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38 lines
1.1 KiB
38 lines
1.1 KiB
var baseToNumber = require('./_baseToNumber'), |
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baseToString = require('./_baseToString'); |
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/** |
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* Creates a function that performs a mathematical operation on two values. |
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* |
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* @private |
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* @param {Function} operator The function to perform the operation. |
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* @param {number} [defaultValue] The value used for `undefined` arguments. |
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* @returns {Function} Returns the new mathematical operation function. |
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*/ |
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function createMathOperation(operator, defaultValue) { |
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return function(value, other) { |
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var result; |
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if (value === undefined && other === undefined) { |
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return defaultValue; |
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} |
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if (value !== undefined) { |
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result = value; |
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} |
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if (other !== undefined) { |
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if (result === undefined) { |
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return other; |
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} |
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if (typeof value == 'string' || typeof other == 'string') { |
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value = baseToString(value); |
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other = baseToString(other); |
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} else { |
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value = baseToNumber(value); |
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other = baseToNumber(other); |
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} |
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result = operator(value, other); |
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} |
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return result; |
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}; |
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} |
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module.exports = createMathOperation;
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