Merge pull request AllAlgorithms#32 from ferdhika31/master

abranhe · web-flow · commit cb2d75357c16 · 2018-10-03T01:20:05.000-04:00
Add math and strings
diff --git a/math/quadrant.js b/math/quadrant.js
@@ -0,0 +1,21 @@
+// Author: Ferdhika Yudira
+// Quadrant detector
+
+var quadrant = function (x, y){
+    var quadrant = 4;
+
+    if(x > 0 && y > 0){
+		quadrant = 1;
+	}else if(x < 0 && y > 0){
+		quadrant = 2;
+	}else if(x < 0 && y < 0){
+		quadrant = 3;
+	}
+    
+    return quadrant;
+} 
+
+// test
+console.log(quadrant(-5, 2));
+console.log(quadrant(5, 2));
+console.log(quadrant(-5, -2));
diff --git a/strings/palindrome.js b/strings/palindrome.js
@@ -0,0 +1,31 @@
+// Author: Ferdhika Yudira
+// Palindrome
+
+var isPalindrome = function (text){
+    text = text.split('');
+	index=0;
+	palindrom=true;
+	
+	pTeks=text.length;
+	
+	i=0;
+	while((i<pTeks/2) && (palindrom===true)){
+		if(text[index]==text[pTeks-1]){
+			index++;
+			pTeks--;
+		}else{
+			palindrom=false;
+		}
+		
+		i++;
+	}
+	
+	return palindrom;
+} 
+
+// test
+var cases = "ada apa dengan kakak kakak lari sejak malam ada ada saja";
+
+cases.split(" ").map(function(res, i){
+    console.log(res+" : isPalindrom? "+isPalindrome(res));
+});
