From 7738781bb54b6fb86b1c7dfb10464bb26ffdf9a0 Mon Sep 17 00:00:00 2001
From: lluni <llunii+gitea@pm.me>
Date: Mon, 23 May 2022 19:07:12 +0200
Subject: [PATCH] Added some utility functions (not yet needed)

---
 build.gradle                 |  1 +
 src/main/java/Utilities.java | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+)
 create mode 100644 src/main/java/Utilities.java

diff --git a/build.gradle b/build.gradle
index 9100d7c..a85b811 100644
--- a/build.gradle
+++ b/build.gradle
@@ -11,6 +11,7 @@ repositories {
 
 dependencies {
     implementation 'org.ejml:ejml-all:0.41'
+    implementation 'com.opencsv:opencsv:5.6'
     testImplementation 'org.junit.jupiter:junit-jupiter-api:5.8.2'
     testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine:5.8.2'
 }
diff --git a/src/main/java/Utilities.java b/src/main/java/Utilities.java
new file mode 100644
index 0000000..f444927
--- /dev/null
+++ b/src/main/java/Utilities.java
@@ -0,0 +1,33 @@
+import com.opencsv.CSVReader;
+import com.opencsv.exceptions.CsvValidationException;
+import org.ejml.simple.SimpleMatrix;
+
+import java.io.FileReader;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class Utilities {
+    public static SimpleMatrix ones(int rows, int columns) {
+        SimpleMatrix mat = new SimpleMatrix(rows, columns);
+        Arrays.fill(mat.getDDRM().data, 1);
+        return mat;
+    }
+
+    public static List<List<String>> readCSV(String filename) {
+        List<List<String>> entries = new ArrayList<>();
+        try (CSVReader csvReader = new CSVReader(new FileReader(filename))) {
+            String[] values;
+            while ((values = csvReader.readNext()) != null) {
+                entries.add(Arrays.asList(values));
+            }
+            return entries;
+        } catch (IOException e) {
+            System.out.println(filename + " does not exist");
+        } catch (CsvValidationException e) {
+            System.out.println("Invalid line in " + filename);
+        }
+        return null;
+    }
+}