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Darrell Ulm Wordpress Profile Pages

Looking into Drupal to Wordpress migrations, and WP to Drupal imports and different ways to do the database migration with Drupal views or Ubercart and how it can work with WooComerce. Also looking into other Wordpress plug-ins and API for custom plug-ins. Here are the Wordpress profile links for Darrell Ulm :
Darrell Ulm Wordpress Support User Profile
Main Darrell Ulm Wordpress Profile

Tumblr, Wordpress

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Apache Spark Knapsack Approximation Algorithm in Python

The code shown below computes an approximation algorithm, greedy heuristic, for the 0-1 knapsack problem in Apache Spark. Having worked with parallel dynamic programming algorithms a good amount, wanted to see what this would look like in Spark.

The Github code repo. for the Knapsack approximation algorithms is here, and it includes a Scala solution. The work on a Java version is in progress at time of this writing.

Below we have the code that computes the solution that fits within the knapsack W for a set of items each with it's own weight and profit value. We look to maximize the final sum of selected items profits while not exceeding the total possible weight, W.

First we import some spark libraries into Python.

# Knapsack 0-1 function weights, values and size-capacity. from pyspark.sql import SparkSession from pyspark.sql.functions import lit from pyspark.sql.functions import col from pyspark.sql.functions import sum
Now define the function, which will take a Spark Dataframe w…