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node_modules/underscore/cjs/_createReduce.js
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1lostsun
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05 май 2025, 11:35
05 май 2025, 11:35
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var keys = require('./keys.js'); var _optimizeCb = require('./_optimizeCb.js'); var _isArrayLike = require('./_isArrayLike.js'); // Internal helper to create a reducing function, iterating left or right. function createReduce(dir) { // Wrap code that reassigns argument variables in a separate function than // the one that accesses `arguments.length` to avoid a perf hit. (#1991) var reducer = function(obj, iteratee, memo, initial) { var _keys = !_isArrayLike(obj) && keys(obj), length = (_keys || obj).length, index = dir > 0 ? 0 : length - 1; if (!initial) { memo = obj[_keys ? _keys[index] : index]; index += dir; } for (; index >= 0 && index < length; index += dir) { var currentKey = _keys ? _keys[index] : index; memo = iteratee(memo, obj[currentKey], currentKey, obj); } return memo; }; return function(obj, iteratee, memo, context) { var initial = arguments.length >= 3; return reducer(obj, _optimizeCb(iteratee, context, 4), memo, initial); }; } module.exports = createReduce;