大约有 16,380 项符合查询结果（耗时：0.0343秒） [XML]
Can I click a button programmatically for a predefined intent?
...re there is no need of displaying UI.
Can I get the "Send" button click from the MMS-SMSProvider in Android?
3 Answers
...
Can I make the foreign key field optional in Django model
...
Sure, just add blank=True, null=True for each field that you want to remain optional like
subject = models.ForeignKey(subjects, blank=True, null=True)
share
|
improve this answer
|
...
Query a parameter (postgresql.conf setting) like “max_connections”
...
You can use SHOW:
SHOW max_connections;
This returns the currently effective setting. Be aware that it can differ from the setting in postgresql.conf as there are a multiple ways to set run-time parameters in PostgreSQL. To reset the "original" s...
Install autoreconf on OS X v10.7 (Lion)?
I'm attempting to re-install Ruby 1.9.3 with a patch that will allow me to use ruby-debug .
6 Answers
...
setup cron tab to specific time of during weekdays
I am trying to setup a cron job on a Ubuntu server. We want the cron job to run the script at certain times of the day and on some specific days of the week. For example, we want to setup a cron job that runs the script with the following sequence:
...
Parallel.ForEach vs Task.Run and Task.WhenAll
...
In this case, the second method will asynchronously wait for the tasks to complete instead of blocking.
However, there is a disadvantage to use Task.Run in a loop- With Parallel.ForEach, there is a Partitioner which gets created to avoid making more...
Path.Combine absolute with relative path strings
I'm trying to join a Windows path with a relative path using Path.Combine .
7 Answers
...
ggplot: How to increase spacing between faceted plots?
I have several faceted histograms (obtained with the command below) which are nicely plotted one under the other. I would like to increase the spacing between them, however, they are tight.
...
Best way to generate random file names in Python
In Python, what is a good, or the best way to generate some random text to prepend to a file(name) that I'm saving to a server, just to make sure it does not overwrite. Thank you!
...
Assign variables to child template in {% include %} tag Django
I have this code(which doesn't give me expected result)
1 Answer
1
...