add oop_javascript interface

Author: lpdevs

OOP_javascript/interface_completejavascript.com.js

@@ -0,0 +1,57 @@
+function ArraySeq(_array){
+	var array = _array.slice();
+	var start = 0;
+	var end   = array.length - 1;
+
+	this.isEmpty = function(){
+		return end < start;
+	}
+
+	this.get = function(idx){
+		if(idx >= start && idx <= end)
+			return array[idx];
+		else 
+			return "Index invalid!";
+	}
+
+	this.indexOfTail = function(){
+		return end;
+	}
+}
+
+function RangeSeq(_st, _ed){
+	var base = _st;
+	var start = 0;
+	var end = _ed - _st;
+
+	this.isEmpty = function(){
+		return end < start;
+	}
+
+	this.get = function(idx){
+		if(idx >= start && idx <= end)
+			return idx + base;
+		else 
+			return "Index invalid!";
+	}
+
+	this.indexOfTail = function(){
+		return end;
+	}
+}
+
+function logFive(seq){
+  if(!seq.isEmpty()){
+  	var cnt = 0;
+  	var idx = 0;
+  	while(true){
+      console.log(seq.get(idx));
+      cnt++;
+      if(cnt == 5 || idx == seq.indexOfTail()) break;
+      idx++;
+  	}
+  }
+}
+
+logFive(new ArraySeq([1, 2]));
+logFive(new RangeSeq(100, 1000));