racl101 + between   29

login - How to switch between users on one terminal? - Unix & Linux Stack Exchange
The good thing about this answer is that it lets you know how to get it done with su instead of the sudo command (assuming that it's not available, which is often the case in Docker containers.)
Unix.stackexchange  stackexchange  howto  switch  between  users  terminal  shell  session  example  guide  reference  sudo  su  command  tolearn  totry  tounderstand  docker 
november 2018 by racl101
php - belongsToMany relationship in Laravel across multiple databases - Stack Overflow
Someone figured out how to do a relationship column / property between two models (with pivot table), i.e. belongsToMany where the second model might have a dynamic database connection (i.e. it's not the same each time a query is done). So they figured out howto obtain the database for the current database connection (i.e. the current PHP script execution).
stackoverflow  laravel  laravel5  howto  belongstomany  model  relationship  property  column  between  different  database  connections  example  guide  reference  pivot  table 
may 2018 by racl101
State Management — Vue.js
Use Vuex to handle state management in your application. That is, if you have a complicated application, such as a single application and you don't want one particular parent component to handle the state, i.e. be the source of truth, you can use Vuex which is Vue's implementation of Flux architecture, to manage state so that all your Vue components get its source of truth from one place. The official documentation (in English) for Vuex can be found here: https://vuex.vuejs.org/en/
vuejs  vue  vue2  state  management  vuex  flux  between  components  single  ultimate  source  of  truth  guide  reference  documentation  tutorial  toread  tolearn  tounderstand 
may 2018 by racl101
Force composer to require PHP Version between Version X and Version Y - Stack Overflow
Need to read and understand this, thought it doesn't address my immediate issues whereby, if provision a Ubuntu 16.04 server that runs PHP 7.0, but my local PHP version is PHP 7.1 or 7.2 it cause issues when I deploy the code that downloads well with composer install locally but not on the production server.
stackoverflow  explanation  bestpractices  best  practices  composer  require  php  version  between  toread  tounderstand 
april 2018 by racl101
numpy.random.randint — NumPy v1.14 Manual
useful method for getting either an array or a 2D matrix of randomly generated integers between two numbers.


Get a Numpy array of 100 numbers between 0 and 50

arr1 = np.random.randint(0,50, 100)

Now, suppose you want that same data in a 5 by 10 matrix. You can do this like so:

matrix_1 = arr1.reshape(5,10)
numpy  documentation  guide  reference  random  randint  method  generate  integers  between  minimum  maximum  rows  columns  shape  howto  example 
april 2018 by racl101
How to select rows in a DataFrame between two values, in Python Pandas? - Stack Overflow
If you want to derive a dataframe containing all values in any given row, column position between two numbers you can do this:

newdf = df[(df >= val1) & (df <=val2)]

it will return a new dataframe with same shape (same row and column count) but any value that doesn't fall between val1 and val2 it replaces with an NaN value.
stackoverflow  howto  pandas  python  python2.7  select  filter  rows  dataframe  between  two  values  example  guide  reference  named  columns  labelled 
april 2018 by racl101
MySQL :: MySQL 5.7 Reference Manual :: 13.3.2 Comparison Functions and Operators
It returns 1 for true or 0 if not true. You can use result within an if like so: SELECT IF(5 BETWEEN 1 AND 10, 'yes it is', 'no it is not'); would return "yes it is".
Guide  example  Mysql  compare  operator  between  Tutorial  ReferencE  Documentation  Howto 
november 2016 by racl101

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