大约有 44,000 项符合查询结果（耗时：0.0727秒） [XML]
How to convert a Django QuerySet to a list
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You could do this:
import itertools
ids = set(existing_answer.answer.id for existing_answer in existing_question_answers)
answers = itertools.ifilter(lambda x: x.id not in ids, answers)
Read when QuerySets are evaluated and note that it is not good to load the whole result into memory (e.g. via...
How to change the foreign key referential action? (behavior)
I have set up a table that contains a column with a foreign key, set to ON DELETE CASCADE (delete child when parent is deleted)
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How to use z-index in svg elements?
... fill="green" cx="100" cy="105" r="20"/>
</svg>
Here the fork of your jsFiddle.
Solution (alternative)
The tag use with the attribute xlink:href and as value the id of the element. Keep in mind that might not be the best solution even if the result seems fine. Having a bit of tim...
How to COUNT rows within EntityFramework without loading contents?
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Thank you for clearing that up for me. Just wanted to be sure. :)
– Jo Smo
Jul 8 '15 at 18:39
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jQuery: more than one handler for same event
What happens if I bind two event handlers to the same event for the same element?
8 Answers
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How do I put an 'if clause' in an SQL string?
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For your specific query, you can do:
UPDATE purchaseOrder
SET purchaseOrder_status = 'COMPLETED'
WHERE purchaseOrder_ID = '@purchaseOrder_ID' and
not exists (SELECT *
FROM itemsOrdered...
mysql :: insert into table, data from another table?
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@InSane: 1) give an answer 2) correct the question formatting. Don't miss the order next time ;-)
– zerkms
Nov 22 '10 at 2:09
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facebook: permanent Page Access Token?
...access token that does not expire.
I suggest using the Graph API Explorer for all of these steps except where otherwise stated.
0. Create Facebook App
If you already have an app, skip to step 1.
Go to My Apps.
Click "+ Add a New App".
Setup a website app.
You don't need to change its permissi...
Rails raw SQL example
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side note: records_array will be of different types for different database adapters. If you're using PG, it will be an instance of PG::Result, not Array.
– tybro0103
Jan 14 '14 at 17:28
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How to round an image with Glide library?
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.into(imageView);
Glide V3:
You can use RoundedBitmapDrawable for circular images with Glide. No custom ImageView is required.
Glide.with(context).load(url).asBitmap().centerCrop().into(new BitmapImageViewTarget(imageView) {
@Override
protected void setResource(Bitmap ...