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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 {
...
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...
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...
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...
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...
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
...
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...
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
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What character encoding should I use for a HTTP header?
...ecial chars like ✰ (Which is not ASCII)
Tip: you can encode anything in JSON.
Edit: may not be obvious at first, the character encoding defined in the header only applies for the response body, not for the header itself. (As it would cause a chicken-&-egg problem.)
I'd like to sum up all ...
一文了解大数据领域创业的机会与方向 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...是消费者(用户)的需求。用户不需要知道也没兴趣知道你处理大数据是用Hadoop还是Spark、原理是什么、架构是什么，用户最关心的是大数据到底怎么用，用了能为自己带来什么好处。
今天我们将从“外部大环境”、“行业内部环...