Underscore.js is a library in javascript that makes operations on arrays, string, objects much easier and handy. _.isSymbol() function is used to check whether the given object is javascript Symbol Object or not.
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:
_.isSymbol(object);
Parameters: It takes only one parameter i.e object.
Returns: It returns the boolean value. If the object is a Symbol object of javascript it returns true otherwise false is returned by the function.
Few Examples are given below for better understanding of the function.
Example 1: When symbol is created with some value.
HTML
<!DOCTYPE html> <html> <head> <script src = </script> </head> <body> <script> //creating new symbol from symbol object let e=Symbol("some symbol") let ans=_.isSymbol(e) console.log("symbol is :", e) console.log(_.isSymbol(e)) if(ans) console.log("It is the javascript Symbol Object") else console.log("It is the not javascript Symbol Object") </script> </body> </html> |
Output:
Example 2: When a symbol is created with no given object
HTML
<!DOCTYPE html> <html> <head> <script src = </script> </head> <body> <script> //creating new symbol from symbol object let e=Symbol() let ans=_.isSymbol(e) //printing the symbol console.log("symbol is :", e.valueOf(e)) //printing true if this is the symbol else false console.log(_.isSymbol(e)) if(ans) console.log("It is the javascript Symbol Object") else console.log("It is the not javascript Symbol Object") </script> </body> </html> |
Output:
Example 3: When a given object is the string.
HTML
<!DOCTYPE html> <html> <head> <script src = </script> </head> <body> <script> //creating new string let e="neveropen" let ans=_.isSymbol(e) //printing the symbol console.log("symbol is :", e.valueOf(e)) //printing true if this is the symbol else false console.log(_.isSymbol(e)) if(ans) console.log("It is the javascript Symbol Object") else console.log("It is the not javascript Symbol Object") </script> </body> </html> |
Output:
