polygonal lasso

1 files changed, 29 insertions, 0 deletions

diff --git a/assets/javascripts/util/uid.js b/assets/javascripts/util/uid.js
new file mode 100644
index 0000000..0c0b176
--- /dev/null
+++ b/assets/javascripts/util/uid.js
@@ -0,0 +1,29 @@
+(function(){
+
+	var UidGenerator = function(list){
+		var id = 0
+		var generator = function(s){
+			s = s || ""
+			var ss
+			while (1) {
+				ss = s + (id++)
+				if (! (ss in list)) {
+					return ss
+				}
+			}
+		}
+		generator.setList = function(newList){
+			list = newList
+		}
+		return generator
+	}
+
+	if ('window' in this) {
+		window.UidGenerator = UidGenerator
+	}
+	else {
+		module.exports = UidGenerator
+	}
+	
+})()
+