Prefer std::deque to std::vector when the size of the collection is unknow.
Suppose set A and B are two set with the same type
and set C is another set with the same value type but a different comparison function,
then it is still valid to insert …
This articles talks about special characters to avoid in various places. You might not encounter issues most of the time when violating rules stated below, however, you never know when things will break. It is more for a good-practice suggestion.
No deduplication is done (to be efficient) when unioning RDDs/DataFrames in Spark 2.1.0+.
Union 2 RDDs.
df1.union(df2)
// or for old-fashioned RDD
rdd1.union(rdd_2)
Union multiple RDDs.
df = spark.union([df1, df2, df3]) // spark is a SparkSession object
// or for old-fashioned RDD
rdd …JPype, py4j and PyJNIus are all good options for Java interface for Python. Jpype is easy to use and widely adopted. PyJNIus is an even easier solution compred to JPype. py4j is more complicated to use compared to JPype and PyJNIus, however, it has a better performance, generally speaking.
The GIL is controversial because it prevents multithreaded CPython programs from taking full advantage of multiprocessor systems in certain situations. Note that potentially blocking or long-running operations, such as I/O, image processing, and NumPy number crunching, happen outside the GIL. Therefore it is only in multithreaded programs that spend …