JavaScript: Initialize an array containing the numbers in the specified range where start and end are inclusive with their common difference step
JavaScript fundamental (ES6 Syntax): Exercise-54 with Solution
Write a JavaScript program to initialize an array containing the numbers in the specified range where start and end are inclusive with their common difference step.
- Use Array.from() to create an array of the desired length.
- Use (end - start + 1)/step and a map function to fill the array with the desired values in the given range.
- Omit the second argument, start, to use a default value of 0.
- Omit the last argument, step, to use a default value of 1.
Sample Solution:
JavaScript Code:
//#Source https://bit.ly/2neWfJ2
const initialize_Array_With_Range = (end, start = 0, step = 1) =>
Array.from({ length: Math.ceil((end + 1 - start) / step) }).map((v, i) => i * step + start);
console.log(initialize_Array_With_Range(5));
console.log(initialize_Array_With_Range(8, 3));
console.log(initialize_Array_With_Range(6, 0, 2));
Sample Output:
[0,1,2,3,4,5] [3,4,5,6,7,8] [0,2,4,6]
Pictorial Presentation:
Flowchart:

Live Demo:
See the Pen javascript-basic-exercise-1-54 by w3resource (@w3resource) on CodePen.
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JavaScript: Tips of the Day
Chunks an array into n smaller arrays
Example:
const tips_chunkIntoN = (arr, n) => { const size = Math.ceil(arr.length / n); return Array.from({ length: n }, (v, i) => arr.slice(i * size, i * size + size) ); } console.log(tips_chunkIntoN([1, 2, 3, 4, 5, 6, 7,8], 4));
Output:
[[1,2],[3,4],[5,6],[7,8]]
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