offshore
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An ORM for Node.js
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<a href="../../../index.html">all files</a> / <a href="index.html">lib/offshore/utils/</a> sorter.js
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<span class="cline-any cline-neutral"> </span></td><td class="text"><pre class="prettyprint lang-js">/**
* Module Dependencies
*/
var _ = require('lodash');
/**
* Sort `data` (tuples) using `sortCriteria` (comparator)
*
* Based on method described here:
* http://stackoverflow.com/a/4760279/909625
*
* @param { Object[] } data [tuples]
* @param { Object } sortCriteria [mongo-style comparator object]
* @return { Object[] }
*/
module.exports = function sortData(data, sortCriteria) {
function dynamicSort(property) {
var sortOrder = 1;
if (property[0] === '-') {
sortOrder = -1;
property = property.substr(1);
}
return function(a, b) {
var result = (a[property] < b[property]) ? -1 : (a[property] > b[property]) ? 1 : 0;
return result * sortOrder;
};
}
function dynamicSortMultiple() {
var props = arguments;
return function(obj1, obj2) {
var i = 0;
var result = 0;
var numberOfProperties = props.length;
while (result === 0 && i < numberOfProperties) {
result = dynamicSort(props[i])(obj1, obj2);
i++;
}
return result;
};
}
// build sort criteria in the format ['firstName', '-lastName']
var sortArray = [];
_.each(_.keys(sortCriteria), function(key) {
if (sortCriteria[key] === -1) sortArray.push('-' + key);
else sortArray.push(key);
});
data.sort(dynamicSortMultiple.apply(null, sortArray));
return data;
};
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