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lib
state.js
// API module.exports = state; /** * Creates initial state object * for iteration over list * * @param {array|object} list - list to iterate over * @param {function|null} sortMethod - function to use for keys sort, * or `null` to keep them as is * @returns {object} - initial state object */ function state(list, sortMethod) { var isNamedList = !Array.isArray(list) , initState = { index : 0, keyedList: isNamedList || sortMethod ? Object.keys(list) : null, jobs : {}, results : isNamedList ? {} : [], size : isNamedList ? Object.keys(list).length : list.length } ; if (sortMethod) { // sort array keys based on it's values // sort object's keys just on own merit initState.keyedList.sort(isNamedList ? sortMethod : function(a, b) { return sortMethod(list[a], list[b]); }); } return initState; }
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