Push An Element In A JavaScript Array If It Doesn’t Exist
To push an element in a JavaScript array if it doesn't exist - For primitive values, use the Array.includes() or Array.indexOf() method to check if an element already exists, else…
Convert An Array Of Objects To A Map In JavaScript
To convert an array of objects to a Map in JavaScript - Use the Array.map() method to convert the array of objects to an array of key-value pairs and pass…
Get Index Of An Object By Property In JavaScript Array
To get index of an object by property in JavaScript array - Use the findIndex() method and pass a function that does an equality check on the desired property.Use can…
Filter An Array Of Objects Based On A Property In JavaScript
To filter an array of objects based on a property in JavaScript - Use the Array.filter() method. The Array.filter() method accepts a callback function which is called for each element…
Check If An Array Is Empty In JavaScript
To check if an array is empty in JavaScript, use the length property. If the length is 0, then the array is empty. How To Check If An Array Is…
Convert All Array Elements To Lowercase In JavaScript
To convert all array elements to lowercase in JavaScript - Use the map() function to iterate over the array and call the toLowerCase() method on each element.Use the forEach() function…
Remove The First Element Of An Array In JavaScript
To remove the first element of an array in JavaScript, you can use any of these two methods - Use the Array.shift() method to remove the first element of an…
Get The Last n Elements Of An Array In JavaScript
To get the last n elements of an array in JavaScript, you can use the slice() method passing -n as the only argument to slice(). The slice(-n) method will create…
Get Sum Of Array Of Numbers In JavaScript
To get sum of array of numbers in JavaScript you can use any of these methods - A basic for loop,The reduce() method,The eval() method. Let's look at each of…
Convert Array To A String With Spaces In JavaScript
To convert array to a string with spaces in JavaScript, use the 'join()' method. The 'join()' method is used to join the elements of an array into a string by…