diff --git a/snippets/initializeArrayWithRange.md b/snippets/initializeArrayWithRange.md index 22b126ad8..7c803aed0 100644 --- a/snippets/initializeArrayWithRange.md +++ b/snippets/initializeArrayWithRange.md @@ -1,16 +1,18 @@ ### initializeArrayWithRange -Initializes an array containing the numbers in the specified range where `start` and `end` are inclusive. +Initializes an array containing the numbers in the specified range where `start` and `end` are inclusive with there common difference `step`. -Use `Array((end + 1) - start)` to create an array of the desired length, `Array.map()` to fill with the desired values in a range. +Use `Array(Math.ceil((end+1-start)/step)` to create an array of the desired length(the amounts of elements is equal to `(end-start)/step` or `(end+1-start)/step` for inclusive end), `Array.map()` to fill with the desired values in a range. You can omit `start` to use a default value of `0`. - +You can omit `step` to use a default value of `1`. + ```js -const initializeArrayWithRange = (end, start = 0) => - Array.from({ length: end + 1 - start }).map((v, i) => i + start); +const initializeArrayWithRange = (end, start = 0,step = 1) => + Array.from({length:Math.ceil((end + 1 - start)/step)}).map((v, i) => (i * step) + start); ``` ```js initializeArrayWithRange(5); // [0,1,2,3,4,5] initializeArrayWithRange(7, 3); // [3,4,5,6,7] +initializeArrayWithRange(9,0,2); //[0,2,4,6,8] ```