mwanji

import java.util.*;
import java.util.function.*;
import java.util.stream.Collectors;
import static java.util.function.Function.identity;

public class NonRepeatingLetter {
  
  public static void main(String[] args) {
    findFirstNonRepeatingLetter(args[0], System.out::println);
  }

mwanji

App stores are fundamental to the success of modern platforms. Tent should have one, especially as decentralisation makes discovery even more difficult.

Overview
TentCatalog offers discovery, recommendations and one-click installs.
Recommendations are based on what the user's followers/followings have installed (if they have also installed TentCatalog) and what 3rd party catalogs recommend as well.

Flows
User installs TentCatalog.
TentCatalog requests read/write permissions of type https://tent.io/contrib/types/post/installation/v1.0
When user installs another app, TentCatalog is notified

mwanji

POST https://javaapiclient.tent.is/tent/apps/evo05h/authorizations
Accept:application/vnd.tent.v0+json
Content-Type:application/vnd.tent.v0+json
{
  "code": "a337d62419901973edeb182234a27739",
  "token_type": "mac"
}

Had I included an Authorization header, here's what the normalized request would have been:
1349520353

mwanji

timestamp=1349386748510
nonce=kaauue7k
method=POST
uri=/apps/ztfqej/authorizations
host=javaapiclient.tent.is
port=443
mac_key=d9ab6f3b87a8026e54aa5c971bd39e7c
mac_key_id=a:f6f0695f

What the Tent Ruby client says I should get:

mwanji

Two parts: Viewer and Publisher

Viewer

GET /posts of type Essay (https://tent.io/types/post/essay/v0.1.0)
Is notified when a new Essay is POSTed
Displays them as a blog

Publisher

mwanji

// apiSecret and accessToken have already been acquired

HttpClient httpClient = AndroidHttpClient.newInstance("");
HttpGet httpGet = new HttpGet(Urls.BASE + "/user");

long utcTimestamp = Calendar.getInstance(TimeZone.getTimeZone("UTC")).getTimeInMillis();
String rawNonce = NONCE_SALT + RANDOM.nextInt();
String nonce = rawNonce.substring(0, Math.min(rawNonce.length(), 35));
String normalisedString = accessToken + "\n"
	+ utcTimestamp + "\n" 

mwanji

package com.moandjiezana.mailapi;


import java.util.Date;
import java.util.Properties;

import javax.mail.Message.RecipientType;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;

mwanji

public String convenient(Object o) {
  return lessConvenient(o, "default");
}

public String lessConvenient(Object o, String suffix) {
  return o.toString() + suffix;
}

// Unit tests
// assume lessConvenient is already tested

mwanji

// Pair and SmartMap in action
// Problems:
// 1. this gives a compiler warning: "Type safety : A generic array of Pair<String,String> is created for a 
// varargs parameter"
// 2. All second elements of Pairs must be of same type, not even subclasses for it to compile.
public class Example {

    public static void main(String[] args) {
        SmartMap<String, String> myMap = map(of("key", "value1"), of("key2", "value 1"));
        System.out.println(myMap.get("key"));