From 07fd22914ba845be72c696f0078a072e903581a2 Mon Sep 17 00:00:00 2001
From: Victor <annimon119@gmail.com>
Date: Tue, 2 Aug 2016 21:29:41 +0300
Subject: [PATCH] =?UTF-8?q?=D0=94=D0=BE=D0=B1=D0=B0=D0=B2=D0=BB=D0=B5?=
 =?UTF-8?q?=D0=BD=20=D0=BC=D0=B5=D1=82=D0=BE=D0=B4=20ifPresent=20=D0=B4?=
 =?UTF-8?q?=D0=BB=D1=8F=20MapValue?=
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---
 src/main/java/com/annimon/ownlang/lib/MapValue.java | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/main/java/com/annimon/ownlang/lib/MapValue.java b/src/main/java/com/annimon/ownlang/lib/MapValue.java
index 40ba519..5d3d33e 100644
--- a/src/main/java/com/annimon/ownlang/lib/MapValue.java
+++ b/src/main/java/com/annimon/ownlang/lib/MapValue.java
@@ -5,6 +5,7 @@ import java.util.HashMap;
 import java.util.Iterator;
 import java.util.Map;
 import java.util.Objects;
+import java.util.function.Consumer;
 
 /**
  *
@@ -31,6 +32,18 @@ public class MapValue implements Value, Iterable<Map.Entry<Value, Value>> {
         this.map = map;
     }
 
+    public boolean ifPresent(String key, Consumer<Value> consumer) {
+        return ifPresent(new StringValue(key), consumer);
+    }
+
+    public boolean ifPresent(Value key, Consumer<Value> consumer) {
+        if (map.containsKey(key)) {
+            consumer.accept(map.get(key));
+            return true;
+        }
+        return false;
+    }
+
     public ArrayValue toPairs() {
         final int size = map.size();
         final ArrayValue result = new ArrayValue(size);