Github user JoshRosen commented on the pull request:

    https://github.com/apache/spark/pull/4292#issuecomment-72603547
  
    For example:
    
    ```scala
    15/02/02 22:49:12 INFO SparkILoop: Created spark context..
    Spark context available as sc.
    
    scala> import org.apache.hadoop.mapred.{FileInputFormat, InputFormat, 
JobConf, SequenceFileInputFormat, TextInputFormat}
    import org.apache.hadoop.mapred.{FileInputFormat, InputFormat, JobConf, 
SequenceFileInputFormat, TextInputFormat}
    
    scala> import org.apache.hadoop.conf.Configuration
    import org.apache.hadoop.conf.Configuration
    
    scala> val conf = new Configuration()
    conf: org.apache.hadoop.conf.Configuration = Configuration: 
core-default.xml, core-site.xml, mapred-default.xml, mapred-site.xml
    
    scala> val jobConf = new JobConf(conf)
    jobConf: org.apache.hadoop.mapred.JobConf = Configuration: 
core-default.xml, core-site.xml, mapred-default.xml, mapred-site.xml
    
    scala> jobConf.getInt("myInt", 0)
    res3: Int = 0
    
    scala> conf.setInt("myInt", 1)
    
    scala> jobConf.getInt("myInt", 0)
    res5: Int = 0
    ```


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