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Linux Mastering Development Ubuntu

Modifying keyboard layout in ubuntu 20

My hp notebook has a german keyboard that seems to be a relabled version of a us keyboard. Because of this it lacks the <>| key that is usually located right of l-shift on german keyboards. This is obviously very annoying and so far I haven’t been able to find an alternative key kombination that […]

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Database Development

Unable to create partial indexes using bloom

I’m new to bloom indexes and currently my table has 3 partial indexes for the same column in the WHERE clause and with different column combinations for the same table. I was trying to replace them all with 1 bloom index. However, when I create a bloom index with WHERE clause using below syntax, I […]

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Mastering Development

Await the completion of a for-loop

I am trying to write some React code that handles client uploading of files. I handle the image resizing in the frontend, hence I need to make use of FileReader to convert the File object into base64 and subsequently into an Image to check the dimensions, via the callback function. All the console.log inside the […]

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Database Development

Unable to create partial indexes using bloom

I’m new to bloom indexes and currently my table has 3 partial indexes for the same column in "where" clause and with different column combinations for the same table. I was trying to replace them all with 1 bloom index. However, when I’m creating bloom index with where clause using below syntax – I’m getting […]

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Mastering Development

How to show different listviews from pressing the item of a diffrent listview in the same screen in Flutter?

Suppose, I have a list List1 = [A,E,M,X] which I can show using listview.builder horizontally. I have some other lists such as List2 = [a,b,c,d], List3 = [e,f,g,h] etc which I can show under the listview of List1 on a similar way. What I want is whenever a user presses A from List1, the below […]

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Mastering Development

easyprocess.EasyProcessError: start error (oserror=[Error 2] The system cannot find the file specified) Python 2.7

I tried to find relevant question, but it does not seem to fix my problem. I am currently running a program using easyprocess module on python2.7 on MS Windows10, using Anaconda. DIR = D:\WORKSPACE\Project\PROGRAMS if verbose: print "Calling sprep96" cmd = os.path.join(DIR, ‘sprep96’) p = EasyProcess(‘"{}" -M model -PARR periods -NMOD 1 -R’.format(cmd)).call() sprep96 is […]

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Ask Biology

Do ants know the direct (approximately shortest) path to their nest from the food morsel?

I’ve been studying a bit on the foraging habits of ants, and one of the things I’m not clear on is whether ants know the shortest path from the food that they find to their nest. I understand that ants can leave different types of pheromones$^{[1,2]}$, they can change their behavior based on those trails, […]

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Ask Chemistry

Hydrolysis of phosphoryl-oximes

When acetylcholinesterase that has been inhibited by an organophosphorus compound is reactivated by an oxime, a phosphoryl-oxime is formed, which is then somehow hydrolyzed in the blood. One study suggested that enzymes of the paraoxonase family are responsible [1], while another suggested that this may not be so [2]. What is/are the pathway(s) by which […]

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Mastering Development

How to create a table using a list of lists

I’m trying to write a file where you have 2 rows, with the first row being numbers and the 2nd row being letters. As an example, I was trying to do this with the alphabet. list1=[‘A’,’B’,’C’,’D’,’E’,’F’,’G’,’H’,’I’,’J’,’K’,’L’,’M’,’N’,’O’,’P’,’Q’,’R’,’S’,’T’,’U’,’V’,’W’,’X’,’Y’,’Z’] list2=list1+list1 abcList = [[],[]] for i in range(len(list2)): i+=1 if i % 5 == 0: if i>=10: abcList[0].append(str(i) + […]

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Mastering Development

How do i join 4 tables in sql

Hi there I am a beginner in SQL coding and recently got an assignment from my teacher that I am not too sure how to do. If someone could help me by explaining what to do and how to do it. The assignment is: As we have found the limitation of the 3 table system […]