messaging | Robert James Metcalfe Blog

Overseas Travel Global Roaming Mobile Primer Tutorial

Many people who travel overseas, or into other countries, may be worried by the charges that happen revolving around Global Roaming (or International Roaming) telecommunication charge arrangements. The approach you take to minimize these charges might involve, depending … if … Continue reading →

Iframe Hashtag Calling Tutorial

Hashtag usage in the webpage navigation aspects of web browser web applications we find more and more appealing around here … the far more generous hashtag allowances for lengthy URLs where it comes to links off emails (via “a” mailto: … Continue reading →

Channel Messaging API Notification Tutorial

In order to introduce another new Javascript API called “Channel Messaging API” … The Channel Messaging API allows two separate scripts running in different browsing contexts attached to the same document (e.g., two IFrames, or the main document and an … Continue reading →

Javascript Window Cross Domain Messaging Tutorial

A couple of days back with Javascript DOM Images Collection Primer Tutorial we sort of went back to the basics of Javascript DOM, right back to our two favourite web application webpage objects … We think the Javascript DOM (or … Continue reading →

WhatsApp Open Ended Error Message Tutorial

Installing the WhatsApp Messaging app for my students with Android mobile smart phones always brings up something of interest. Today’s “outing” that way got me thinking about “Open Ended Error Messages”, the WhatsApp one being … WhatsApp is temporarily unavailable. … Continue reading →

Contacts Primer Tutorial

The contacts app on any computer device is a great repository of information. As a huge fan of email we find contacts invaluable to link email addresses to mobile phone numbers in order to send messages, via that device’s messaging … Continue reading →

WhatsApp Messaging Android Image Chat Tutorial

A week on, using WhatsApp on an Android smartphone, my student, having had it installed, as you can see with WhatsApp Messaging Install Primer Tutorial, the few issues she had questions about this week were … How do you send … Continue reading →

WhatsApp Messaging Install Primer Tutorial

Today we installed WhatsApp (Messenger), from Facebook, onto an Android mobile smartphone for one of our students. Am not a user of WhatsApp myself, but installing it straightened out a few things about it in my mind, “me” not being … Continue reading →

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Latest Comments
1. admin on Tabular Single Row Radio Play TutorialOctober 12, 2026
  Thanks. Since then, a Shower Songs project at https://www.rjmprogramming.com.au/HTMLCSS/shower_songs.html is an improvement regarding "Radio Play" on mobile platforms.
2. LTX 2.3 Free on Tabular Single Row Radio Play TutorialOctober 12, 2026
  This is a thoughtful example of using a single-row layout and scroll behavior to reveal media progressively. I especially liked the way the tutorial ties the gallery to real interaction details rather than treating the UI as a static mockup. For readers experimenting with the next stage of visual prototyping, LTX 2.3 Free collects prompt examples and workflow guidance for planning AI video scenes; the same attention to camera movement and timing is useful when turning a storyboard into motion.
3. Marcus Ellery on Tabular Single Row Radio Play TutorialOctober 12, 2026
  The focus juggling with click() and blur() sounds painful. I ran into the same thing chaining YouTube iframes, the browser keeps handing focus back to whichever player was touched last. Keeping the window small and off to the side is a neat workaround. Any plan to bring Radio Play to mobile?
4. Sean Zhang on Word SearchSeptember 17, 2026
  Word search is such a good project size — enough logic (grid generation, word placement, collision checking) to stay interesting, but still shippable in an afternoon. I came to these kinds of puzzles from the canvas-game side, where the bottleneck turned out to be art assets rather than code; drawing the same character walking in four directions by hand was the worst part, which is why I ended up building a tool that generates walk-cycle sprite sheet candidates from a single reference image. Enjoyed reading how you approached this one.
5. Alex.X on Word SearchSeptember 17, 2026
  Seeing grammatical terms such as Adjective and Adverb alongside abbreviations such as API highlights how different kinds of words need different explanations. For learners, a one-sentence definition and a short usage example would help distinguish a word's meaning from merely recognizing its spelling. It would also be useful to distinguish an abbreviation's expansion from what it means in context.

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Tag Archives: messaging

Overseas Travel Global Roaming Mobile Primer Tutorial

Iframe Hashtag Calling Tutorial

Channel Messaging API Notification Tutorial

WhatsApp Open Ended Error Message Tutorial

Contacts Primer Tutorial

WhatsApp Messaging Android Image Chat Tutorial

WhatsApp Messaging Install Primer Tutorial

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Your Numbers Game

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