New Problems

New Problems

Author: narkarum

src/chapter01introduction/Variables.py

@@ -0,0 +1,17 @@
+# your code goes here#Assign x to a Integer
+x = 5
+print "The value of x is:", x
+print "The type of x is:", type(x)
+print "The memory location of x is:", id(x)
+
+#Assign x to a Float
+x = 6.5
+print "The value of x is:", x
+print "The type of x is:", type(x)
+print "The memory location of x is:", id(x)
+
+#Assign x to a String
+x = "CodingDucks.org"
+print "The value of x is:", x
+print "The type of x is:", type(x)
+print "The memory location of x is:", id(x) 

src/chapter01introduction/Variables2.py

@@ -0,0 +1,8 @@
+x = 5
+print "Memory location of x:",id(x)
+
+x = 6
+print "Memory location of x:",id(x)
+
+y = 5
+print "Memory location of y:",id(y)

src/chapter21miscconcepts/RegexDemo.java

@@ -0,0 +1,29 @@
+import java.util.regex.*;
+
+class RegexDemo{
+	public static void main (String[] args) throws java.lang.Exception{
+		//matches numbers only
+		String regexStr = "^[0-9]*$";
+		System.out.println(Pattern.matches(regexStr,"97845613000"));
+		System.out.println(Pattern.matches(regexStr,"19432"));
+		System.out.println(Pattern.matches(regexStr,"519Ah"));
+
+		//matches 10-digit numbers only
+		regexStr = "^[0-9]{10}$";
+		System.out.println(Pattern.matches(regexStr,"6576767"));
+		System.out.println(Pattern.matches(regexStr,"9784561300"));
+		System.out.println(Pattern.matches(regexStr,"F784561300"));
+
+		//matches numbers and dashes, any order really.
+		regexStr = "^[0-9\\-]*$";
+		System.out.println(Pattern.matches(regexStr,"97-8456-13-0-0"));
+		System.out.println(Pattern.matches(regexStr,"9-7-8-4-5-6-1-3-0-0"));
+
+		//matches 9999999999, 1-999-999-9999 and 999-999-9999
+		regexStr = "^(1\\-)?[0-9]{3}\\-?[0-9]{3}\\-?[0-9]{4}$";
+		System.out.println(Pattern.matches(regexStr,"9784561300"));
+		System.out.println(Pattern.matches(regexStr,"9-784561300"));
+		System.out.println(Pattern.matches(regexStr,"978-456-1300"));
+		System.out.println(Pattern.matches(regexStr,"97-8456-13-0-0"));
+	}
+}