--- a/chapters/19.markdown Thu Nov 15 22:21:05 2012 -0500
+++ b/chapters/19.markdown Fri Nov 16 20:17:06 2012 -0500
@@ -3,13 +3,12 @@
Up to this point we've covered single commands. For the next third of the book
we're going to look at Vimscript as a *programming language*. This won't be as
-instantly gratifying as the rest of what we've learned, but it will lay the
-groundwork for the last part, which walks through creating a full-fledged Vim
-plugin from scratch.
+instantly gratifying as the rest of what you've learned, but it will lay the
+groundwork for the last part of the book, which walks through creating
+a full-fledged Vim plugin from scratch.
-The first thing we need to talk about are variables.
-
-Run the following commands:
+Let's get started. The first thing we need to talk about are variables. Run
+the following commands:
:::vim
:let foo = "bar"
@@ -22,9 +21,10 @@
:let foo = 42
:echo foo
-Vim will display "42", because we've reassigned `foo` to the integer "42". From
-this it may seem that Vimscript is dynamically typed. That's not the case, but
-we'll talk more about that later.
+Vim will display "42", because we've reassigned `foo` to the integer "42".
+
+From these short examples it may seem like Vimscript is dynamically typed.
+That's not the case, but we'll talk more about that later.
Options as Variables
--------------------
@@ -53,8 +53,9 @@
:echo &wrap
This time Vim displays "1". This is a very strong hint that Vim treats the
-integer "0" as "false" and the integer "1" as "true". It's reasonable to assume
-that Vim treats *any* non-zero integer as "truthy", and this is indeed the case.
+integer `0` as "false" and the integer `1` as "true". It would be reasonable to
+assume that Vim treats *any* non-zero integer as "truthy", and this is indeed
+the case.
We can also *set* options as variables using the `let` command. Run the
following commands:
@@ -127,14 +128,14 @@
:echo @/
Vim will echo the search pattern you just used. This lets you programmatically
-read and modify the current search pattern, which can be very useful at times.
+read *and modify* the current search pattern, which can be very useful at times.
Exercises
---------
-Go through your `~/.vimrc` file and change some of the `set` and
-`setlocal` commands to their `let` forms. Remember that boolean options still
-need to be set to something.
+Go through your `~/.vimrc` file and change some of the `set` and `setlocal`
+commands to their `let` forms. Remember that boolean options still need to be
+set to something.
Try setting a boolean option like `wrap` to something other than zero or one.
What happens when you set it to a different number? What happens if you set it
--- a/chapters/20.markdown Thu Nov 15 22:21:05 2012 -0500
+++ b/chapters/20.markdown Fri Nov 16 20:17:06 2012 -0500
@@ -5,15 +5,15 @@
language like Python or Ruby. For the most part variables act like you would
expect, but Vim adds a certain twist to variables: scoping.
-Open two buffers in separate splits, then go into one of then and run the
-following commands:
+Open two different files in separate splits, then go into one of them and run
+the following commands:
:::vim
:let b:hello = "world"
:echo b:hello
As expected, Vim displays "world". Now switch to the other buffer and run the
-echo command again:
+`echo` command again:
:::vim
:echo b:hello
@@ -35,4 +35,3 @@
don't know what some of them mean, just take a look and keep them in the back of
your mind.
-