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			25 lines
		
	
	
		
			600 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
			
		
		
	
	
			25 lines
		
	
	
		
			600 B
		
	
	
	
		
			JavaScript
		
	
	
	
	
	
/**
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 * The base implementation of `_.sum` and `_.sumBy` without support for
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 * iteratee shorthands.
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 *
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 * @private
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 * @param {Array} array The array to iterate over.
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 * @param {Function} iteratee The function invoked per iteration.
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 * @returns {number} Returns the sum.
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 */
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function baseSum(array, iteratee) {
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  var result,
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      index = -1,
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      length = array.length;
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  while (++index < length) {
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    var current = iteratee(array[index]);
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    if (current !== undefined) {
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      result = result === undefined ? current : (result + current);
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    }
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  }
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  return result;
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}
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module.exports = baseSum;
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