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What does $$ (dollar dollar or double dollar) mean in PHP?
..._variable
And has the value 'test'
EDIT after @Jhonny's comment :
Doing a $$$ ?
Well, the best way to know is to try ;-)
So, let's try this portion of code :
$real_variable = 'test';
$name = 'real_variable';
$name_of_name = 'name';
echo $name_of_name . '<br />';
echo $$name_of_name...
Unable to export Apple production push SSL certificate in .p12 format
...using Urban airship in my application for push notification. So, I need to download the push SSL certificate from Apple developer portal. After downloading, I added that in keychain access. But no private key was created for the certificate. When I tried to right click and export the certificate, I ...
Would it be beneficial to begin using instancetype instead of id?
... ARC, with the release of Lion in 2011. One thing complicating widespread adoption in Cocoa is that all the candidate methods have to be audited to see if they do [self alloc] rather than [NameOfClass alloc], because it would be super confusing to do [SomeSubClass convenienceConstructor], with +conv...
How to create a file in a directory in java?
If I want to create a file in C:/a/b/test.txt , can I do something like:
11 Answers
1...
Using reflect, how do you set the value of a struct field?
... developers use it. For example, the Go fmt and json packages. The package documentation has links to the source code files under the heading Package files.
The Go json package marshals and unmarshals JSON from and to Go structures.
Here's a step-by-step example which sets the value of a struct ...
Case insensitive string as HashMap key
...creating an ordered struct in ColdFusion that preserves the ability to use dot notation. Instead of var struct = {} or var struct = structnew() you can use var struct = createObject('java','java.util.TreeMap').init(createObject('java','java.lang.String').CASE_INSENSITIVE_ORDER); FUGLY, but it works ...
Handle ModelState Validation in ASP.NET Web API
...oncern, I would suggest you use action filter for model validation, so you don't need to care much how to do validation in your api controller:
using System.Net;
using System.Net.Http;
using System.Web.Http.Controllers;
using System.Web.Http.Filters;
namespace System.Web.Http.Filters
{
public ...
Changing the background drawable of the searchview widget
...ew text field style using themes, styles and inheritance in XML as you can do with background of items in ActionBar dropdown. This is because selectableItemBackground is listed as styleable in R.stylable, whereas searchViewTextField (theme attribute that we're interested in) is not. Thus, we cannot ...
Should I use JSLint or JSHint JavaScript validation? [closed]
...sionally be cases where a linter will complain about something that you've done intentionally -- for example, you know that you should always use === but just this one time you have a good reason to use ==. But even then, with ESLint you have the option to specify eslint-disable around the line in q...
Convert RGB to RGBA over white
... I'm looking for an algorithm, or at least idea of an algorithm for how to do so.
7 Answers
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