Function _fnSortData

external/.datatables.js:5590–5625

(settings, colIdx)

	// Get the data to sort a column, be it from cache, fresh (populating the
	// cache), or from a sort formatter
	function _fnSortData(settings, colIdx) {
		// Custom sorting function - provided by the sort data type
		var column = settings.aoColumns[colIdx]
		var customSort = DataTable.ext.order[column.sSortDataType]
		var customData

		if (customSort) {
			customData = customSort.call(settings.oInstance, settings, colIdx, _fnColumnIndexToVisible(settings, colIdx))
		}

		// Use / populate cache
		var row, cellData
		var formatter = DataTable.ext.type.order[column.sType + "-pre"]
		var data = settings.aoData

		for (var rowIdx = 0; rowIdx < data.length; rowIdx++) {
			// Sparse array
			if (!data[rowIdx]) {
				continue
			}

			row = data[rowIdx]

			if (!row._aSortData) {
				row._aSortData = []
			}

			if (!row._aSortData[colIdx] || customSort) {
				cellData = customSort
					? customData[rowIdx] // If there was a custom sort function, use data from there
					: _fnGetCellData(settings, rowIdx, colIdx, "sort")

				row._aSortData[colIdx] = formatter ? formatter(cellData, settings) : cellData
			}
		}
	}

	/**
	 * State information for a table