大约有 40,000 项符合查询结果（耗时：0.0494秒） [XML]
Fix warning “Capturing [an object] strongly in this block is likely to lead to a retain cycle” in AR
...e request object with __block so it can refer to itself. You can fix this by creating a weak reference alongside it.
ASIHTTPRequest *request = [[ASIHTTPRequest alloc] initWithURL:...];
__weak ASIHTTPRequest *wrequest = request;
[request setCompletionBlock:^{
NSDictionary *jsonDictionary = [[C...
Numpy: Get random set of rows from 2D array
...ption is to create a random mask if you just want to down-sample your data by a certain factor. Say I want to down-sample to 25% of my original data set, which is currently held in the array data_arr:
# generate random boolean mask the length of data
# use p 0.75 for False and 0.25 for True
mask = ...
Hide div after a few seconds
...s animations, so what you need to do is make .hide() act like an animation by giving it a duration.
$("#whatever").delay().hide(1);
By giving it a nice short duration, it appears to be instant just like the regular .hide function.
...
How to get the number of days of difference between two dates on mysql?
...(md.end_date, md.start_date) AS days FROM membership_dates md
output::
id entity_id start_date end_date days
1 1236 2018-01-16 00:00:00 2018-08-31 00:00:00 227
2 2876 2015-06-26 00:00:00 2019-06-30 00:00:00 1465
3 3880 1990-06-05 00:0...
Changing .prop using jQuery does not trigger .change event
...
Change event is fired when the value is changed by users interaction on page and not when value is modified using code.
Here you need to use .change() or .trigger("change") after changing the property:
$('input[type="checkbox"][name="something"]').prop("checked", false)....
How to close this ssh tunnel? [closed]
...
Nice answer! By the way, -9 is not needed for kill, considering the process is still working fine ;-)
– Lucio Paiva
Sep 27 '17 at 0:00
...
@OneToMany List vs Set difference
...list, if there is no index column specified, will just be handled as a bag by Hibernate (no specific ordering).
One notable difference in the handling of Hibernate is that you can't fetch two different lists in a single query. For example, if you have a Person entity having a list of contacts and ...
Error Domain=NSURLErrorDomain Code=-1005 “The network connection was lost.”
...d connection instead of trying to re-use them after they have been dropped by the server. To work around this issue, you can disable the Keep-alive mechanism on the server for the iOS clients, or, if you don't have access to the server, you can simply try again the same request when it fails (failu...
MySQL - How to select data by string length
...for CHAR_LENGTH() to get the number of characters in a string.
For multi-byte charsets LENGTH() will give you the number of bytes the string occupies, while CHAR_LENGTH() will return the number of characters.
share
...
Replace first occurrence of string in Python
...)
Return a copy of string s with all occurrences of substring old replaced by new. If the optional argument maxreplace is given, the first maxreplace occurrences are replaced.
>>> u'longlongTESTstringTEST'.replace('TEST', '?', 1)
u'longlong?stringTEST'
...