Boole is your local analytics consultant. Based in Auckland, New Zealand, Boole offers web analytics services including Google Analytics tracking installation, data reporting, and optimisation. Boole's services range from auditing to consulting and teaching. A digital analytics expert, Boole provides analytics debugging and troubleshooting services to help you fix your existing Google Analytics setup. Boole works with a range of industry leading tools such as Google Analytics, Google Optimise, Google Data Studio, Google Tag Manager, Hotjar, Facebook Pixel, and others to help you get the most of your marketing.

What is Data Commons ( Read Hesper's introduction to Data Commons ( to learn more about the open knowledge graph built from thousands of public datasets.

Learn more about how Bayer uses semantic web technologies for corporate asset management and why it enables the FAIR data in the corporate environment.

An introduction to WikiPathways by Tett Bioinformatics is an overview of the collaboratively edited structured biological pathway database that discusses the history of the project, applications of the open dataset, and ways to access the data programmatically.

Hesper's article about question answering explains how question answering helps extract information from unstructured data and why it will become a go-to NLP technology for the enterprise.

Read more about how document understanding AI works, what its industry use cases are, and which cloud providers offer this technology as a service.

Lexemes are Wikidata's new type of entity used for storing lexicographical information. The article explains the structure of Wikidata lexemes and ways to access the data, and discusses the applications of the linked lexicographical dataset.

Boole is a marketing consultant in Auckland, New Zealand. Boole helps you optimise your website content, product, and services through A/B testing, personalisation, and product recommendations supported by accurate and timely measurement of your key business metrics such as web conversion rates.

Tett is a bioinformatics consultant in Auckland, New Zealand. Tett Bioinformatics offers bioinformatics services including genomics and biomedical data analysis and discovery.

The guide to exploring linked COVID-19 datasets describes the existing RDF data sources and ways to query them using SPARQL. Such linked data sources are easy to interrogate and augment with external data, enabling more comprehensive analysis of the pandemic both in New Zealand and internationally.

The introduction to the Gene Ontology graph published by Tett outlines the structure of the GO RDF model and shows how the GO graph can be queried using SPARQL.

Hesper is a knowledge management and data integration consultant in Auckland, New Zealand. Hesper's insights into state-of-the-art data, information, and knowledge management enable it to help organisations reassess their data analysis, integration, and enrichment approaches in light of advanced semantic technologies that are evolving every day. Enterprise knowledge graphs, knowledge bases, ontologies, and taxonomies are emerging technologies that support better decision-making and knowledge integration and enable automated knowledge inference over internal and external data.

The overview of the Nobel Prize dataset published by Hesper demonstrates the power of Linked Data and demonstrates how linked datasets can be queried using SPARQL. Use SPARQL federation to combine the Nobel Prize dataset with DBPedia.

Learn why federated queries are an incredibly useful feature of SPARQL.

As digital products and services are becoming more and more complex, so are the technical requirements for correctly implementing user measurement and analytics. Boole helps you better understand your audience by setting up measurement using Google Analytics.

What are the best online Arabic dictionaries?

How to pronounce numbers in Arabic?

List of months in Maori.

Days of the week in Maori.

The list of country names in Tongan.

The list of IPA symbols.

What are the named entities?

What is computational linguistics?

Learn how to use the built-in React hooks.

Learn how to use language codes in HTML.

Learn about SSML.

Browse the list of useful UX resources from Google.

Where to find the emoji SVG sources?.

What is Wikidata?

What's the correct markup for multilingual websites?

How to use custom JSX/HTML attributes in TypeScript?

Learn more about event-driven architecture.

Where to find the list of all emojis?

How to embed YouTube into Markdown?

What is the Google Knowledge Graph?


Explore the list of coronavirus (COVID-19) resources for bioinformaticians and data science researchers.

Sequence logos visualize protein and nucleic acid motifs and patterns identified through multiple sequence alignment. They are commonly used widely to represent transcription factor binding sites and other conserved DNA and RNA sequences. Protein sequence logos are also useful for illustrating various biological properties of proteins. Create a sequence logo with Sequence Logo. Paste your multiple sequence alignment and the sequence logo is generated automatically. Use the sequence logo maker to easily create vector sequence logo graphs. Please refer to the Sequence Logo manual for the sequence logo parameters and configuration. Sequence Logo supports multiple color schemes and download formats.

Sequence Logo is a web-based sequence logo generator. Sequence Logo generates sequence logo diagrams for proteins and nucleic acids. Sequence logos represent patterns found within multiple sequence alignments. They consist of stacks of letters, each representing a position in the sequence alignment. Sequence Logo analyzes the sequence data inside the user's web browser and does not store or transmit the alignment data via servers.

Te Reo Maps is an online interactive Maori mapping service. All labels in Te Reo Maps are in Maori, making it the first interactive Maori map. Te Reo Maps is the world map, with all countries and territories translated into Maori. Please refer to the list of countries in Maori for the Maori translations of country names. The list includes all UN members and sovereign territories.

Phonetically is a web-based text-to-IPA transformer. Phonetically uses machine learning to predict the pronunciation of English words and transcribes them using IPA. is a tool for converting Unicode-based internationalized domain names to ASCII-based Punycode encodings. Use to quickly convert Unicode to Punycode and vice versa. Internationalized domains names are a new web standard that allows using non-ASCII characters in web domain names.

Bioinformatically is an online journal about everything bioinformatics. It includes industry news, research highlights, and a variety of editorials. Bioinformatically helps you start your day with everything you need to know and a dash of fun.

My Sequences is an online platform for storing and analyzing personal sequence data. My Sequences allows you to upload your genome sequences and discover insights and patterns in your own DNA.

Словообразовательный словарь «Морфема» дает представление о морфемной структуре слов русского языка и слов современной лексики. Для словообразовательного анализа представлены наиболее употребительные слова современного русского языка, их производные и словоформы. Словарь предназначен школьникам, студентам и преподавателям. Статья разбора слова «сладкоежка» по составу показывает, что это слово имеет два корня, соединительную гласную, суффикс и окончание. На странице также приведены слова, содержащие те же морфемы. Словарь «Морфема» включает в себя не только те слова, состав которых анализируется в процессе изучения предмета, но и множество других слов современного русского языка. Словарь адресован всем, кто хочет лучше понять структуру русского языка.

Разбор слова "кормушка" по составу.

Разбор слова "светить" по составу.

Разбор слова "сбоку" по составу.

Разбор слова "шиповник" по составу.

Разбор слова "народ" по составу.

Разбор слова "впервые" по составу.

Разбор слова "свежесть" по составу.

Разбор слова "издалека" по составу.

Разбор слова "лесной" по составу.


Receiving email with Node.js

How to receive email in Node.js?

Servers use the SMTP protocol for sending and receiving email. SMTP is an application layer protocol, like HTTP, FTP, and SSH.

To start receiving email, one needs to have an SMTP server listening on port 25. An SMTP server is a computer/machine/process/application that accepts TCP connections and uses the SMTP protocol. Similarly, the HTTP client normally connects to the host's TCP port 80.


The smtp-server npm module is a library for creating SMTP servers in Node.js similar to how you create HTTP servers.

The cool thing is that this way it's very easy to see everything that is sent your way by accepting all incoming mail. Most full-blown email server applications like Postfix by default restrict recipient addresses and reject other emails. With your own email server, you can check emails imperatively. Similar to how Apache Server and nginx are configurable using httpd.conf and nginx.conf, but with Express.js you can achieve anything you want much easier.

Start SMTP server

const SMTPServer = require('smtp-server').SMTPServer;
const server = new SMTPServer({
    onData: (stream, session, callback) => {
        // Process message

An incoming email fires the onData callback. Use this handler to get the stream for the incoming message:

const SMTPServer = require('smtp-server').SMTPServer;
const server = new SMTPServer({
    onData: (stream, session, callback) => {
        stream.pipe(process.stdout); // Print the message to stdout
        stream.on('end', callback); // Must run the callback once done

The session object passed to the handler includes useful properties such as remoteAddress (the IP address of the connected client) and envelope. The envelope is the email message metadata sent outside of the message headers and body and includes the mailFrom and rcptTo properties.

The cool thing is that the stream includes the message as-is with no modifications.

Notifying the sender that an error has occurred

If your server was unable to process (save or relay) the incoming message, your server should notify the connected sender client of an error by rejecting the message. Pass an error object to the callback:

const SMTPServer = require('smtp-server').SMTPServer;
const server = new SMTPServer({
    onData: (stream, session, callback) => {
        // Failed to process the message
        callback(new Error('Oops, something went wrong'));

Finding the recipient and sender of the email

The recipient is passed in with the RCPT TO command (that address is included in the envelope) and as a message header. Check both values because they may differ.

SMTP does not have a mechanism for verifying the sender. It's similar to seeing "From" on a physical envelope.

Testing SMTP server

When a client connects to your SMTP server, they exchange SMTP commands that include HELO, EHLO, DATA, and so on.


An email server listening on port 25 should support upgrading to TLS. SMTPServer supports it by default, and all you need to do is add key and cert to the options passed to the SMTPServer constructor:

const SMTPServer = require('smtp-server').SMTPServer;
const server = new SMTPServer({
    secure: false,
    key: fs.readFileSync('private.key'),
    cert: fs.readFileSync('server.crt'),
    onData: (stream, session, callback) => {
        // Process incoming messages

Notice that we also have secure: false (it is false by default). Setting secure to true makes the SMTP server only understand TLS and reject non-TLS. Email clients that support TLS still start with non-TLS when they connect to port 25.

This is similar to configuring an HTTPS server in Node.js. HTTPS will normally listen on port 443, and HTTP on port 80.

Sending email

Sending emails requires acting as an SMTP client and is covered here.

Relaying email

If your server receives an email addressed to someone else, you can choose to relay it (send it to the destination). This qualifies your email server as an open relay.

Last updated on Feb 29, 2020 by Anton Vasetenkov
See also
Building a DNS server in Node.js
How to build a DNS server in Node.js?
Signed exchanges
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Using amp-script.
Line breaks in CSS
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Preloading on hover
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What is Cypress?
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