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luhn-generator

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A generator of numbers that passes the validation of Luhn algorithm or Luhn formula, also known as the 'modulus 10' or 'mod 10' algorithm

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'use strict'; var isWindows = process.platform === 'win32'; // Regex to split a windows path into three parts: [*, device, slash, // tail] windows-only var splitDeviceRe = /^([a-zA-Z]:|[\\\/]{2}[^\\\/]+[\\\/]+[^\\\/]+)?([\\\/])?([\s\S]*?)$/; // Regex to split the tail part of the above into [*, dir, basename, ext] var splitTailRe = /^([\s\S]*?)((?:\.{1,2}|[^\\\/]+?|)(\.[^.\/\\]*|))(?:[\\\/]*)$/; var win32 = {}; // Function to split a filename into [root, dir, basename, ext] function win32SplitPath(filename) { // Separate device+slash from tail var result = splitDeviceRe.exec(filename), device = (result[1] || '') + (result[2] || ''), tail = result[3] || ''; // Split the tail into dir, basename and extension var result2 = splitTailRe.exec(tail), dir = result2[1], basename = result2[2], ext = result2[3]; return [device, dir, basename, ext]; } win32.parse = function(pathString) { if (typeof pathString !== 'string') { throw new TypeError( "Parameter 'pathString' must be a string, not " + typeof pathString ); } var allParts = win32SplitPath(pathString); if (!allParts || allParts.length !== 4) { throw new TypeError("Invalid path '" + pathString + "'"); } return { root: allParts[0], dir: allParts[0] + allParts[1].slice(0, -1), base: allParts[2], ext: allParts[3], name: allParts[2].slice(0, allParts[2].length - allParts[3].length) }; }; // Split a filename into [root, dir, basename, ext], unix version // 'root' is just a slash, or nothing. var splitPathRe = /^(\/?|)([\s\S]*?)((?:\.{1,2}|[^\/]+?|)(\.[^.\/]*|))(?:[\/]*)$/; var posix = {}; function posixSplitPath(filename) { return splitPathRe.exec(filename).slice(1); } posix.parse = function(pathString) { if (typeof pathString !== 'string') { throw new TypeError( "Parameter 'pathString' must be a string, not " + typeof pathString ); } var allParts = posixSplitPath(pathString); if (!allParts || allParts.length !== 4) { throw new TypeError("Invalid path '" + pathString + "'"); } allParts[1] = allParts[1] || ''; allParts[2] = allParts[2] || ''; allParts[3] = allParts[3] || ''; return { root: allParts[0], dir: allParts[0] + allParts[1].slice(0, -1), base: allParts[2], ext: allParts[3], name: allParts[2].slice(0, allParts[2].length - allParts[3].length) }; }; if (isWindows) module.exports = win32.parse; else /* posix */ module.exports = posix.parse; module.exports.posix = posix.parse; module.exports.win32 = win32.parse;