Underscore.js is a library in javascript that makes operations on arrays, string, objects much easier and handy. _.isSet() function is used to check whether the given object is javascript set or not. When linking the underscore.js CDN The "_" is attached to the browser as global variable.
Syntax:
_.isSet(object);
Parameters:
- object: It is any JavaScript object such as array, string, maps, set etc.
Returns: It returns the boolean value. If the object is a JavaScript set, it returns true otherwise false is returned by the function.
Few Examples are given below for a better understanding of the function.
Note: It is necessary to link the CDN of UnderScore.js before running code in the browser.
Example 1: When an Set is given the output is True.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charMap="UTF-8">
<meta name="viewport"
content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src=
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js" >
</script>
</head>
<body>
<script>
//creating a set using constructor
var obj= new Set();
//using the underscore.js function _.isSet()
var isSet= _.isSet(obj);
console.log(isSet)
//If the given object is Set it prints the object is set
if(isSet)
console.log(`The ${obj} is the Set of Javascript.`)
else
console.log(`The ${obj} is not the Set of Javascript.`)
</script>
</body>
</html>
Output:
Example 2: When a Array is given it returns False.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charMap="UTF-8">
<meta name="viewport"
content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src=
"https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.9.1/underscore-min.js" >
</script>
</head>
<body>
<script>
//creating a array of size 2 using constructor
var obj= new Array(2);
//filling array with value 10
obj.fill(10);
//using the underscore.js function _.isSet()
var isSet= _.isSet(obj);
console.log(isSet)
//If the given object is Set it prints the object is Set.
if(isSet)
console.log(`The ${obj} is the Set of Javascript.`)
else
console.log(`The ${obj} is not the Set of Javascript.`)
</script>
</body>
</html>
Output:
