feat: move everything to single folder

cs2030s/Lab4/IsModEq.java

@@ -0,0 +1,27 @@
+/**
+ * A non-generic Immutator with parameter
+ * div and mod that takes in an integer val
+ * and return the boolean value by checking
+ * if the given value is equal to mod when
+ * divided by div.
+ * CS2030S Lab 4
+ * AY22/23 Semester 1
+ *
+ * @author Yadunand Prem (10B)
+ */
+
+class IsModEq implements Immutator<Boolean, Integer> {
+
+  private int div;
+  private int check;
+
+  public IsModEq(int div, int check) {
+    this.div = div;
+    this.check = check;
+  }
+
+  @Override
+  public Boolean invoke(Integer val) {
+    return val % div == check;
+  }
+}