Underscore.js is a JavaScript library that makes operations on arrays, string, objects much easier and handy.
The _.value() function is used to extract the value of the wrapped object. This function is mainly used with chain function in JavaScript.
Note: It is very necessary to link the underscore CDN before going and using underscore functions in the browser. When linking the underscore.js CDN The “_” is attached to the browser as global variable.
Syntax:
_.chain(obj).value()
Parameters: This function does not accept any parameter. It is chained with different functions. “.value()” is used to extract the value of the object i.e. array, string etc.Return Value: It returns the value of the object of object type. If the object is an array it returns an array, If the object is a string it returns a string and so on.
Example 1:
<!DOCTYPE html> <html> <head> <script src= </script> </head> <body> <script> let arr = ["c", "d", "a", "b"]; console.log(`original array is ${arr}`); // Wrapped object is array so // its values is returned let newArr = _.chain(arr).sort().value(); // Changes made in original array. console.log(`original array is ${arr}`); console.log(`new array is ${newArr}`); </script> </body> </html> |
Output:
Example 2:
<!DOCTYPE html> <html> <head> <script src= </script> </head> <body> <script> let str = "geeks for geeks" console.log(`original string is ${str}`); // Wrapped object is str so its // values is returned let newstr = _.chain(str).toArray() .reverse().join("").value(); // Printing the new string console.log(`new string is ${newstr}`); </script> </body> </html> |
Output:
