Spark SQL alternatives to groupby/pivot/agg/collect_list using foldLeft & withColumn so as improve performance

I have a Spark DataFrame consisting of three columns: id | col1 | col2 —————– x | p1 | a1 —————– x | p2 | b1 —————– y | p2 | b2 —————– y | p2 | b3 —————– y | p3 | c1 After applying df.groupBy(“id”).pivot(“col1”).agg(collect_list(“col2”)) I am getting the following dataframe (aggDF): +—+—-+——–+—-+…

Details

MutationObserver duplicating the callback function

I have a MutationObserver inside an onClick function, as the children within change onClick of the targetNode. However, whenever there is a change onClick, the callback function in the MutationObserver stacks or keeps the previous targetNode. For example on the first click <div class=”info”>…</div> console.logs, on the next click <div class=”info”>…</div><div class=”info”>…</div> console.logs and so…

Details

Can’t understand the way BasicActivity project shows the layout it auto generated

I’m pretty new with Android. I’m trying the understand the look that is shown from the auto-generated xml code when creating Basic Activity project. The files that are auto generated: 1.activity_main: <?xml version=”1.0″ encoding=”utf-8″?> <androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android=”http://schemas.android.com/apk/res/android” xmlns:app=”http://schemas.android.com/apk/res-auto” xmlns:tools=”http://schemas.android.com/tools” android:layout_width=”match_parent” android:layout_height=”match_parent” tools:context=”.MainActivity”> <com.google.android.material.appbar.AppBarLayout android:layout_width=”match_parent” android:layout_height=”wrap_content” android:theme=”@style/AppTheme.AppBarOverlay”> <androidx.appcompat.widget.Toolbar android:id=”@+id/toolbar” android:layout_width=”match_parent” android:layout_height=”?attr/actionBarSize” android:background=”?attr/colorPrimary” app:popupTheme=”@style/AppTheme.PopupOverlay” /> </com.google.android.material.appbar.AppBarLayout> <include layout=”@layout/content_main”…

Details

Alias to custom path

I have AWS ELB DNS name(Testing-QA-7849049.ap-south-1.elb.amazonaws.com) which has routing configured based on path eg : Testing-QA-7849049.ap-south-1.elb.amazonaws.com/qa/index.html —> will point to qa server Testing-QA-7849049.ap-south-1.elb.amazonaws.com/qa1/index.html –> will point to qa1 server Now i want my custome domain to be alias for this name . eg : Testing-QA-7849049.ap-south-1.elb.amazonaws.com/qa/index.html —> mydomain/index.html how can i achieve this . Go daddy…

Details