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How to copy a collection from one database to another in MongoDB
... It works on PW protected DBs you just need to pass the auth in the params
– Ben
Jul 17 '17 at 14:05
2
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How to find patterns across multiple lines using grep?
...ferent lines:
grep -Pzl '(?s)abc.*\n.*efg' <your list of files>
Params:
-P Use perl compatible regular expressions (PCRE).
-z Treat the input as a set of lines, each terminated by a zero byte instead of a newline. i.e. grep treats the input as a one big line.
-l list matching filenames...
Detect when an image fails to load in Javascript
...
/**
* Tests image load.
* @param {String} url
* @returns {Promise}
*/
function testImageUrl(url) {
return new Promise(function(resolve, reject) {
var image = new Image();
image.addEventListener('load', resolve);
image.addEventListener('...
Are JavaScript strings immutable? Do I need a “string builder” in JavaScript?
...thing like var myString = "abbdef"; myString[2] = 'c'. The string manipulation methods such as trim, slice return new strings.
In the same way, if you have two references to the same string, modifying one doesn't affect the other
let a = b = "hello";
a = a + " world";
// b is not affected
Howeve...
Token Authentication for RESTful API: should the token be periodically changed?
...
It is good practice to have mobile clients periodically renew their authentication token. This of course is up to the server to enforce.
The default TokenAuthentication class does not support this, however you can extend it to achieve this functionality.
For example:
...
How to Programmatically Add Views to Views
...ctor (e.g., Button myButton = new Button();), you'll need to call setLayoutParams on the newly constructed view, passing in an instance of the parent view's LayoutParams inner class, before you add your newly constructed child to the parent view.
For example, you might have the following code in yo...
Multiple actions were found that match the request in Web Api
...efault",
routeTemplate: "api/{controller}/{id}",
defaults: new { id = RouteParameter.Optional });
But in order to have multiple actions with the same http method you need to provide webapi with more information via the route like so:
routes.MapHttpRoute(
name: "API Default",
routeTemplate: "api/{...
What Automatic Resource Management alternatives exist for Scala?
...ty much like one another. I did see a pretty cool example using continuations, though.
9 Answers
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Most Useful Attributes [closed]
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You can pass "true" as one of the parameters to System.Obsolete which causes the warning to become an error therefore breaking the build. Obviously this should be done once you have cleaned up all the warnings. :)
– Adrian Clark
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jQuery AJAX cross domain
...ery will pass it's own callback name, so you need to get that from the GET params.
And as Stefan Kendall posted, $.getJSON() is a shorthand method, but then you need to append 'callback=?' to the url as GET parameter (yes, value is ?, jQuery replaces this with its own generated callback method).
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