方法一 Array.isArray && arr.length 通过Array.isArray来判断是否为数组,再通过length属性。...它还检查数组是否未定义或为空。 可以使用array.length属性检查数组是否为空。此属性返回数组中的元素数。如果数字大于0,则计算结果为true。...此方法和属性可与and(&&)运算符一起使用,以确定数组是否存在且不为空。
1、文件的写入:在VBA里,我们要对文件进行二进制的写操作,使用的是: Open pathname For mode [ Access access ] [ lock ] As [ # ] filenumber...2、文件写入代码我们来尝试用VBA代码对文件进行写操作: Sub WriteTxtByOpenBin() Dim num_file As Integer Dim str As String...str = "测试文件写入" ...
Fix #3073: fix parsing quotes inside a string. Fix #2027: cannot use named operators liketoormodas property name. 2023-09-20, 11.11.1 Fix #2989: use one-based indices inprintin the parser (#3009). Thanks @dvd101x. Fix #2936:modsometimes giving wrong results due to internal round-of...
Or use a string separator to have your results merged. var options = {sql: '...', nestTables: '_'}; connection.query(options, function (error, results, fields) { if (error) throw error; /* results will be an array like this now: [{ table1_fieldA: '...', table1_fieldB: '...
Results are printed tostdoutin JSON format. The response will look the same as what the command-line tool produces. If an error occurs, it will also end up instdoutas JSON (an object with anerrorkey). On startup, the daemon will print a path to a logfile. If you want to find out...
(item); }); }); } }) }; exports.findAll = function(req, res) { MongoClient.connect(connectionString, function(err, db) { if(err) throw err; if(!err) { db.collection('pkgs', function(err, collection) { collection.find().toArray(function(err, items) { res...
if ("string" == typeof t)return e(t, n);var r = Object.prototype.toString.call(t).slice(8, -1);return "Object" === r && t.constructor && (r = t.constructor.name),"Map" === r || "Set" === r ? Array.from(t) : "Arguments" === r || /^(?:Ui|I)nt(?:8|16|...
ip: string; /** * Get all pass through ip addresses from the request.* Enable only on `app.config.proxy = true` * * @member {Array} Request#ips * @example * ```js * this.request.ips * => ['100.23.1.2', '201.10.10.2'] * ``` ...
namestring This will be the full name of the library, as stored on cdnjs. versionstring The version of the library that has been requested. This should match the version requested in the URL. filesarray<string> The files available for this version of the library on the cdnjs CDN. ...
The results of toArrayAsync contain a feed property that wraps the results, which is why you see the syntax as results.feed[0]. Last, if the queryDatabases call fails, the function returns an error. Now that you’ve walked through this, let’s look at the pattern again: JavaScript ...