Github user andralungu commented on a diff in the pull request:
https://github.com/apache/flink/pull/452#discussion_r26487168
--- Diff:
flink-staging/flink-gelly/src/main/java/org/apache/flink/graph/example/EuclideanGraphExample.java
---
@@ -0,0 +1,231 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.graph.example;
+
+import org.apache.flink.api.common.ProgramDescription;
+import org.apache.flink.api.common.functions.MapFunction;
+import org.apache.flink.api.java.DataSet;
+import org.apache.flink.api.java.ExecutionEnvironment;
+import org.apache.flink.api.java.tuple.Tuple3;
+import org.apache.flink.graph.Edge;
+import org.apache.flink.graph.Graph;
+import org.apache.flink.graph.Triplet;
+import org.apache.flink.graph.Vertex;
+import org.apache.flink.graph.example.utils.EuclideanGraphData;
+
+import java.io.Serializable;
+
+/**
+ * Given a directed, unweighted graph, with vertex values representing
points in a plan,
+ * return a weighted graph where the edge weights are equal to the
Euclidean distance between the
+ * src and the trg vertex values.
+ *
+ * <p>
+ * Input files are plain text files and must be formatted as follows:
+ * <ul>
+ * <li> Vertices are represented by their vertexIds and vertex
values and are separated by newlines,
+ * the value being formed of two doubles separated by a comma.
+ * For example: <code>1,1.0,1.0\n2,2.0,2.0\n3,3.0,3.0\n</code>
defines a data set of three vertices
+ * <li> Edges are represented by triples of srcVertexId,
srcEdgeId, weight which are
+ * separated by commas. Edges themselves are separated by
newlines. The initial edge value will be overwritten.
+ * For example: <code>1,2,13.0\n1,3,6.0\n</code> defines two edges
1-2 and 1-3 having
+ * weights 13 and 6 respectively.
+ * </ul>
+ * </p>
+ *
+ * Usage <code>EuclideanDistanceExample <vertex path> <edge
path> <result path></code><br>
+ * If no parameters are provided, the program is ran with default data from
--- End diff --
I know that's how it's written in the other examples, but according to my
English, it's "is ran".
It's either
"If no parameters are provided, run the program..." or "the program is ran
with default data"
But I can change it if it's a problem...
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