README.md in kraps-0.8.0 vs README.md in kraps-0.9.0

@@ -36,20 +36,25 @@
 )
 ```
 
 Afterwards, create a job class, which tells Kraps what your job should do.
 Therefore, you create some class with a `call` method, and optionally some
-arguments. Let's create a simple job, which reads search log files to analyze
-how often search queries have been searched:
+arguments passed to its initializer. Let's create a simple job, which reads
+search log files to analyze how often search queries have been searched:
 
 ```ruby
 class SearchLogCounter
-  def call(start_date:, end_date:)
+  def initialize(start_date:, end_date:)
+    @start_date = start_date
+    @end_date = end_date
+  end
+
+  def call
     job = Kraps::Job.new(worker: MyKrapsWorker)
 
     job = job.parallelize(partitions: 128) do |collector|
-      (Date.parse(start_date)..Date.parse(end_date)).each do |date|
+      (Date.parse(@start_date)..Date.parse(@end_date)).each do |date|
         collector.call(date.to_s)
       end
     end
 
     job = job.map do |date, _, collector|
@@ -212,10 +217,14 @@
     collector.call(item)
   end
 end
 ```
 
+Please note, that `parallelize` itself is not parallelized but rather
+parallelizes the data you feed into Kraps within `parallelize` by splitting it
+into the number of `partitions` specified.
+
 The block must use the collector to feed Kraps with individual items. The
 items are used as keys and the values are set to `nil`.
 
 * `map`: Maps the key value pairs to other key value pairs
 
@@ -343,14 +352,19 @@
 each other. Let's assume that we additionally want to calculate a total number
 of searches made:
 
 ```ruby
 class SearchLogCounter
-  def call(start_date:, end_date:)
+  def initialize(start_date:, end_date:)
+    @start_date = start_date
+    @end_date = end_date
+  end
+
+  def call
     count_job = Kraps::Job.new(worker: SomeBackgroundWorker)
 
     count_job = count_job.parallelize(partitions: 128) do |collector|
-      (Date.parse(start_date)..Date.parse(end_date)).each do |date|
+      (Date.parse(@start_date)..Date.parse(@end_date)).each do |date|
         collector.call(date.to_s)
       end
     end
 
     count_job = count_job.map do |date, _, collector|