Dependencies:
GNU Make Version > 3.80
an ISO/ ANSI C-Compiler (e.g. gcc)
an extractor like tar or gzip
zlib-devel
readline-devel oder libedit-devel
Sources:
Link to the latest source (9.6.3)
Now you can extract the source files:
tar -xzvf postgresql-9.6.3.tar.gz
There are a large ...
Part I : Setup the Mac machine to use shenzhen
Go to terminal
Install Shenzhen
sudo gem install shenzhen
sudo gem install nomad-cli
Download XCode command line utility
xcode-select --install
Popup shows up with the below text
The xcode-select command requires the command line d...
How to read a netCDF file (.nc) with python gdal ?
import gdal
# Path of netCDF file
netcdf_fname = "/filepath/PREVIMER_WW3-GLOBAL-30MIN.nc"
# Specify the layer name to read
layer_name = "hs"
# Open netcdf file.nc with gdal
ds = gdal.Open("NETCDF:{0}:{1}".f...
Ruby 2.3.0 added the safe navigation operator, &.. This operator is intended to shorten the paradigm of object && object.property && object.property.method in conditional statements.
For example, you have a House object with an address property, and you want to find the street_n...
Quite often there is a need to glimpse the chosen color palette. One elegant solution is the following self defined function:
color_glimpse <- function(colors_string){
n <- length(colors_string)
hist(1:n,breaks=0:n,col=colors_string)
}
An example of use
color_glimpse(...
Function colors() lists all the color names that are recognized by R. There is a nice PDF where one can actually see those colors.
colorRampPalette creates a function that interpolate a set of given colors to create new color palettes. This output function takes n (number) as input and produces a...
Before we get our hands dirty with code, I feel it is necessary to understand how data is stored in firebase. Unlike relational databases, firebase stores data in JSON format. Think of each row in a relational database as a JSON object (which is basically unordered key-value pair). So the column nam...
When you have a huge JSON database, adding a value event listener doesn't make sense. It will return the huge JSON and parsing it would be time consuming. In such cases we can use pagination and fetch part of data and display or process it. Kind of like lazy loading or like fetching old chats when u...
In [1]: df = pd.DataFrame({'A': [1, 2, 3], 'B': [1.0, 2.0, 3.0], 'C': ['a', 'b', 'c'],
'D': [True, False, True]})
In [2]: df
Out[2]:
A B C D
0 1 1.0 a True
1 2 2.0 b False
2 3 3.0 c True
Getting a python list from a series:
In [3]: df['...
The task is to find the length of the longest subsequence in a given array of integers such that all elements of the subsequence are sorted in ascending order. For example, the length of the longest increasing subsequence(LIS) for {15, 27, 14, 38, 26, 55, 46, 65, 85} is 6 and the longest increasing ...
Given a string what is the longest palindromic subsequence(LPS) of it? Let's take a string agbdba. The LPS of this string is abdba of length 5. Remember, since we're looking for subsequence, the characters need not to be continuous in the original string. The longest palindromic substring of the seq...
This chapter describes how to set up a Docker Container with Jenkins inside, which is capable of sending Docker commands to the Docker installation (the Docker Daemon) of the Host. Effectively using Docker in Docker. To achieve this, we have to build a custom Docker Image which is based on an arbitr...
You can also use this code to setup an LED with a button switch with a pull up resistor, this could preferably be with the next step after setting up the intial LED controller
int buttonState = 0; // variable for reading the pushbutton status
void setup()
{
// initialize the LED pin as an ...
Joda-Time is a robust alternative to the Java date and time classes.
Prior to Java SE 8, the standard Java date and time classes like java.util.Calendar are difficult to use and prone to errors. Joda-Time emerged as the de-facto standard library for date and time manipulation in many open-source-pr...
Using the library archive
Download the JAR and add it to the classpath for your Java project
Using a build tool
If you are using a build tool like Maven or Gradle:
Maven
<dependency>
<groupId>joda-time</groupId>
<artifactId>joda-time</artifactId>
...
Adding the aurelia-configuration to a cli application sometimes produces a build error. This is caused by a missing dependency so we simply add the dependency to the build bundle.
Try the following:
npm install deep-extend --save
npm install aurelia-configuration --save
Now add the followi...
The official site of angular-ui-bootstrap is here.
Follow the below instructions in order.
The list of files that are to be downloaded is in this link
Include all references in this order.
angular.js
angular-animate.js
ui-bootstrap-tpls-2.2.0.js (Reference to UI Bootstrap )
angular-sanitiz...
Two-element tuples
(,) is an example of a type that has a Bifunctor instance.
instance Bifunctor (,) where
bimap f g (x, y) = (f x, g y)
bimap takes a pair of functions and applies them to the tuple's respective components.
bimap (+ 2) (++ "nie") (3, "john") --> (5,...
