j-gallery/example/node_modules/source-list-map/lib/helpers.js

a picture layout library

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/
exports.getNumberOfLines = function getNumberOfLines(str) {
	var nr = -1;
	var idx = -1;
	do {
		nr++
		idx = str.indexOf("\n", idx + 1);
	} while(idx >= 0);
	return nr;
};