1 files changed, 29 insertions, 0 deletions

diff --git a/src/ch/epfl/xblast/ArgumentChecker.java b/src/ch/epfl/xblast/ArgumentChecker.java
index 7e77b61..56f8acd 100644
--- a/src/ch/epfl/xblast/ArgumentChecker.java
+++ b/src/ch/epfl/xblast/ArgumentChecker.java
@@ -59,4 +59,33 @@ public final class ArgumentChecker {
         return s;
     }
 
+    /**
+     * Returns the element from the array at the requested index, or null if it cannot be retrieved.
+     *
+     * @param array the array
+     * @param index the index
+     * @param <T>   the type of element
+     * @return the requested element, or null
+     */
+    public static <T> T getOrNull(T[] array, int index) {
+        if (Objects.isNull(array) || index < 0 || index >= array.length)
+            return null;
+        else
+            return array[index];
+    }
+
+    /**
+     * Parses and returns an integer, or return null on error.
+     *
+     * @param str the integer to parse
+     * @return the parsed integer, or null
+     */
+    public static Integer parseIntOrNull(String str) {
+        try {
+            return Integer.parseInt(str);
+        } catch (NumberFormatException | NullPointerException e) {
+            return null;
+        }
+    }
+
 }