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Mastering Development System & Network

Telnet issues between docker networks

in a host machine (its LAN ip is 192.168.0.94), I have the following services 1) mysql , its docker-compose.yml is as below. It creates a bridge network called mysql_default,it is assigned a VIP 172.24.0.2 version: ‘2’ services: mysql: image: mysql:5.7 restart: always container_name: mysql volumes: – /etc/localtime:/etc/localtime – /data/mysql:/var/lib/mysql ports: – 3306:3306 2) nacos, its […]

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Development

MATLAB: Does there exist a smart way to remove adjacent (x,y) points stored in some array?

Does there? I am thinking specifically about some matrix array where the rows correspond to x and y coordinates, e.g. 4 3 4 5 5 4 3 4 4 4 such that (4,3) and (4,5) etc. are (x,y) points. The problem is this: If one of the points in the list is surrounded adjacently by […]

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Development

Logistic regression using customer survey data in Python

I have a project which I’m not sure how to implement. I need to build a logistic regression using customer survey data to predict NPS (actually, the coefficients are more important for this use case). I feel confident using various machine learning data sets, but I have several concerns about customer survey data. My questions […]

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Development

MySQL – Array in cell

My scenario is that I have a table that stores classes at a school. Each class is a row in the table. One of the fields in there is the class period that the class is offered in. Some are only offered one period, some are offered multiple periods, some are offered every period. In […]

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Development

MySQL – Array in cell

My scenario is that I have a table that stores classes at a school. Each class is a row in the table. One of the fields in there is the class period that the class is offered in. Some are only offered one period, some are offered multiple periods, some are offered every period. In […]

Categories
Development

Most efficient way of storing objects with corresponding indices

I want to store a collection of Points, which are objects of the class Point. (Point contains properties as positionX, positionY, electricalPotential, etc.) Each of them should have an index i, but the don’t need to be ordered in any way. This is why I used a dictionary Dictionary<int, Point> meshpoints in the first place. […]

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Development

Pair elements from lists of list to form a new list

I have a list of lists like the following, a = [[ [1,2], [10, 3]], [[4,5], [6, 7]]] I need to pair the inner most list elements this way, a = [[[1, 10], [2, 3]], [[4, 6], [5, 7]]]. The straighforward approach would be the following, pairings_ = [] for ind in a: pairings_.append([[x, y] […]

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Development

Does numpy treat 1-D slices of arrays in a strange way?

import numpy as np a = np.array([[(1, 2, 3), 40, 50], [(4, 5, 6), 70, 80]]) Using only numpy operations (i.e., without explicit python-style list construction or loops; the goal is to save time, if possible), how do I create a 2-by-3 numpy array (matrix) [[1,2,3], [4,5,6]] from the above array a? The slice a[:, […]