Underscore.js _.isSet() Function
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.
html
<!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.
html
<!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:
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