amol- commented on a change in pull request #135:
URL: https://github.com/apache/arrow-cookbook/pull/135#discussion_r797521878
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File path: java/source/data.rst
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@@ -0,0 +1,360 @@
+=================
+Data manipulation
+=================
+
+Recipes related to compare, filtering or transforming data.
+
+.. contents::
+
+Compare Vectors for Field Equality
+==================================
+
+.. testcode::
+
+ import org.apache.arrow.vector.IntVector;
+ import org.apache.arrow.vector.compare.TypeEqualsVisitor;
+ import org.apache.arrow.memory.RootAllocator;
+
+ RootAllocator rootAllocator = new RootAllocator(Long.MAX_VALUE);
+ IntVector right = new IntVector("int", rootAllocator);
+ right.allocateNew(3);
+ right.set(0, 10);
+ right.set(1, 20);
+ right.set(2, 30);
+ right.setValueCount(3);
+ IntVector left1 = new IntVector("int", rootAllocator);
+ IntVector left2 = new IntVector("int2", rootAllocator);
+ TypeEqualsVisitor visitor = new TypeEqualsVisitor(right);
+
+ System.out.println(visitor.equals(left1));
+ System.out.println(visitor.equals(left2));
+
+.. testoutput::
+
+ true
+ false
+
+Compare Values on the Array
Review comment:
I think we might also want a recipe that show usage of
`VectorEqualsVisitor` to show readers how to compare arrays themselves. I guess
it should probably be the first recipe in this chapter.
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