Fix regex for isNumber

Description of necessary functionality for a regex that matches Javascript numbers found in Eloquent Javascript, (Ch 9, last exercise). See: http://eloquentjavascript.net/09_regexp.html#h_izldJoT3uv

diff --git a/src/regex.js b/src/regex.js
index 1b26afdc41fa9116b043e97274999c5bed03a594..d2e6c78e8c687e7b9a2434440e5e25c4a14a6df8 100644 (file)
--- a/src/regex.js
+++ b/src/regex.js
@@ -34,7 +34,7 @@ SVG.regex = {
 , isBlank:          /^(\s+)?$/
   
   // Test for numeric string
-, isNumber:         /^-?[\d\.]+$/
+, isNumber:         /^[+-]?(\d+(\.\d*)?|\.\d+)(e[+-]?\d+)?$/i
 
   // Test for percent value
 , isPercent:        /^-?[\d\.]+%$/
@@ -64,4 +64,4 @@ SVG.regex = {
 
   // matches X
 , X:                /X/g
-}
\ No newline at end of file
+}