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Consider following array in Javascript:
var array1 = ['S', 'T', 'A', 'C', 'K', 'O', 'V', 'E', 'R', 'F', 'L', 'O', 'W'];
Now I want to replace all the elements at once from index 3 to 9 in following way:
array1 = ['S', 'T', 'A', 'X', 'X', 'X', 'X', 'X', 'X', 'X', 'L', 'O', 'W'];
Is it possible to achieve in javascript ?
Note: I want to perform following operation using array only
847
To replace an element in an array:Use the indexOf() method to get the index of the element you want to replace. Call the Array. splice() method to replace the element at the specific index. The array element will get replaced in place.
Replace Multiple Characters in a String using replaceAll # To replace multiple characters in a string, chain multiple calls to the replaceAll() method, e.g. str. replaceAll('. ', '!
The idea is to use JavaScript filter() method to remove multiple items from an array. The following code example returns the new array of filtered values using the latest includes() method. Here's an alternative version which uses the indexOf() method instead of the includes() method.
Array indexing starts at zero in C; you cannot change that.
Use Array.fill()
var array1 = ['S', 'T', 'A', 'C', 'K', 'O', 'V', 'E', 'R', 'F', 'L', 'O', 'W'];
array1.fill('X', 3, 10)
console.log(array1)Use array splice() method
var array1= ['S', 'T', 'A', 'C', 'K', 'O', 'V', 'E', 'R', 'F', 'L', 'O', 'W'];
// At position 3, delete 7 and add 7 elements:
array1.splice(3, 7, "X","X","X","X","X","X","X");
console.log(array1);One way is with Array.prototype.map:
This loops through every index of the array, and if the index is between 3 and 9 (inclusive), set it to 'X', otherwise keep it as the original chr (character)
var array1 = ['S', 'T', 'A', 'C', 'K', 'O', 'V', 'E', 'R', 'F', 'L', 'O', 'W'];
var array2 = array1.map((chr, idx) => 3 <= idx && idx <= 9 ? 'X' : chr);
console.log(array2);If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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