Javascript array methods & operations

Here are some of the most important and userd array functions and methods in Javascript.

Here are a list of the most important array methods in javascript.
Here is a samle of an array in Javascript

const names = ['Mohammed', 'Ahmed', 'Hassan', 'Nehad', 25, 'Ahmed'];

• Find the index for a value within an array.
  
  
  
  1. Using IndexOf() & lastIndexOf (Please note these two methods don't work for references, such as array of objects, this won't work with objects)
     

     //ProtoType for this function , This will return the index if value is found or -1 other wise.
     
     // You can check if element is found or not using if(index !== -1)
     
     const index = Array.indexOf('value', startingPosition);
     
     
     
     //To find the first index for Ahmed in this array 
     
     const index = data.indexOf('Ahmed')
     
     
     
     //To find the last index for Ahmed
     
     const index = data.lastIndexOf('Ahmed');?
     
        
         
     
             
     
                  
                               
             
         
        
         
     
             
     
                  
                                                                      js arrays
                                         array functions
                                         arrays
                                         indexof
                                         lastIndexOf
                                         find
                                         for
                                         forEach
                                         includes
                                         check value in array
                                         sort
                                         reverse
                                         array sort
                                         array reverse
                                         array filter
                                         filtering arrays
                                         reduce
                                         array reduce
                                         array sum
                                         array smallest value
                                         array greatest value
                                         array min
                                         array max
                                         split string into array
                                         join
                                         join array into string
                                         isArray
                                         instanceOf
                                               
             
         
     
         
                   
             
     
                 
     Read Also
                 
                 
     
                                         
     Array unique values
                                 
             
     
             
     
         
     
             
     
                             
             
             
     
                 
     Mohammed Anwar
                 
     Experienced technical lead PHP, MySQL and Laravel Developer for 15+ years, with proven ability to develop and create high-quality and optimized web applications. Great ability to build and optimize database design, schema and queries. Versed programing trainer and instructor delivering web courses and helping others to get into the field in a timely manner. Fast and eager learner for new technologies .