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236 lines
7.0 KiB
236 lines
7.0 KiB
module.exports = function (args, opts) { |
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if (!opts) opts = {}; |
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var flags = { bools : {}, strings : {}, unknownFn: null }; |
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if (typeof opts['unknown'] === 'function') { |
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flags.unknownFn = opts['unknown']; |
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} |
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if (typeof opts['boolean'] === 'boolean' && opts['boolean']) { |
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flags.allBools = true; |
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} else { |
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[].concat(opts['boolean']).filter(Boolean).forEach(function (key) { |
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flags.bools[key] = true; |
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}); |
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} |
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var aliases = {}; |
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Object.keys(opts.alias || {}).forEach(function (key) { |
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aliases[key] = [].concat(opts.alias[key]); |
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aliases[key].forEach(function (x) { |
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aliases[x] = [key].concat(aliases[key].filter(function (y) { |
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return x !== y; |
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})); |
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}); |
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}); |
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[].concat(opts.string).filter(Boolean).forEach(function (key) { |
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flags.strings[key] = true; |
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if (aliases[key]) { |
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flags.strings[aliases[key]] = true; |
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} |
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}); |
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var defaults = opts['default'] || {}; |
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var argv = { _ : [] }; |
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Object.keys(flags.bools).forEach(function (key) { |
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setArg(key, defaults[key] === undefined ? false : defaults[key]); |
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}); |
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var notFlags = []; |
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if (args.indexOf('--') !== -1) { |
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notFlags = args.slice(args.indexOf('--')+1); |
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args = args.slice(0, args.indexOf('--')); |
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} |
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function argDefined(key, arg) { |
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return (flags.allBools && /^--[^=]+$/.test(arg)) || |
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flags.strings[key] || flags.bools[key] || aliases[key]; |
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} |
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function setArg (key, val, arg) { |
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if (arg && flags.unknownFn && !argDefined(key, arg)) { |
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if (flags.unknownFn(arg) === false) return; |
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} |
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var value = !flags.strings[key] && isNumber(val) |
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? Number(val) : val |
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; |
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setKey(argv, key.split('.'), value); |
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(aliases[key] || []).forEach(function (x) { |
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setKey(argv, x.split('.'), value); |
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}); |
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} |
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function setKey (obj, keys, value) { |
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var o = obj; |
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keys.slice(0,-1).forEach(function (key) { |
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if (o[key] === undefined) o[key] = {}; |
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o = o[key]; |
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}); |
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var key = keys[keys.length - 1]; |
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if (o[key] === undefined || flags.bools[key] || typeof o[key] === 'boolean') { |
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o[key] = value; |
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} |
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else if (Array.isArray(o[key])) { |
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o[key].push(value); |
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} |
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else { |
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o[key] = [ o[key], value ]; |
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} |
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} |
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function aliasIsBoolean(key) { |
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return aliases[key].some(function (x) { |
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return flags.bools[x]; |
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}); |
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} |
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for (var i = 0; i < args.length; i++) { |
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var arg = args[i]; |
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if (/^--.+=/.test(arg)) { |
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// Using [\s\S] instead of . because js doesn't support the |
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// 'dotall' regex modifier. See: |
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// http://stackoverflow.com/a/1068308/13216 |
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var m = arg.match(/^--([^=]+)=([\s\S]*)$/); |
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var key = m[1]; |
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var value = m[2]; |
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if (flags.bools[key]) { |
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value = value !== 'false'; |
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} |
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setArg(key, value, arg); |
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} |
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else if (/^--no-.+/.test(arg)) { |
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var key = arg.match(/^--no-(.+)/)[1]; |
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setArg(key, false, arg); |
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} |
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else if (/^--.+/.test(arg)) { |
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var key = arg.match(/^--(.+)/)[1]; |
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var next = args[i + 1]; |
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if (next !== undefined && !/^-/.test(next) |
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&& !flags.bools[key] |
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&& !flags.allBools |
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&& (aliases[key] ? !aliasIsBoolean(key) : true)) { |
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setArg(key, next, arg); |
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i++; |
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} |
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else if (/^(true|false)$/.test(next)) { |
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setArg(key, next === 'true', arg); |
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i++; |
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} |
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else { |
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setArg(key, flags.strings[key] ? '' : true, arg); |
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} |
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} |
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else if (/^-[^-]+/.test(arg)) { |
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var letters = arg.slice(1,-1).split(''); |
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var broken = false; |
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for (var j = 0; j < letters.length; j++) { |
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var next = arg.slice(j+2); |
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if (next === '-') { |
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setArg(letters[j], next, arg) |
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continue; |
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} |
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if (/[A-Za-z]/.test(letters[j]) && /=/.test(next)) { |
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setArg(letters[j], next.split('=')[1], arg); |
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broken = true; |
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break; |
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} |
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if (/[A-Za-z]/.test(letters[j]) |
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&& /-?\d+(\.\d*)?(e-?\d+)?$/.test(next)) { |
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setArg(letters[j], next, arg); |
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broken = true; |
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break; |
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} |
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if (letters[j+1] && letters[j+1].match(/\W/)) { |
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setArg(letters[j], arg.slice(j+2), arg); |
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broken = true; |
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break; |
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} |
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else { |
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setArg(letters[j], flags.strings[letters[j]] ? '' : true, arg); |
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} |
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} |
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var key = arg.slice(-1)[0]; |
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if (!broken && key !== '-') { |
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if (args[i+1] && !/^(-|--)[^-]/.test(args[i+1]) |
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&& !flags.bools[key] |
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&& (aliases[key] ? !aliasIsBoolean(key) : true)) { |
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setArg(key, args[i+1], arg); |
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i++; |
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} |
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else if (args[i+1] && /true|false/.test(args[i+1])) { |
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setArg(key, args[i+1] === 'true', arg); |
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i++; |
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} |
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else { |
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setArg(key, flags.strings[key] ? '' : true, arg); |
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} |
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} |
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} |
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else { |
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if (!flags.unknownFn || flags.unknownFn(arg) !== false) { |
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argv._.push( |
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flags.strings['_'] || !isNumber(arg) ? arg : Number(arg) |
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); |
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} |
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if (opts.stopEarly) { |
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argv._.push.apply(argv._, args.slice(i + 1)); |
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break; |
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} |
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} |
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} |
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Object.keys(defaults).forEach(function (key) { |
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if (!hasKey(argv, key.split('.'))) { |
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setKey(argv, key.split('.'), defaults[key]); |
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(aliases[key] || []).forEach(function (x) { |
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setKey(argv, x.split('.'), defaults[key]); |
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}); |
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} |
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}); |
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if (opts['--']) { |
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argv['--'] = new Array(); |
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notFlags.forEach(function(key) { |
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argv['--'].push(key); |
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}); |
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} |
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else { |
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notFlags.forEach(function(key) { |
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argv._.push(key); |
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}); |
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} |
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return argv; |
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}; |
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function hasKey (obj, keys) { |
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var o = obj; |
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keys.slice(0,-1).forEach(function (key) { |
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o = (o[key] || {}); |
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}); |
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var key = keys[keys.length - 1]; |
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return key in o; |
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} |
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function isNumber (x) { |
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if (typeof x === 'number') return true; |
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if (/^0x[0-9a-f]+$/i.test(x)) return true; |
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return /^[-+]?(?:\d+(?:\.\d*)?|\.\d+)(e[-+]?\d+)?$/.test(x); |
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} |
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