Split LibMatrix into separate repo

1 files changed, 33 insertions, 0 deletions

diff --git a/LibMatrix/Extensions/DictionaryExtensions.cs b/LibMatrix/Extensions/DictionaryExtensions.cs
new file mode 100644

index 0000000..fbc5cf5
--- /dev/null
+++ b/LibMatrix/Extensions/DictionaryExtensions.cs
@@ -0,0 +1,33 @@
+namespace LibMatrix.Extensions;
+
+public static class DictionaryExtensions {
+    public static bool ChangeKey<TKey, TValue>(this IDictionary<TKey, TValue> dict,
+        TKey oldKey, TKey newKey) {
+        TValue value;
+        if (!dict.Remove(oldKey, out value))
+            return false;
+
+        dict[newKey] = value; // or dict.Add(newKey, value) depending on ur comfort
+        return true;
+    }
+
+    public static Y GetOrCreate<X, Y>(this IDictionary<X, Y> dict, X key) where Y : new() {
+        if (dict.TryGetValue(key, out var value)) {
+            return value;
+        }
+
+        value = new Y();
+        dict.Add(key, value);
+        return value;
+    }
+
+    public static Y GetOrCreate<X, Y>(this IDictionary<X, Y> dict, X key, Func<X, Y> valueFactory) {
+        if (dict.TryGetValue(key, out var value)) {
+            return value;
+        }
+
+        value = valueFactory(key);
+        dict.Add(key, value);
+        return value;
+    }
+}