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30 lines
864 B
30 lines
864 B
var baseRange = require('./_baseRange'), |
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isIterateeCall = require('./_isIterateeCall'), |
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toFinite = require('./toFinite'); |
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/** |
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* Creates a `_.range` or `_.rangeRight` function. |
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* |
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* @private |
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* @param {boolean} [fromRight] Specify iterating from right to left. |
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* @returns {Function} Returns the new range function. |
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*/ |
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function createRange(fromRight) { |
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return function(start, end, step) { |
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if (step && typeof step != 'number' && isIterateeCall(start, end, step)) { |
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end = step = undefined; |
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} |
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// Ensure the sign of `-0` is preserved. |
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start = toFinite(start); |
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if (end === undefined) { |
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end = start; |
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start = 0; |
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} else { |
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end = toFinite(end); |
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} |
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step = step === undefined ? (start < end ? 1 : -1) : toFinite(step); |
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return baseRange(start, end, step, fromRight); |
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}; |
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} |
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module.exports = createRange;
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