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What does “@private” mean in Objective-C?
... to clarify, methods are always public in Objective-C. There are ways of "hiding" method declarations, though—see this question for more information.
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Swapping column values in MySQL
...work:
UPDATE swap_test s1, swap_test s2 SET s1.x=s1.y, s1.y=s2.x WHERE s1.id=s2.id;
Essentially, the 1st table is the one getting updated and the 2nd one is used to pull the old data from.
Note that this approach requires a primary key to be present.
This is my test schema:
CREATE TABLE `swap_t...
Aligning a float:left div to center?
...
you may need to add vertical-align:middle while using display:inline-block.
– ibsenv
May 24 '15 at 10:59
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Deleting a Google App Engine application
...ine SDK 1.2.6 it's possible to delete apps completely. But beware, the app-id won't be usable again.
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Javascript/jQuery: Set Values (Selection) in a multiple Select
...lue='" + e + "']").prop("selected", true);
});
Working Example http://jsfiddle.net/McddQ/1/
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Is there a print_r or var_dump equivalent in Ruby / Ruby on Rails?
...1
updated_at: 2009-05-26 22:46:29.501245
current_login_ip: 127.0.0.1
id: "1"
current_login_at: 2009-05-24 20:20:46.627254
login_count: "1"
last_login_ip:
last_login_at:
login: admin
attributes_cache: {}
=> nil
>>
If you want to just preview some string contents, try us...
Why do some websites add “Slugs” to the end of URLs? [closed]
...ssing" I think the minority is extremely tiny.
– eyelidlessness
Jun 2 '09 at 15:59
4
@eyelidlessn...
Node / Express: EADDRINUSE, Address already in use - Kill server
... currently running stacks here and there) it makes no sense to put that inside the exit event...
On crash, do process.on('uncaughtException', ..) and on kill do process.on('SIGTERM', ..)
That being said, SIGTERM (default kill signal) lets the app clean up, while SIGKILL (immediate termination) won...
Jackson - Deserialize using generic class
... the class as a parameter during runtime. Like this public <T> void deSerialize(Class<T> clazz { ObjectMapper mapper = new ObjectMapper(); mapper.readValue(jsonString, new TypeReference<Json<T>>() {}); }
– gnjago
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Show or hide element in React
... around with React.js for the first time and cannot find a way to show or hide something on a page via click event. I am not loading any other library to the page, so I am looking for some native way using the React library. This is what I have so far. I would like to show the results div when th...