From e37a382fe2eab112293c81250495537e94401f75 Mon Sep 17 00:00:00 2001
From: minjaesong <alswo9628@gmail.com>
Date: Sun, 27 Dec 2020 20:47:31 +0900
Subject: [PATCH] basic: string array is a thing now

---
 assets/disk0/tbas/basic.js         | 8 ++++----
 assets/disk0/tbas/doc/concepts.tex | 2 +-
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/assets/disk0/tbas/basic.js b/assets/disk0/tbas/basic.js
index a8d3a64..de5af06 100644
--- a/assets/disk0/tbas/basic.js
+++ b/assets/disk0/tbas/basic.js
@@ -719,8 +719,8 @@ if no arg text were given (e.g. "10 NEXT"), args will have zero length
 }},
 "!" : {f:function(lnum, stmtnum, args) { // Haskell-style CONS
     return twoArg(lnum, stmtnum, args, (lh,rh) => {
-        if (isNaN(lh))
-            throw lang.illegalType(lnum, lh); // BASIC array is numbers only
+        if (Array.isArray(lh))
+            throw lang.illegalType(lnum, lh); // NO ragged array!
         if (!Array.isArray(rh))
             throw lang.illegalType(lnum, rh);
         return [lh].concat(rh);
@@ -728,10 +728,10 @@ if no arg text were given (e.g. "10 NEXT"), args will have zero length
 }},
 "~" : {f:function(lnum, stmtnum, args) { // array PUSH
     return twoArg(lnum, stmtnum, args, (lh,rh) => {
-        if (isNaN(rh))
-            throw lang.illegalType(lnum, rh); // BASIC array is numbers only
         if (!Array.isArray(lh))
             throw lang.illegalType(lnum, lh);
+        if (Array.isArray(rh))
+            throw lang.illegalType(lnum, rh); // NO ragged array!
         return lh.concat([rh]);
     });
 }},
diff --git a/assets/disk0/tbas/doc/concepts.tex b/assets/disk0/tbas/doc/concepts.tex
index ee5ccf3..c965127 100644
--- a/assets/disk0/tbas/doc/concepts.tex
+++ b/assets/disk0/tbas/doc/concepts.tex
@@ -15,7 +15,7 @@ There are six basic types: \emph{number}, \emph{boolean}, \emph{string},  \emph{
 
 \emph{Boolean} is type of the value that is either \codebf{TRUE} or \codebf{FALSE}. Number \codebf{0} and \codebf{FALSE} make the condition \emph{false}. When used in numeric context, \codebf{FALSE} will be interpreted as 0 and \codebf{TRUE} as 1.
 
-\emph{String} represents immutable\footnote{Cannot be altered directly} sequences of bytes. However, you can't weave them to make something like \emph{string array}\footnote{Future feature\ldots\ maybe\ldots? Probably not\ldots}.
+\emph{String} represents immutable\footnote{Cannot be altered directly} sequences of bytes.
 
 \emph{Array} represents a collection of numbers in one or more dimensions.