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The following commit(s) were added to refs/heads/master by this push:
     new 7abda6d  ARROW-3527: [R] remove unused variables
7abda6d is described below

commit 7abda6d089845045b39606d4f7a30f4d19f5622c
Author: James Lamb <[email protected]>
AuthorDate: Tue Oct 16 21:51:44 2018 -0400

    ARROW-3527: [R] remove unused variables
    
    I'm so excited about the Arrow R package! Started working with it tonight 
to see where I may be able to help.
    
    While doing this, I noticed a few "unused variable" compiler warnings.
    
    ```
    DataType.cpp:118:7: warning: unused variable 'n' [-Wunused-variable]
    int n = x.size();
    
    RecordBatch.cpp:132:7: warning: unused variable 'nc' [-Wunused-variable]
    int nc = tbl.size();
    ```
    
    Please consider this PR to remove the offending lines.
    
    Author: James Lamb <[email protected]>
    
    Closes #2768 from jameslamb/unused_variables and squashes the following 
commits:
    
    bee588390 <James Lamb> ARROW-3527:  remove unused variables
---
 r/src/DataType.cpp    | 1 -
 r/src/RecordBatch.cpp | 1 -
 2 files changed, 2 deletions(-)

diff --git a/r/src/DataType.cpp b/r/src/DataType.cpp
index bd0b4b9..ab9351b 100644
--- a/r/src/DataType.cpp
+++ b/r/src/DataType.cpp
@@ -115,7 +115,6 @@ SEXP list__(SEXP x) {
 
 template <typename T>
 std::vector<std::shared_ptr<T>> List_to_shared_ptr_vector(List x) {
-  int n = x.size();
   std::vector<std::shared_ptr<T>> vec;
   for (SEXP element : x) {
     vec.push_back(as<std::shared_ptr<T>>(element));
diff --git a/r/src/RecordBatch.cpp b/r/src/RecordBatch.cpp
index 2dd47d2..cd05bc0 100644
--- a/r/src/RecordBatch.cpp
+++ b/r/src/RecordBatch.cpp
@@ -129,7 +129,6 @@ std::shared_ptr<arrow::RecordBatch> 
RecordBatch__from_dataframe(DataFrame tbl) {
   std::vector<std::shared_ptr<arrow::Field>> fields;
   std::vector<std::shared_ptr<arrow::Array>> arrays;
 
-  int nc = tbl.size();
   for (int i = 0; i < tbl.size(); i++) {
     arrays.push_back(Array__from_vector(tbl[i]));
     fields.push_back(

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