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Can I use Objective-C blocks as properties?
...al places use a type def
typedef void(^MyCompletionBlock)(BOOL success, NSError *error);
@property (nonatomic) MyCompletionBlock completion;
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Where can I learn how to write C code to speed up slow R functions? [closed]
...trived example).
Edit 3: There is complexity in that you may run into C++ errors that are, to put it mildly, hard to grok. But to just use Rcpp rather than to extend it, you should hardly ever need it. And while this cost is undeniable, it is far eclipsed by the benefit of simpler code, less boil...
Storing time-series data, relational or non?
... Could you explain how the table is "de-normalised" ? Marcus does have an error in the table, but it is not a normalisation error.
– PerformanceDBA
Feb 3 '11 at 9:25
...
Best way to represent a fraction in Java?
... a BigFraction from a floating-point number.
*
* Warning: round-off error in IEEE floating point numbers can result
* in answers that are unexpected. For example,
* System.out.println(new BigFraction(1.1))
* will print:
* 2476979795053773/2251799813685248
*
* This...
Downloading a large file using curl
...ing is ok with:
if (!$result)
throw new Exception('Download error...');
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updating table rows in postgres using subquery
...
This totally does not work in postgresql 9.5, I get ERROR: 42P01: relation "dummy" does not exist
– user9645
Oct 14 '16 at 14:37
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App Inventor 2 扩展 · App Inventor 2 中文网
...er importing an extension, make sure to restart the companion app, else an error may occur.
Figure 3: An imported extension shown in components palette
2.2 Some sample extensions to try
Here are some sample extension components to experiment with. You can find these in the MIT App Inventor E...
How to use single storyboard uiviewcontroller for multiple subclass
...o the previous view controller. You will be able to recognize them as KVO error messages in the log output.
A couple of approaches you could take:
store the UI elements in a UIView - in a xib file and instantiate it from your base class and add it as a sub view in the main view, typically self.v...
Difference between method and function in Scala
... example:
scala> val f = () => { return "test" }
<console>:4: error: return outside method definition
val f = () => { return "test" }
^
Returning from a function defined in a method does a non-local return:
scala> def f: String = { ...
Node.js + Nginx - What now?
...omain.com;
access_log /var/log/nginx/subdomain.your_domain.access.log;
error_log /var/log/nginx/subdomain.your_domain.error.log debug;
location / {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarder-For $proxy_add_x_forwarded_for;
proxy_set_header Host $http_host...