Let's say your launch activity is called MainActivity, in your app com.example.myapp.
In the manifest:
<activity
android:name=".MainActivity"
>
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
...
Bridge pattern decouples abstraction from implementation so that both can vary independently. It has been achieved with composition rather than inheritance.
Bridge UML diagram from wikipedia:
You have four components in this pattern.
Abstraction: It defines an interface
RefinedAbstraction: It ...
SELECT SYSDATE();
This function returns the current date and time as a value in 'YYYY-MM-DD HH:MM:SS' or YYYYMMDDHHMMSS format, depending on whether the function is used in a string or numeric context. It returns the date and time in the current time zone.
SELECT NOW();
This function is a...
The dimension attribute on an object specifies that that object is an array. There are, in Fortran 2008, five array natures:1
explicit shape
assumed shape
assumed size
deferred shape
implied shape
Take the three rank-1 arrays2
integer a, b, c
dimension(5) a ! Explicit shape (default ...
- var friends = 10
case friends
when 0
p you have no friends
when 1
p you have a friend
default
p you have #{friends} friends
Result is:
<p>you have 10 friends</p>
If the value of the href-attribute begins with tel:, your device will dial the number when you click it. This works on mobile devices or on computers/tablets running software – like Skype or FaceTime – that can make phone calls.
<a href="tel:11234567890">Call us</a>
Most de...
SUB function allows to substitute text inside awk
sub(regexp, replacement, target)
where regexp could be a full regular expression
$ cat file
AAAAA
BBBB
CCCC
DDDD
EEEE
FFFF
GGGG
$ awk '{sub("AAA","XXX", $0); print}' file
XXXAA
BBBB
CCCC
DDDD
EEEE
FFFF
GGGG
...
A Range cannot be created or populated the same way a string would:
Sub RangeTest()
Dim s As String
Dim r As Range 'Specific Type of Object, with members like Address, WrapText, AutoFill, etc.
' This is how we fill a String:
s = "Hello World!"
' But we can...
Gnuplot is able to generate a graphic from a script file which allows for a sequence of commands necessary to draw a graphic to be executed in sequence instead of type in manually.
For the purpose of this example we'll create a simple script to draw a sin(x).
Create a script file
Create a file si...
(This is a request for a good example that shows how to construct a SELECT using CONCAT, then prepare+execute it. Please emphasize the use of @variables versus DECLAREd variables -- it makes a big difference, and it is something that novices (include myself) stumble over.)
# example data
DT = data.table(iris)
DT[, Bin := cut(Sepal.Length, c(4,6,8))]
summary is handy for browsing summary statistics. Besides direct usage like summary(DT), it can also be applied per-group conveniently with split:
lapply(split(DT, by=c("Species", "Bin"), drop=TRU...
# example data
DT = data.table(iris)
DT[, Bin := cut(Sepal.Length, c(4,6,8))]
To apply the same summarizing function to every column by group, we can use lapply and .SD
DT[, lapply(.SD, median), by=.(Species, Bin)]
# Species Bin Sepal.Length Sepal.Width Petal.Length Petal.Width
# 1...
To declare a bean, simply annotate a method with the @Bean annotation or annotate a class with the @Component annotation (annotations @Service, @Repository, @Controller could be used as well).
When JavaConfig encounters such a method, it will execute that method and register the return value as a b...
Setup Ruby On Rails on Ubuntu 16.04 Xenial Xerus
All commands should be run in Linux terminal (hotkey: Ctrl + Alt + T)
You need to install Ruby on your local machine in development environment.
The first step is to install some dependencies for Ruby.
sudo apt-get update
sudo apt-get install git...
JUnit is the leading testing framework used for testing Java code.
The class under test models a simple bank account, that charges a penalty when you go overdrawn.
public class BankAccount {
private int balance;
public BankAccount(int i){
balance = i;
}
public Bank...
In molecular biology and genetics, GC-content (or guanine-cytosine content, GC% in short) is the percentage of nitrogenous bases on a DNA molecule that are either guanine or cytosine (from a possibility of four different ones, also including adenine and thymine).
Using BioPython:
>>> from...
