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| -rw-r--r-- | tutorial/index.md | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/tutorial/index.md b/tutorial/index.md index 3b9cf1d5..993a1f63 100644 --- a/tutorial/index.md +++ b/tutorial/index.md @@ -530,7 +530,7 @@ It might be a good time to refresh your knowledge there. ## Task 14: streams and scanning input from the keyboard -Check out the idiomatic way for processing text from the keyboard: +Here's a skeleton of a program for processing text typed in at a keyboard: ``` fn main screen: (addr screen), keyboard: (addr keyboard) { @@ -542,23 +542,27 @@ fn main screen: (addr screen), keyboard: (addr keyboard) { compare done?, 0/false break-if-!= var g/eax: grapheme <- read-grapheme in + # do stuff with g here loop } } ``` `read-line-from-keyboard` reads keystrokes from the keyboard until you press -the `Enter` (also called `newline`) key, and accumulates them into a _stream_. +the `Enter` (also called `newline`) key, and accumulates them into a _stream_ +of bytes. The loop then repeatedly reads _graphemes_ from the stream. A +grapheme can consist of multiple bytes, particularly outside of the Latin +alphabet and Arabic digits most prevalent in the West. Mu doesn't yet support +non-Qwerty keyboards, but support for other keyboards should be easy to add. + This is a good time to skim the section in the Mu reference on [streams](https://github.com/akkartik/mu/blob/main/mu.md#streams), just to -give yourself a sense of what you can do with them. - -Does the above program make sense now? Feel free to experiment to make sense -of it. +give yourself a sense of what you can do with them. Does the above program +make sense now? Feel free to experiment to make sense of it. Can you modify it to print out the line a second time, after you've typed it out until the `Enter` key? Can you print a space after every character -(grapheme) when you print it out? +(grapheme) when you print the line out a second time? ## Task 15: generating cool patterns |