Implement a function to generate a range of numbers | Range I | JavaScript Interview Question | Lodash Polyfills

In this question, the candidate needs to implement a function called range that creates an array of numbers (positive and/or negative) progressing from start up to, but not including, end.

• A step of -1 is used if a negative start is specified without an end or step.
• If end is not specified, it's set to start with start then set to 0.

This method is similar to the _.range method provided by the popular library lodash.

Syntax

range(start, end, step);

Arguments

• [start=0] (number): The start of the range. Optional argument.
• end (number): The end of the range.
• [step=1] (number): The value to increment or decrement by. Optional argument.

Returns

• (Array): Returns the range of numbers.

Examples

range(4);
// => [0, 1, 2, 3]
 
range(-4);
// => [0, -1, -2, -3]
 
range(1, 5);
// => [1, 2, 3, 4]
 
range(0, 20, 5);
// => [0, 5, 10, 15]
 
range(0, -4, -1);
// => [0, -1, -2, -3]
 
range(1, 4, 0);
// => [1, 1, 1]
 
range(0);
// => []

Submission

Start the timer, complete your solution, test your solution against the test cases provided by the platform, and submit it. Ideally, you should finish this question within 30 mins.

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