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frugal technology, simple living and guerrilla large-appliance repair

Regular blog here, 'microblog' there

Many of my traditional blog post live on this site, but a great majority of my social-style posts can be found on my much-busier microbloging site at updates.passthejoe.net. It's busier because my BlogPoster "microblogging" script generates short, Twitter-style posts from the Linux or Windows (or anywhere you can run Ruby with too many Gems) command line, uploads them to the web server and send them out on my Twitter and Mastodon feeds.

I used to post to this blog via scripts and Unix/Linux utilities (curl and Unison) that helped me mirror the files locally and on the server. Since this site recently moved hosts, none of that is set up. I'm just using SFTP and SSH to write posts and manage the site.

Disqus comments are not live just yet because I'm not sure about what I'm going to do for the domain on this site. I'll probably restore the old domain at first just to have some continuity, but for now I like using the "free" domain from this site's new host, NearlyFreeSpeech.net.

Sat, 17 Jun 2017

Eloquent Javascript, Chapter 3 (Functions) -- what the hell?

I read Chapter 3 of Eloquent Javascript some time ago, and it's a difficult one. It introduces the concept of functions. Quickly introduced are: Parameters and Scopes, Nested Scopes, Closure and Recursion.

It is too much, too fast with too few examples. I was able to do the first exercise, Minimum, but got lost in the second, Recursion.

Here is my solution for Minimum:

#!/usr/bin/env node
/* Eloquent Javascript, Chapter 3, Page 56, Exercises 
Create a function to find the minimum of two arguments

By Steven Rosenberg, 6/17/2017 */

function smallest(first_number, second_number) {
    if (first_number < second_number)
        return first_number;
    else if (second_number < first_number)
        return second_number;
    else
        console.log("They are equal")
}

// Output will be the smallest of these two numbers
console.log(smallest(100, 2));

Expressing this as a function doesn't really do much. The program could just as easily have been written in a straight "procedural" format. But it's a function, and it works.

The second problem on recursion stumped me. I'm pretty sure I can figure it out, but I need more time to think (and look up more on recursion).