Categories
Mastering Development

How to divide an array into a tree of buckets sized by powers of two?

How do you take a number representing a list of items, and divide it into chunks, where the number of chunks is a power-of-two, AND where each chunk also has a power-of-two number of items (where size goes up to a max power of two, so 1, 2, 4, 8, 16, 32, 32 being the […]

Categories
Linux Mastering Development

when found blank line change to new column

I have a data as: q w e e r r t 23 21 1 Whenever we find blank line change it to new column. Output q,e,23 w,r,21 e,r,1 ,t, I have tried but neither with sed nor I am able to change the row. Please let me know how can we achieve this.

Categories
Mastering Development

Problem in saving specific file name in python 3

after running the following program in jupyter lab the saved file is (‘test_C0_s50_d’, 1, ‘t’, 2, ’18_l1w’), but I don’t want parenthesis, comma, and spaces in the file name. I want something similar to test_C0_s50_d1t2_18_l1w in the file name so that when changing i and j value I can find another name. i = 1 […]

Categories
Linux Mastering Development

Schedule jobs from a queue onto multiple threads

I have a function (func) that has to process all files in a set of directories (anything between 5-300 files). The number of parallel threads to be used is user-specified (usually 4). The idea is to start the func in 4 separate threads. And when one thread returns, I have to start processing the next […]

Categories
Mastering Development

Add cursor to plot in Matplotlib

I would like to add a cursor to Matplotlib as in this thread: Add cursor to matplotlib I tried to change that code to use the data I have stored in a csv, but with no success. I am using pandas and "read_csv" to import the contents of the file and then convert the data […]

Categories
Mastering Development

ReactWrapper can only wrap valid elements (material-ui – enzyme)

I’m writing a test for a component to test one of its functions, but I am getting an error: ShallowWrapper can only wrap valid elements The component file is as follows – TextInput.js: /* eslint-disable react/require-default-props */ import React from ‘react’ import PropTypes from ‘prop-types’ import { InputLabel, TextField } from ‘@material-ui/core’ const TextInput = […]

Categories
Mastering Development

Convert AMPL to CPLEX

The following constraints are written in the AMPL environment and I want to convert it to a CPLEX? subject to ex_one{b in B}: sum{t in T: t >= early[b]} y[b,t] <= 1; #subject to most_one{tt in T, b not in BT[tt]}: sum{t in T} y[b,t] <= 1; subject to grade1{t in T}: G_min*sum{b in B: […]

Categories
Mastering Development

File not being bind mounted to docker-compose

I am running a docker-compose test; part of my stack that will perform the actual tests is the following service tester: image: tutum/curl:latest volumes: – ./ci/wait-for-it.sh:/usr/local/bin/wait-for-it.sh – ./webhooks:/app/webhooks depends_on: – sut command: ["wait-for-it.sh", "sut:8080", "-t", "240", "–", "sh", "pytest /app/webhooks"] The command fails as follows: ERROR: for 0114c9206690_alerta-_tester_1 Cannot start service tester: OCI runtime create […]

Categories
Mastering Development

Why doesn’t this compound interest calculator work?

I’m trying to create a compound interest calculator using Java, so I copied the method from a website and added the questions to get user input myself: package example; import java.util.Scanner; public class example { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); System.out.println("whats the principal?"); int p = scanner.nextInt(); System.out.println("whats the […]

Categories
Mastering Development

Getting the inputted values in the array by passing a function

I am having some troubles in getting the inputted values in my array. We are required to create a function for the "methods". Let me explain it further. Here’s the full block of my code: using System; class LabExer { static void arrayVal(string[] arr) { for(int i = 0; i < arr.Length; i++) { Console.Write(arr[i] […]