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25 lines
697 B
TypeScript
25 lines
697 B
TypeScript
/**
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* The base implementation of `range` and `rangeRight` which doesn't
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* coerce arguments.
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*
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* @private
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* @param {number} start The start of the range.
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* @param {number} end The end of the range.
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* @param {number} step The value to increment or decrement by.
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* @param {boolean} [fromRight] Specify iterating from right to left.
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* @returns {Array} Returns the range of numbers.
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*/
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function baseRange(start, end, step, fromRight) {
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let index = -1
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let length = Math.max(Math.ceil((end - start) / (step || 1)), 0)
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const result = new Array(length)
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while (length--) {
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result[fromRight ? length : ++index] = start
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start += step
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}
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return result
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}
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export default baseRange
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