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Django dynamic model fields

...ect additional data in forms and report on the data. The latter bit makes JSONField not a great option, so instead I have the following solution: ...
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How to wrap async function calls into a sync function in Node.js or Javascript?

... /*****sync function defined here *******/ function find_user(req_json, callback) { process.nextTick(function () { users.find(req_json,function (err,data) { if (!err) { callback(null, data); } else { ...
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What's the difference between REST & RESTful

...get, post, put and delete It should return the result only in the form of JSON or XML, atom, OData etc. (lightweight data ) REST based services follow some of the above principles and not all RESTFUL services means it follows all the above principles. It is similar to the concept of: Object orien...
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How to auto-reload files in Node.js?

...e. I just add more parameters for debugging and watching options. package.json "scripts": { "dev": "cross-env NODE_ENV=development nodemon --watch server --inspect ./server/server.js" } The command: nodemon --watch server --inspect ./server/server.js Whereas: --watch server Restart the...
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File uploading with Express 4.0: req.files undefined

... The body-parser module only handles JSON and urlencoded form submissions, not multipart (which would be the case if you're uploading files). For multipart, you'd need to use something like connect-busboy or multer or connect-multiparty (multiparty/formidable i...
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How do you serve a file for download with AngularJS or Javascript?

...wnload using following code. in html <a class="btn" ng-click="saveJSON()" ng-href="{{ url }}">Export to JSON</a> In controller $scope.saveJSON = function () { $scope.toJSON = ''; $scope.toJSON = angular.toJson($scope.data); var blob = new Blob([$scope.toJSON...
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How do I render a partial of a different format in Rails?

I'm trying to generate a JSON response that includes some HTML. Thus, I have /app/views/foo/bar.json.erb : 11 Answers ...
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SQLite 数据库使用指导 · App Inventor 2 中文网

...删除完成”事件。 //setup.sql 等素材名在伴侣由实际素材解析器读取,独立HAP从打包的 rawfile/assets 读取。SQL文件每行一条语句;CSV首行列名,不支持完整CSV引号转义语法。 鸿蒙API18及以上按实际列类型返回数字与文本,中文名...
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XMLHttpRequest Origin null is not allowed Access-Control-Allow-Origin for file:/// to file:/// (Serv

...s to be an open issue (as of Jan 2011). See also: Problems with jQuery getJSON using local files in Chrome share | improve this answer | follow | ...
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What is the difference between RegExp’s exec() function and String’s match() function?

...the g flag And .match() without the g flag is equivalent to .exec(): e1=JSON.stringify(str.match(/nop/))===JSON.stringify(/nop/.exec(str)); //true //e2 ... e4 //true e5=JSON.stringify(str.match(/(ab)a/))===JSON.stringify(/(ab)a/.exec(str)); //true The .exec() function regexp.exec(str) will do...