Underscore.js _.value() Function

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= 
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js"> 
    </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= 
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js"> 
    </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:

My Personal Notes

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