@@ -5,56 +5,30 @@ template = "doc.html"
6Before we begin working on Hoon, you should first (1) have Urbit installed and (2) boot a ship that you can use for trying out Hoon examples. Interactive learning is far superior to passive reading.
6Before we begin working on Hoon, you should first (1) have Urbit installed and (2) boot a ship that you can use for trying out Hoon examples. Interactive learning is far superior to passive reading.
10−You can install Urbit on any Mac or Unix machine; follow the steps for [creating a development ship](/docs/using/creating-a-development-ship). On Windows, make a virtual Linux machine using VirtualBox or a similar tool.
12−Once you're finished you can boot your very own ship.
14## What is an urbit?
8## What is an urbit?
16An **urbit** is an Urbit virtual computer with persistent state that can connect to the Urbit network. (Note the lowercase 'u' here. 'Urbit' is the entire software stack, whereas 'an urbit' is a local instance.) Each urbit is associated with a unique number that plays three distinct roles: (1) it's an address on the Urbit network, (2) it's a cryptographic identity, and (3) it's (in principle) a human memorable name. Normally an urbit's name is represented as a string starting with `~`, as in `~zod` or `~taglux-nidsep`.
10An **urbit** is an Urbit virtual computer with persistent state that can connect to the Urbit network. (Note the lowercase 'u' here. 'Urbit' is the entire software stack, whereas 'an urbit' is a local instance.) Each urbit is associated with a unique number that plays three distinct roles: (1) it's an address on the Urbit network, (2) it's a cryptographic identity, and (3) it's (in principle) a human memorable name. Normally an urbit's name is represented as a string starting with `~`, as in `~zod` or `~taglux-nidsep`.
18These may not look like numbers, but they are. Each urbit name is written in a base-256 format, where each 'digit' is a syllable. Imagine your phone number as a pronounceable string which sounds like a name in a foreign language. An ordinary user-level urbit is a 'planet', and it's named by a 32-bit number. The latter is represented as a four-syllable string; e.g., the planet name `~taglux-nidsep` is the number 6,095,360.
12These may not look like numbers, but they are. Each urbit name is written in a base-256 format, where each 'digit' is a syllable. Imagine your phone number as a pronounceable string which sounds like a name in a foreign language. An ordinary user-level urbit is a 'planet', and it's named by a 32-bit number. The latter is represented as a four-syllable string; e.g., the planet name `~taglux-nidsep` is the number 6,095,360.
20−For this tutorial you'll boot and run what we call a 'comet'. **Comets** are urbits whose names are 128-bits or 16 syllables, such as:
14+## Installing Urbit
22−`~hillyn-pitwet-hasdur-paswer--miszod-rabpex-divrup-fogdur`
24−Comet names aren't quite as memorable as others, but they're disposable identities that anyone can make for free to join the live network. Thus, comets make the ideal urbit for playing around with Hoon, asking for help from other Urbit devs in [Talk](./docs/using/messaging.md) if you need it, and showing off Urbit to your friends.
28−To boot your comet, go into the command line and run the following command from the directory that was created during Urbit installation:
34−This will take a few minutes and will spin out a bunch of boot messages. Toward the end, you'll see something like:
36−```
16+You can install Urbit on any Mac or Unix machine; if you're just trying out Urbit or creating a development ship, you can follow the steps for creating a development ship [here](/docs/using/creating-a-development-ship). On Windows, make a virtual Linux machine using VirtualBox or a similar tool.
37−ames: on localhost, UDP 31337.
38−http: live (insecure, public) on 8080
39−http: live ("secure", public) on 8443
40−http: live (insecure, loopback) on 12321
44−(There will likely be other messages as well.)
18+Once you're finished, you can [boot your very own ship](/docs/getting-started/booting-a-ship/#step-3-run-the-boot-command). While you can develop in Hoon on your own ship on the live network, we strongly suggest developing on a development ship first.
46−Look at the prompt, `~palnul_nocser:dojo>`. To the left of the `:` you'll see an abbreviation of the comet name you just booted, `~palnul_nocser` in this case. To the right is the name of a local application, `dojo`. **Dojo** is the Urbit command line app; it's also a Hoon [REPL](https://en.wikipedia.org/wiki/Read%E2%80%93eval%E2%80%93print_loop) we'll use to run simple Hoon examples.
20+## Getting started
48−To make sure everything is working, type `(add 2 2)` at the prompt and hit return. Your screen now shows:
22+Once you've created your development ship, let's try a basic command. Type `(add 2 2)` at the prompt and hit return. Your screen now shows:
51−ames: on localhost, UDP 31337.
26+ames: czar: ~zod on 31337 (localhost only)
52−http: live (insecure, public) on 8080
27+http: live (insecure, public) on 80
53−http: live ("secure", public) on 8443
54http: live (insecure, loopback) on 12321
28http: live (insecure, loopback) on 12321
55> (add 2 2)
29> (add 2 2)
57−~palnul_nocser:dojo>
31+~zod:dojo>
60You just used a function from the Hoon standard library, `add`. Next, quit Urbit with `ctrl-d`:
34You just used a function from the Hoon standard library, `add`. Next, quit Urbit with `ctrl-d`:
@@ -62,42 +36,21 @@ You just used a function from the Hoon standard library, `add`. Next, quit Urbi
63> (add 2 2)
37> (add 2 2)
65−~palnul_nocser:dojo>
39+~zod:dojo>
69−Your comet isn't running anymore and you're back at your computer's normal terminal prompt. You now have a `mycomet` directory for your Urbit comet; this directory is your comet's **pier** and it contains the entirety of your comet's state.
43+Your ship isn't running anymore and you're back at your computer's normal terminal prompt. If your ship is `~zod`, then you can restart the ship by typing:
71−Right now the only thing in your pier is your comet's system files:
74−$ ls -a /path/to/mycomet
78−Restarting your already-created comet from the terminal is like creating a new one, but without the `-c` flag. (The `-c` is for "create".)
81−$ urbit mycomet
46+urbit zod
84−Because the comet has already been booted it won't take very long to get it running again. There are also fewer startup messages:
89−ames: on localhost, UDP 31337.
90−http: live (insecure, public) on 8080
91−http: live ("secure", public) on 8443
92−http: live (insecure, loopback) on 12321
96## Another Noun
49## Another Noun
98−You've already used a standard library function to produce one value, in the dojo. Now that your comet is running again, let's try another. Enter the number `17`.
51+You've already used a standard library function to produce one value, in the dojo. Now that your ship is running again, let's try another. Enter the number `17`.
100−> We won't show the `~palnul_nocser:dojo> ` prompt from here on out. We'll just show the echoed command along with its result.
53+> We won't show the `~zod:dojo> ` prompt from here on out. We'll just show the echoed command along with its result.
102You'll see:
55You'll see:
@@ -106,7 +59,7 @@ You'll see:
109−You asked dojo to evaluate `17` and it echoed the number back at you. This value is a 'noun'. But what is a noun? Move on to lesson 1.2 for the answer.
62+You asked dojo to evaluate `17` and it echoed the number back at you. This value is a 'noun'. We'll talk more about nouns in [Chapter 1.2](docs/learn/hoon/hoon-tutorial/nouns/), but first let's write a very basic program.
111## Generators
64## Generators