Kin | minimalistic tool to check

I am having a dataframe with station info including latitudes and longitudes as follows:

I'm trying to write a multi-threaded code that performs the sum of the elements of a vector.

The code is very simple:

• The threads are defined through a vector of threads;
• The number of threads is defined by the ThreadsSize variable;
• Using ThreadsSize equal to 1, the sum is performed in about 300ms, while using 8 threads in 1200ms.

I'm using an HW with 8 cores.

Can someone explain why this happens? Theroetically I would expect to have 300/8 ms in case 8 threads are used. Is it not correct?

Here the code:

I have two data frames and i want to compare the data of those two datasets in another dataframe.

my objective is to compare all column of two dataframes and also check their texts . i want to check both the data base are consistent.

Note: rows and column in both data frame can vary

I have two data frames of more than 200 columns and i want to create a summary to check if the names of columns are matching. i want o create a function for that.

i want to compare matching names of two data frame if they matching exactly then join them other with bind that in new row.

I'm new to Kotlin and I tried to search for a solution but I can't find one. I have these function that is inherited from an interface, and when I try to return the variable to fill up the empty variable it doesn't get passed from info 4. can someone please help me why it doesn't get passed?

I have a SAS Token in the form:

https://name.blob.core.windows.net/container?sv=2015-04-05&sr=b&sig=abc123&se=2017-03-07T12%3A58%3A52Z&sp=rw

I am attempting to use an Az Provided Cmdlet in Powershell to upload content to this blob. I am unable to find an API that simply takes the above SAS token and a file to upload.

Reading this reddit post it seems like my options are:

1. Parse out the StorageAccountName (in the example name), Container (in the example container) and SASToken (in the example above sv=2015-04-05&sr=b&sig=abc123&se=2017-03-07T12%3A58%3A52Z&sp=rw) and then use New-AzStorageContext/Set-AzStorageBlobContent. This more or less is the answer in this StackOverflow Post (Connect to Azure Storage Account using only SAS token?)
2. Use Invoke-WebRequest or its kin to basically perform the REST call myself.

I would like to use as many Az provided cmdlets possible so starting with option 1, there doesn't seem to be an API to parse this, the closest I can find is this StackOverflow Post (Using SAS token to upload Blob content) talking about using CloudBlockBlob, however it is unclear if this class is available to me in PowerShell.

To these ends I've created a Regex that appears to work, but is most likely brittle, is there a better way to do this?

I’m a beginner self-teaching Java Programmer. I’m trying to perfect my knowledge of OOPS and I’ve been trying to get pass this modifier issue in the past couple of days.

Please I need someone to peruse and explain to me what I’m doing wrong and how I should do it right.

CODE

I have a single csv file whose contents are as follows -

I have made a bar chart which aggregates my data, but is there any way I can split each bar based on the data it is aggregating - similar to how a stacked bar chart would look?

Here is a bad artists impression (thick blue lines mine). The idea is that it's important to know from looking at the graph if I sold 5 at £1, or 1 at £5.

Ideally this would work even if the price for each item is variable, but that is not essential (eg: if there is a 'hack' with hardcoding Apple = 3, I can live with that.)

I'm also fine inputting helper columns etc, within reason, but I would want to be able to easily continue to add things to the list on the left without having to add new helper columns each time (calculated ones are fine, of course.)

Thanks in advance.

UPDATE: With thanks to Kin Siang below, I ended up implementing a slightly modified version of their solution, which I am posting here for completeness.

I added a very large (but finite) number of helper columns to the right, with a formula in each cell which would look for the nth occurrence of the item in the main list (wrapped in an iferror to make the unused cells blank).