Underscore.js _.chain() Function
Underscore.js is a JavaScript library that provides a lot of useful functions that help in the programming in a big way like the map, filter, invoke, etc even without using any built-in objects.
The _.chain() function is an inbuilt function in Underscore.js library of JavaScript which is used to find a wrapped object. Moreover, invoking the methods on this object will continue to return the wrapped objects until the value is invoked.
Syntax:
_.chain(obj)
Parameters: It accepts a single parameter which is specified below:
- obj: It is the stated object.
Return Value: This method returns a wrapped object.
Example 1:
<!DOCTYPE html> <html> <head> <script src= </script> </head> <body> <script> console.log(_.chain([99, 3, 4, 6]).push(100)); </script> </body> </html> |
Output:
[99, 3, 4, 6, 100]
Example 2:
<!DOCTYPE html> <html> <head> <script src= </script> </head> <body> <script> var author_article = [ { author: 'Nidhi1352', articles: 792 }, { author: 'Nisha95', articles: 590 }, { author: 'Rohit01', articles: 450 } ]; var experienced = _.chain(author_article) .sortBy(function (author_article) { return author_article.article; }) .map(function (author_article) { return author_article.author + ' wrote ' + author_article.articles + ' articles! '; }) .first() .value(); console.log(experienced); </script> </body> </html> |
Output:
Nidhi1352 wrote 792 articles!
Reference: https://underscorejs.org/#chain
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