Spread Source

Spread Source

Home
Documentation
Development
Credits
License
Download
Mailing List
Support

The Spread toolkit provides a high performance messaging service that is resilient to faults across local and wide area networks. Spread functions as a unified message bus for distributed applications, and provides highly tuned application-level multicast, group communication, and point to point support. Spread services range from reliable messaging to fully ordered messages with virtual synchrony delivery guarantees.

Copyright © 2016 Spread Concepts LLC. All rights reserved.

Spread is an open source toolkit that can be used in many distributed applications that require high reliability, high performance, and robust communication among various subsets of members. The toolkit is designed to encapsulate the challenging aspects of asynchronous networks and enable the construction of reliable and scalable distributed applications.
Spread consists of a library that user applications are linked with, a binary daemon which runs on each computer that is part of the processor group, and various utility and demonstration programs.

May 16, 2018 - This patch release fixes a bug in the membership algorithm that could be triggered by unusual delays.
Spread 5 is an important release that adds support for IPv6.
Spread version 5 adds support for IPv6 in the Spread daemon, C
language client library and several example and support programs
(e.g. - spmonitor, spuser, spsend, sprecv, spflooder). This version
of Spread supports Posix environments (e.g. - Linux) and Windows.

myFunction ( a , ... iterableObj , b )
[ 1 , ... iterableObj , '4' , 'five' , 6 ]
{ ... obj , key : 'value' }

const obj = { key1 : 'value1' } ;
const array = [ ... obj ] ; // TypeError: obj is not iterable

const array = [ 1 , 2 , 3 ] ;
const obj = { ... array } ; // { 0: 1, 1: 2, 2: 3 }

function myFunction ( x , y , z ) { }
const args = [ 0 , 1 , 2 ] ;
myFunction . apply ( null , args ) ;

function myFunction ( x , y , z ) { }
const args = [ 0 , 1 , 2 ] ;
myFunction ( ... args ) ;

function myFunction ( v , w , x , y , z ) { }
const args = [ 0 , 1 ] ;
myFunction ( - 1 , ... args , 2 , ... [ 3 ] ) ;

const dateFields = [ 1970 , 0 , 1 ] ; // 1 Jan 1970
const d = new Date ( ... dateFields ) ;

const parts = [ 'shoulders' , 'knees' ] ;
const lyrics = [ 'head' , ... parts , 'and' , 'toes' ] ;
// ["head", "shoulders", "knees", "and", "toes"]

const arr = [ 1 , 2 , 3 ] ;
const arr2 = [ ... arr ] ; // like arr.slice()

arr2 . push ( 4 ) ;
// arr2 becomes [1, 2, 3, 4]
// arr remains unaffected

const a = [ [ 1 ] , [ 2 ] , [ 3 ] ] ;
const b = [ ... a ] ;

b . shift ( ) . shift ( ) ;
// 1

// Oh no! Now array 'a' is affected as well:
a
// [[], [2], [3]]

let arr1 = [ 0 , 1 , 2 ] ;
const arr2 = [ 3 , 4 , 5 ] ;

// Append all items from arr2 onto arr1
arr1 = arr1 . concat ( arr2 ) ;

let arr1 = [ 0 , 1 , 2 ] ;
const arr2 = [ 3 , 4 , 5 ] ;

arr1 = [ ... arr1 , ... arr2 ] ;
// arr1 is now [0, 1, 2, 3, 4, 5]

const arr1 = [ 0 , 1 , 2 ] ;
const arr2 = [ 3 , 4 , 5 ] ;

// Prepend all items from arr2 onto arr1
Array . prototype . unshift . apply ( arr1 , arr2 ) ;

// arr1 is now [3, 4, 5, 0, 1, 2]

let arr1 = [ 0 , 1 , 2 ] ;
const arr2 = [ 3 , 4 , 5 ] ;

arr1 = [ ... arr2 , ... arr1 ] ;
// arr1 is now [3, 4, 5, 0, 1, 2]

const obj1 = { foo : 'bar' , x : 42 } ;
const obj2 = { foo : 'baz' , y : 13 } ;

const clonedObj = { ... obj1 } ;
// Object { foo: "bar", x: 42 }

const mergedObj = { ... obj1 , ... obj2 } ;
// Object { foo: "baz", x: 42, y: 13 }

const obj1 = { foo : 'bar' , x : 42 } ;
Object . assign ( obj1 , { x : 1337 } ) ;
console . log ( obj1 ) ; // Object { foo: "bar", x: 1337 }

const objectAssign = Object . assign ( { set foo ( val ) { console . log ( val ) ; } } , { foo : 1 } ) ;
// Logs "1"; objectAssign.foo is still the original setter

const spread = { set foo ( val ) { console . log ( val ) ; } , ... { foo : 1 } } ;
// Nothing is logged; spread.foo is 1

const obj1 = { foo : 'bar' , x : 42 } ;
const obj2 = { foo : 'baz' , y : 13 } ;
const merge = ( ... objects ) => ( { ... objects } ) ;

const mergedObj1 = merge ( obj1 , obj2 ) ;
// Object { 0: { foo: 'bar', x: 42 }, 1: { foo: 'baz', y: 13 } }

const mergedObj2 = merge ( { } , obj1 , obj2 ) ;
// Object { 0: {}, 1: { foo: 'bar', x: 42 }, 2: { foo: 'baz', y: 13 } }

const obj1 = { foo : 'bar' , x : 42 } ;
const obj2 = { foo : 'baz' , y : 13 } ;
const merge = ( ... objects ) => objects . reduce ( ( acc , cur ) => ( { ... acc , ... cur } ) ) ;

const mergedObj1 = merge ( obj1 , obj2 ) ;
// Object { foo: 'baz', x: 42, y: 13 }

Web technology reference for developers
Code used to describe document style
Protocol for transmitting web resources
Interfaces for building web applications
Developing extensions for web browsers
Web technology reference for developers
Learn to structure web content with HTML
Learn to run scripts in the browser
Learn to make the web accessible to all
Frequently asked questions about MDN Plus
Spread syntax ( ... ) allows an iterable, such as an array or string, to be expanded in places where zero or more arguments (for function calls) or elements (for array literals) are expected. In an object literal, the spread syntax enumerates the properties of an object and adds the key-value pairs to the object being created.
Spread syntax looks exactly like rest syntax. In a way, spread syntax is the opposite of rest syntax. Spread syntax "expands" an array into its elements, while rest syntax collects multiple elements and "condenses" them into a single element. See rest parameters and rest property .
Spread syntax can be used when all elements from an object or array need to be included in a new array or object, or should be applied one-by-one in a function call's arguments list. There are three distinct places that accept the spread syntax:
Although the syntax looks the same, they come with slightly different semantics.
Only iterable objects, like Array , can be spread in array and function parameters. Many objects are not iterable, including all plain objects that lack a Symbol.iterator method:
On the other hand, spreading in object literals enumerates the own properties of the object. For typical arrays, all indices are enumerable own properties, so arrays can be spread into objects.
When using spread syntax for function calls, be aware of the possibility of exceeding the JavaScript engine's argument length limit. See Function.prototype.apply() for more details.

It is common to use Function.prototype.apply() in cases where you want to
use the elements of an array as arguments to a function.

With spread syntax the above can be written as:

Any argument in the argument list can use spread syntax, and the spread syntax can be
used multiple times.

When calling a constructor with new , it's not possible to directly use an array and apply() , because apply() calls the target function instead of constructing it, which means, among other things, that new.target will be undefined . However, an array can be easily used with new thanks to spread syntax:

Without spread syntax, to create a new array using an existing array as one part of it,
the array literal syntax is no longer sufficient and imperative code must be used
instead using a combination of push() ,
splice() , concat() , etc. With spread syntax this becomes much more succinct:

Just like spread for argument lists, ... can be used anywhere in the array
literal, and may be used more than once.

Note: Spread syntax effectively goes one level deep while copying an array. Therefore, it may be unsuitable for copying multidimensional arrays. The same is true with Object.assign() — no native operation in JavaScript does a deep clone.

Array.prototype.concat() is often used to concatenate an array to the end
of an existing array. Without spread syntax, this is done as:

Array.prototype.unshift() is often used to insert an array of values at
the start of an existing array. Without spread syntax, this is done as:

Note: Unlike unshift() , this creates a new arr1 , instead of modifying the original arr1 array in-place.
Shallow-cloning (excluding prototype) or merging of objects is possible using a shorter syntax than Object.assign() .
Note that Object.assign() can be used to mutate an object, whereas spread syntax can't.
In addition, Object.assign() triggers setters on the target object, whereas spread syntax does not.
You cannot naively re-implement the Object.assign() function through a single spreading:
In the above example, the spread syntax does not work as one might expect: it spreads an array of arguments into the object literal, due to the rest parameter. Here is an implementation of merge using the spread syntax, whose behavior is similar to Object.assign() , except that it doesn't trigger setters, nor mutates any object:
BCD tables only load in the browser
Last modified: Aug 16, 2022 , by MDN contributors
Your blueprint for a better internet.
Visit Mozilla Corporation’s not-for-profit parent, the Mozilla Foundation . Portions of this content are ©1998– 2022 by individual mozilla.org contributors. Content available under a Creative Commons license .

(opens in new tab)

(opens in new tab)

(opens in new tab)

(opens in new tab)

A real open source alternative to Microsoft Office
Operating system: Windows, macOS, Linux
An open source media player than can play virtually anything
Operating system: Windows, macOS, Linux, Android, iOS
A powerful open source photo and image editing tool
Operating system: Windows, macOS, Linux
A slick open source program for advanced video editing
For a private open source browsing experience
Operating system: Windows, macOS, Linux, Android, iOS
A powerful audio editor, ideal for music and podcasts
Operating system: Windows, macOS, Linux
A handy password generator and credential storage tool
Operating systems: Windows (unofficial ports available for others)
An excellent option for open source email management
Operating system: Windows, macOS, Linux
An open source FTP client that's refreshingly user-friendly
Operating system: Windows, macOS, Linux

Are you a pro? Subscribe to our newsletter

Contact me with news and offers from other Future brands

Receive email from us on behalf of our trusted partners or sponsors

The best tech tutorials and in-depth reviews
More stories to check out before you go
TechRadar is supported by its audience. When you purchase through links on our site, we may earn an affiliate commission. Here’s why you can trust us .
The best open source software makes it simple and easy to do everyday tasks on Windows, Mac, and Linux, without the need for license fees.
Open source software is any kind of program where the developer behind it chooses to release the source code for free. Whenever software has an open source license, it means anyone in the world can download, modify and distribute it without paying fees to its original creator.
Since the open source movement took off as a software development philosophy at the end of the 1990s, it’s changed the world. Estimates even suggest that a mind-blowing 96% of all web servers globally are running on some form of open source Linux operating system, for example.
It’s important to remember that open source doesn’t just mean “free”. Lots of companies release their software for free but maintain full copyright ownership of their code, so other developers aren’t able to modify it. By contrast, successful open source initiatives are built on the hard work of potentially thousands of collaborators who have voluntarily given up their time to create something awesome.
Such an accessible development system has some serious advantages. Open source software is often more secure because people from around the world scrutinize new releases and bugs get reported and addressed fast. Also, people are motivated to add cool new features to open source platforms which means open source software is often just as good, if not better, than competing pay-to-use programs.
While open source software is used in everything from networks to web servers, here we'll focus on the best open source software for you to download and run on your desktop or laptop .
We've also featured the best laptop for programming .
With support for documents, spreadsheets, databases, presentations, diagrams, and mathematical formulae, LibreOffice is essentially a free version of the world’s most popular office productivity suite, Microsoft 365 (opens in new tab) .
Some would actually argue that LibreOffice is the more fully-featured of the two, thanks to its dedicated developer community which is adding new tools and tricks all the time. For example, in the latest update, LibreOffice added a QR code generator tool so you can quickly create mobile-friendly links.
An alternative well-known open source office tool is Open Office, which offers many similar features to LibreOffice. The reason that LibreOffice has taken the top spot today is that it is much better at preserving Microsoft file formats. In other words, your formatting won’t get screwed up if you need to modify a document originally written in Microsoft Word.
The only downside to this awesome free office software (opens in new tab) is that editing documents collaboratively online is a bit tricky. Recently, an online editing option has been added but it still requires some technical know-how to implement.
VLC (or VideoLAN Client) media player is a lightweight application created by an open source development group known as the VideoLAN project. This video and media player has been leading the industry for years in terms of popularity, and it’s not hard to see why. You can use VLC media player to open audio and video files in just about any format without having to hunt down extra codecs.
VLC also works for streaming media such as podcasts and online radio stations. But perhaps the greatest VLC media player feature is playback control. You can change almost everything about how your media is displayed from hardware optimization to adding subtitle files from third-party sources.
Like some of the other amazing open source offerings mentioned here, VLC is constantly being upgraded with new goodies and features to explore. The latest updates to the free video player (opens in new tab) have included the ability to stream to other devices (like Chromecasts) and 360-degree video support for VR headsets (opens in new tab) .
Beloved by Linux users since its original release in 1996, GIMP is one of the most famous and best-maintained open source software tools out there. This software is about as close to image editing power and flexibility of the Adobe Photoshop platform as you’re likely to get for free.
GIMP has built-in support for layers, filters, and automatic photo enhancement. It also makes it easy to create new graphic design elements and you can really take things to the next level by downloading plug-ins created by the broader GIMP open source community.
Just like Photoshop, GIMP has a fairly steep learning curve but anyone who puts in a bit of time is sure to appreciate its customizable interface and GPU hardware acceleration. However, if you’re looking for a simple free photo editor (opens in new tab) , check out Paint.NET (opens in new tab) instead. It’s not as powerful, but easier to get to grips with.
Shotcut is open source free video editing software (opens in new tab) . It’s one of those open source programs that really demonstrates how much a dedicated development community can improve a platform given time. In earlier versions, the Shotcut interface was a little bare, but later releases have added extra dockable panels, an intuitive timeline, and other touches that put Shotcut in the same league as premium video editors like Adobe Premiere Pro (opens in new tab) .
This video tool supports non-destructive audio and video editing, meaning you can compile effects without any quality loss. You can also use this platform to do color keying and grading operations, as well as more basic clip splicing and trimming.
Perhaps the coolest thing about Shotcut is its ability to work with more or less any format of video, audio, or photo media. That’s largely thanks to FFmpeg, an open source video framework that sits under the hood of the Shotcut program.
Built on top of Google’s open source Chromium project, Brave is a web browser (opens in new tab) that’s designed to keep your browsing activity private by automatically disabling website trackers and blocking pesky ads. For even more secure browsing, it has a built-in Tor function.
The big advantage of using Brave is that you can access many of the Google Chrome store’s thousands of extensions but enjoy a faster browsing experience than you’d get with a normal Chrome browser. That’s because Brave is less of a resource hog than Google’s regular Chrome package, giving it a performance boost when loading pages.
Another interesting thing about the Brave browser is something called Brave Rewards. The idea behind this feature is that you can opt in to see certain ads and receive a small Basic Attention Token crypto coin in return. Eventually, the developers behind Brave hope this will change the way advertising works on the internet.
Even two decades after its original launch date, Audacity remains one of the most widely-used open source applications. It’s a free audio editor (opens in new tab) that works on Windows, Mac, and Linux systems.
After installing this nifty little package, you’ll find everything you need to record, edit, and enhance sound files. What’s more, thanks to the enormous developer community supporting the program, you can use Audacity’s library of third-party extensions to add any features that aren’t included by default. These will allow you to do everything from adding sound effects to auto-tuning your tracks.
The Audacity interface might look a little complex at first, but given the professional-grade tools available through the program, it’s easy to see why this is the go-to application for musicians and podcast creators.
There are plenty of great password manager (opens in new tab) s out there, but KeePass Password Safe stands out from the crowd thanks to its simple set up and comprehensive feature set. It uses industry-standard (and near unbreakable) AES encryption and two-factor authentication to keep the details of your accounts safe and secure.
KeePass also deserves a mention on this run-down of the best open source platforms due to its portability. Although this open source program can be installed on Windows, Mac, Linux, and mobile devices, you can also store your database and the program on a USB stick for safekeeping.
As if that wasn’t enough, an extensive sel
Girls Pee In Panties Porn
Outdoor Projects
Outdoor Meter

Spread Source

Report Page