Barcelona, Spain

Villa Catalina, Stiges

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Functional Light JavaScript workshop

Functionite company did an impressive job bringing JavaScript expert Kyle Simpson to their hometown Warsaw, Poland in September last year. He lead You Don’t Know JS Workshops, 5 days of JavaScript classes focused on learning new skills and the best practices. I joined on the last day to attend an excellent workshop titled Functional-Light JavaScript. In this post I wanted to share slides and my coding exercises from this course. If you are curious what topics related to functional programming were covered I strongly recommend checking notes from a similar workshop shared by Beth Allchurch.

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A journey to functional JavaScript: Part 1 – fundamentals

JavaScript has a quite fascinating history. Brendan Eich created on his own the first language prototype in just ten days. Its implementation was highly influenced by the concepts of first-class functions from Scheme and prototypes from Self. Initially it was developed under the name Mocha, but released as LiveScript. The latter name didn’t last long either. Java was so hot back in 1995, that Netscape decided to take marketing move and rename their new language to JavaScript. This decision has greatly influenced the way JavaScript has been perceived for many years. Outward similarities to Java promoted imperative, object-oriented style among developers using it. Ideas borrowed from Scheme have always enabled using functional programming styles as well. However it was never the case until it started to get momentum a few month ago.

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Sri Lanka

Sri Lanka is an island country in South Asia near south-east India. It was known from the beginning of British colonial rule until 1972 as Ceylon. It’s still more recognizable in Poland by its old name because of the popularity of Ceylon tea. However this country has much more to offer, it is not limited to the picturesque tea hills. There is majestic wild life with mighty elephants in the lead. The country has sandy beaches overgrown with paradise palm trees that perfectly match with bright sunny warm days. We stayed at the west coast of the island in July last year. The sea temperature was high at that time, but it was less suitable for swimming  because there were high tides and strong currents.

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The Valley of Palaces and Gardens

There is a big valley in Silesia region surrounding Jelenia Góra city. In the 19th century, the lovely landscape attracted the Prussian high nobility, which built magnificent palaces, manors and parks. The enormous number of stately homes turned the valley into one of the most important garden landscapes in the Middle Europe. This is where well-known European families: the Habsburgs, Hohenzollerns, Schaffgotschs, Czartoryski or Radzivills built their residences. Some of those monumental buildings have survived till this day. They have been recently restored and made available to the tourists, giving a unique opportunity to travel back in time. This includes palaces in Łomnica, Wojanów, Pakoszów or Karpniki which I visited in the past week with unspeakable pleasure.

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United States customary units

They still didn’t switch to the metric system in the United States. They are using non-metric, archaic Imperial system of weights and measures. I collected some hints which are helpful where you need to convert units from one system to another.

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Current state of Progressive Web Apps

I have recently spent some time investigating the current state of Progressive Web Apps (PWA). Some of you may be wondering what hides behind yet another buzzword originally proposed by Google in 2015? This is an umbrella term for certain technologies that go together to produce an app-like experience on the web. This is how it is advertised by Google on their landing page:

A new way to deliver amazing user experiences on the web.

Progressive Web Apps are user experiences that have the reach of the web, and are:

  • Reliable – Load instantly and never show the downasaur, even in uncertain network conditions.
  • Fast – Respond quickly to user interactions with silky smooth animations and no janky scrolling.
  • Engaging – Feel like a natural app on the device, with an immersive user experience.

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