you-are-working-longer-and-attending-more-meetings https://www.forbes.com/sites/kevinkruse/2015/10/12/jack-dorsey-productivity-secret/?sh=63e73b73136a

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