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What's the meaning of interface{}?
...all types implement at least zero methods, and satisfying an interface is done automatically, all types satisfy the empty interface.
That means that if you write a function that takes an interface{} value as a parameter, you can supply that function with any value.
(That is what Msg represents i...
ERROR 1396 (HY000): Operation CREATE USER failed for 'jack'@'localhost'
...VOKE and DROP USER to do it right. I'm indebted to all three answers (this one just happens to be the one that bailed me out of my present predicament).
– Russ Bateman
Apr 5 '11 at 17:05
...
RuntimeException: Unable to instantiate application
...ther of them. A similar question has been discussed before at here and someone has filled a bug report in Android Issues Tracker.
I don't think you should concern too much about this verbose error log at the moment, if you look more logs before and after this red error in Logcat, you can see the fu...
How do I enable standard copy paste for a TextView in Android?
...
Can one do it for EditTextPreference?
– powder366
Mar 9 '13 at 13:17
1
...
“unrecognized selector sent to instance” error in Objective-C
...f the string it will not, and the receiver will get an error if it expects one. It is easy to miss the colon if you are dynamically creating the event name.
The receiver code options look like this:
- (void)doneBtnTui:(id)sender {
NSLog(@"Done Button - with sender");
}
or
- (void)doneBtnTui {
...
How to view/delete local storage in Firefox?
...
You can delete localStorage items one by one using Firebug (a useful web development extension) or Firefox's developer console.
Firebug Method
Open Firebug (click on the tiny bug icon in the lower right)
Go to the DOM tab
Scroll down to and expand localSto...
When should one use HTML entities?
...re in which situations I'm supposed to use the HTML entities and for which ones should I just use the UTF-8 character. For example,
...
Remove non-utf8 characters from string
...e sequence 11110xxx 10xxxxxx * 3
){1,100} # ...one or more times
)
| . # anything else
/x
END;
preg_replace($regex, '$1', $text);
It searches for UTF-8 sequences, and captures those into group 1. It also matches single bytes that could ...
What's the difference between => , ()=>, and Unit=>
...ame: => Type
The => Type notation stands for call-by-name, which is one of the many ways parameters can be passed. If you aren't familiar with them, I recommend taking some time to read that wikipedia article, even though nowadays it is mostly call-by-value and call-by-reference.
What it mea...
Does every Core Data Relationship have to have an Inverse?
...it into this case.
Assume you modeled it as follows:
Note you have a to-one relationship called "type", from SocialApp to SocialAppType. The relationship is non-optional and has a "deny" delete rule.
Now consider the following:
SocialApp *socialApp;
SocialAppType *appType;
// assume entity inst...