大约有 44,000 项符合查询结果（耗时：0.0401秒） [XML]
How do I add a Fragment to an Activity with a programmatically created content view
...ework expects the fragment's constructor (with no parameters) to be public and visible. Moving the fragment into the Activity as an inner class, or creating a new java file for the fragment fixes that.
The second issue is that when you're adding a fragment this way, you must pass a reference to the...
How to change identity column values programmatically?
...
You need to
set identity_insert YourTable ON
Then delete your row and reinsert it with different identity.
Once you have done the insert don't forget to turn identity_insert off
set identity_insert YourTable OFF
...
How to COUNT rows within EntityFramework without loading contents?
... Can you tell me why is it different with the SelectMany? I don't understand. I do it without SelectMany but it gets really slow because I have over 20 million records. I tried the answer from Yang Zhang and works great, just wanted to know what the SelectMany does.
– mikesof...
How to generate unique ID with node.js
... I might be able to help.
Firstly, in node, you only have a single thread and are supposed to use callbacks. What will happen with your code, is that base.getID query will get queued up by for execution, but the while loop will continusouly run as a busy loop pointlessly.
You should be able to sol...
How to UPSERT (MERGE, INSERT … ON DUPLICATE UPDATE) in PostgreSQL?
...o do an upsert, which is what MySQL calls INSERT ... ON DUPLICATE UPDATE and the standard supports as part of the MERGE operation.
...
How to include “zero” / “0” results in COUNT aggregate?
...
You want an outer join for this (and you need to use person as the "driving" table)
SELECT person.person_id, COUNT(appointment.person_id) AS "number_of_appointments"
FROM person
LEFT JOIN appointment ON person.person_id = appointment.person_id
GROUP BY p...
How to handle anchor hash linking in AngularJS
Do any of you know how to nicely handle anchor hash linking in AngularJS ?
27 Answers
...
jQuery selector regular expressions
...idn't really know the name of what I was looking for. Ive had another look and using attribute filters is what I was after.
– Joel Cunningham
Oct 10 '08 at 5:49
...
Can I use view pager with views (not with fragments)
...tation is to just return the view as the key as well. FragmentPageAdapter handles all the key-to-view stuff for you and thus just asks you to create a fragment instead.
– themightyjon
Sep 7 '15 at 16:24
...
How to read contacts on Android 2.0
I'm working on Android 2.0 and am trying to receive a list of all contacts.
9 Answers
...