Tutorial by Examples: u

Live upcase server that returns error when input string is longer than 10 characters. Server: const express = require('express'), jsonParser = require('body-parser').json(), app = express(); // Add headers to work with elm-reactor app.use((req, res, next) => { res.setHeader...
DescriptionCodeAssign immutable int valueval x = 3Assign mutable int valuevar x = 3Assign immutable value with explicit typeval x: Int = 27Assign lazily evaluated valuelazy val y = print("Sleeping in.")Bind a function to a nameval f = (x: Int) => x * xBind a function to a name with expl...
To use an in memory cache in your ASP.NET application, add the following dependencies to your project.json file: "Microsoft.Extensions.Caching.Memory": "1.0.0-rc2-final", add the cache service (from Microsoft.Extensions.Caching.Memory) to ConfigureServices method in Startup...
If you have a dataframe with missing data (NaN, pd.NaT, None) you can filter out incomplete rows df = pd.DataFrame([[0,1,2,3], [None,5,None,pd.NaT], [8,None,10,None], [11,12,13,pd.NaT]],columns=list('ABCD')) df # Output: # A B ...
In barplot, factor-levels are placed on the x-axis and frequencies (or proportions) of various factor-levels are considered on the y-axis. For each factor-level one bar of uniform width with heights being proportional to factor level frequency (or proportion) is constructed. The barplot() function...
The Vector3 structure contains some static variables that provide commonly used Vector3 values. Most represent a direction, but they can still be used creatively to provide additional functionality. Vector3.zero and Vector3.one Vector3.zero and Vector3.one are typically used in connection to a...
JSX is not meant to be interpreted by the browser. It must be first transpiled into standard Javascript. To use JSX you need to install the plugin for babel babel-plugin-transform-vue-JSX Run the Command below: npm install babel-plugin-syntax-jsx babel-plugin-transform-vue-jsx babel-helper-vue-jsx...
The code below calculates the value of PI using a recursive approach. Modify the MAX_PARALLEL_RECURSIVE_LEVEL value to determine at which recursion depth stop creating tasks. With this approach to create parallelism out of recursive applications: the more tasks you create, the more parallel tasks cr...
Detailed instructions on getting sonata-admin set up or installed.
`This way you will get the newest ruby but it has its downsides. Doing it like this ruby will not be managed by any application. !! Remember to chagne the version so it coresponds with your !! you need to download a tarball find a link on an official website (https://www.ruby-lang.org/en/downloa...
Probably the easiest choice, but beware, the version is not always the newest one. Just open up terminal and type (depending on your distribution) in Debian or Ubuntu using apt $> sudo apt install ruby in CentOS, openSUSE or Fedora $> sudo yum install ruby You can use the -y option so...
Probably the easies way to set up ruby on windows is to go to http://rubyinstaller.org/ and from there donwload an executable that you will install. You don't have to set almost anything, but there will be one important window. It will have a check box saying Add ruby executable to your PATH. Confi...
First UC in the example Gems $> gem install nokogiri can have a problem installing gems because we don't have the permissions for it. This can be sorted out in more then just one way. First UC solution a: U can use sudo. This will install the gem for all the users. This method should be frowne...
Consider the ranges A1:A3 and B1:B3 having the same size and only number values, as below =SUMPRODUCT(A1:A3,B1:B3) This will loop through the ranges, taking the product of values in the same row and summing them, returning 32 in this example. A1*B1 = 4 A2*B2 = 10 A3*B3 = 18
Consider the following ranges A1:A3 and B1:B3 as below =SUMPRODUCT(--(A1:A3="c"),B1:B3) This will first manipulate (A1:A3="c") into the following array A1="c" = FALSE A2="c" = FALSE A3="c" = TRUE Then apply the -- operator which converts...
Go to https://bitbucket.org/dashboard/overview Login to your Bitbucket account Choose repositories from the top menu, then choose Create Repository Choose the owner, enter the repository name and select if you want to have it public or private repository Choose the repository type (Git or Merc...
Sometimes you need to make a script for someone but you are not sure what he has on his machine. Is there everything that your script needs? Not to worry. Bundler has a great function called in line. It provides a gemfile method and before the script is run it downloads and requires all the necessa...
In [1]: import pandas as pd import numpy as np arrays = [['bar', 'bar', 'baz', 'baz', 'foo', 'foo', 'qux', 'qux'], ['one', 'two', 'one', 'two', 'one', 'two', 'one', 'two']] idx_row = pd.MultiIndex.from_arrays(arrays, names=['Row_First', 'Row_Second']) idx_col = pd.MultiIndex.from_pro...
Unlike the .xs method, this allows you to assign values. Indexing using slicers is available since version 0.14.0. In [1]: import pandas as pd import numpy as np arrays = [['bar', 'bar', 'baz', 'baz', 'foo', 'foo', 'qux', 'qux'], ['one', 'two', 'one', 'two', 'one', 'two', 'one', 'two'...
Add the autodoc module in the extensions list present in the conf.py file at the root of your documentation: extensions = [ 'sphinx.ext.autodoc', ... ]

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