Javascript Archives - Jeff Everhart

Audiographics: Annotating Sound

Over the last several weeks, I’ve been working on several prototypes to help facilitate different types of annotations. Most educators are already pretty familiar with the typical textual annotation, but as new media becomes more important, we ought to have tools that facilitate annotation on other types of media as well. What is an audiographic? […]

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Creating a CRUD Web App with Google Sheets

Google Sheets tends to be my go to whenever I need to build a really lightweight application that has a limited life span. Usually, these things typically involve a short turnaround or some type of very well-defined set of requirements. After Tom did some work demonstrating the utility of silent Google Forms submissions using JS […]

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Visualizing Geographic Data with D3

I’m not sure the power of visualizing data can be understated in the modern world. After all, we have more data than we’ve every had before, and we at least seem to understand the world we live in less and less. For example, this image below displays population density in Virginia census tracts, but what […]

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The Future of JavaScript and the Browser

I’ve been doing a deep dive into Vanilla JavaScript lately, partly as a pretty overt reaction to the proliferation of client-side MV* frameworks. My thought process is that the time spent learning frameworks isn’t necessarily transferrable beyond some of the high-level concepts they help you solve, things like routing, data-binding, and dependency injection. But, once […]

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Fixing error: cannot read property “values” from undefined

Typeerror: cannot read property “values” from undefined is one of the most persistent and frequent errors you can get when doing any type of scripting in Google Apps Script. One of the most frequent questions I get on this blog, so I decided to dedicate a post to helping people troubleshoot this pesky error. First, […]

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How to build an HTTP file server with Node.js

Over the last year or so, I’ve been working more and more with Node.js for a variety of projects. I started by building a few command line apps, progressed to some simple Node/Express sites, and more recently tackled some pretty complex apps that integrate RESTful web services that are hosted on AWS and Heroku. While […]

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Building A Simple Heat Map with D3

Heat maps are a great way to analyze frequency in a data set. Beautiful and creative things happen when you are stuck in an airport for four hours. I’ve been wanting to explore heat map visualizations for awhile now, so when I had some time to kill flying back from SXSW, I decided to take […]

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The Pros and Cons of Using Google Sheets as an Application Backend

I’ve been doing more lately working with APIs of different sorts, and I recently stumbled onto some cool ways to use Google Sheets to connect with APIs and store the data very easily in a spreadsheet. Having completed the linked project in less than an hour, I was really interested in figuring out the pros […]

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Debugging Node.js Processes | Error events.js 141

Debugging Node.js processes on the server can be kind of painful depending on what tools you have available to help you make sense of error messages. After scouring the web, it seems that a lot of people get frustrated by an error that gets thrown at events.js 141, which seems to be a generic socket […]

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How to send a confirmation email with Google Forms

In this short tech tip, we are going to look at how to make a Google Forms send a confirmation email to the user each time they submit a form. This is just a basic template for how to make this happen, so it is worth mentioning that there are plenty of other ways to […]

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