fixed #249 - preserve variable value types with edge cases

(empty string, Boolean false)

2 files changed, 5 insertions, 2 deletions

diff --git a/history.txt b/history.txt
index abe22be..7a02a86 100755
--- a/history.txt
+++ b/history.txt
@@ -2015,4 +2015,5 @@ ______
 * Localization and Portuguese translation updates, thanks, Manuel!
 * Catalan translation update, thanks, Bernat!!
 * Threads: Text comparisons are now case-sensitive („fixes“ #175)
-* Threads: fixed # 179 - don’t identify primitive (static) C-Slots as implicit formal parameters
+* Threads: fixed #179 - don’t identify primitive (static) C-Slots as implicit formal parameters
+* Threads: fixed #249 - preserve variable value types with edge cases (empty string, Boolean false)
diff --git a/threads.js b/threads.js
index 2259850..3ff7a50 100644
--- a/threads.js
+++ b/threads.js
@@ -2954,7 +2954,9 @@ VariableFrame.prototype.getVar = function (name, upvars) {
 };
 
 VariableFrame.prototype.addVar = function (name, value) {
-    this.vars[name] = (value === 0 ? 0 : value || null);
+    this.vars[name] = (value === 0 ? 0
+              : value === false ? false
+                       : value === '' ? '' : value || null);
 };
 
 VariableFrame.prototype.deleteVar = function (name) {