4.0
Since Bash 4.0, another operator ;;& was introduced which also provides fall through only if the patterns in subsequent case statement(s), if any, match.
#!/bin/bash
var=abc
case $var in
a*)
echo "Antartica"
;;&
xyz)
echo "Brazil"
;;&
*b*)
...
The original C standard had no intrinsic Boolean type, so bool, true and false had no inherent meaning and were often defined by programmers. Typically true would be defined as 1 and false would be defined as 0.
C99
C99 adds the built-in type _Bool and the header <stdbool.h> which defines bo...
Prior to Java 5's concurrent package introduction threading was more low level.The introduction of this package provided several higher level concurrent programming aids/constructs.
Locks are thread synchronisation mechanisms that essentially serve the same purpose as synchronized blocks or key wor...
We use the null function to check if a given Map is empty:
> Map.null $ Map.fromList [("Alex", 31), ("Bob", 22)]
False
> Map.null $ Map.empty
True
The Repeat command, executed with the dot or period key (.), is more useful than it first appears. Once learned, you will find yourself using it often.
Command:Description.Repeat the last change10.Repeat the last change 10 times
So then, for a very simple example, if you make a change to line 1 by...
Using Alternatives
Many Linux distributions use the alternatives command for switching between different versions of a command. You can use this for switching between different versions of Java installed on a machine.
In a command shell, set $JDK to the pathname of a newly installed JDK; e.g....
Given a DataFrame with MultiIndex columns
# build an example DataFrame
midx = pd.MultiIndex(levels=[['zero', 'one'], ['x','y']], labels=[[1,1,0,],[1,0,1,]])
df = pd.DataFrame(np.random.randn(2,3), columns=midx)
In [2]: df
Out[2]:
one zero
y x ...
Start with a standard DataFrame
df = pd.DataFrame(np.random.randn(2,3), columns=['a','b','c'])
In [91]: df
Out[91]:
a b c
0 -0.911752 -1.405419 -0.978419
1 0.603888 -1.187064 -0.035883
Now to change to MultiIndex, create a MultiIndex object and assign it to df....
You can use the archivesBaseName to set the name of apk.
For example:
defaultConfig {
....
project.ext.set("archivesBaseName", "MyName-" + defaultConfig.versionName);
}
You will obtain this output.
MyName-X.X.X-release.apk
-- File counter.vhd
-- The entity is the interface part. It has a name and a set of input / output
-- ports. Ports have a name, a direction and a type. The bit type has only two
-- values: '0' and '1'. It is one of the standard types.
entity counter is
port(
clock: in bit; -- We ...
To check if a key exists in a Map, use the .has() method:
map.has(key);
Example:
const map = new Map([[1, 2], [3, 4]]);
console.log(map.has(1)); // true
console.log(map.has(2)); // false
One of the most common operations in erlang is pattern matching. It is used when assigning a value to a variable, in function declarations and in control-flow structures like case and receive statements. A pattern matching operation needs at least 2 parts: a pattern, and a term against wich the patt...
$params = @{
Uri = "https://your.hipchat.com/v2/room/934419/notification?auth_token=???"
Method = "POST"
Body = @{
color = 'yellow'
message = "This is a test message!"
notify = $false
message_format = "text"
...
#include <iostream>
#include <string>
int main()
{
const char * C_String = "This is a line of text w";
const char * C_Problem_String = "This is a line of text ኚ";
std::string Std_String("This is a second line of text w");
std::string...
To check if an element with a specified key exits in a WeakMap, use the .has() method. It returns true if it exits, and otherwise false.
const obj1 = {},
obj2 = {};
const weakmap = new WeakMap([[obj1, 7]]);
console.log(weakmap.has(obj1)); // true
console.log(weakmap.has(obj2)); // false...
In order to compile docker its recommended you have at least 2 GB RAM. Even with that it fails sometimes so its better to go for 4GB instead.
make sure git and make is installed
sudo apt-get install make git-core -y
install a new kernel (at least 4.2)
sudo apt-get install linux-generic...
# create docker container
export cid=$(docker run -d --security-opt seccomp:unconfined busybox /bin/sh -c 'i=0; while true; do echo $i; i=$(expr $i + 1); sleep 1; done')
# container is started and prints a number every second
# display the output with
docker logs $cid
# checkpoint the cont...
