大约有 36,020 项符合查询结果（耗时：0.0444秒） [XML]
How to concatenate strings of a string field in a PostgreSQL 'group by' query?
... late 2010) have the string_agg(expression, delimiter) function which will do exactly what the question asked for, even letting you specify the delimiter string:
SELECT company_id, string_agg(employee, ', ')
FROM mytable
GROUP BY company_id;
Postgres 9.0 also added the ability to specify an ORDER...
Match multiline text using regular expression
...the Pattern.MULTILINE modifier, I am able to match, but I am not able to do so with (?m).
4 Answers
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How to recognize swipe in all 4 directions
I need to use swipe to recognize swipe gesture down and then right. But on swift UISwipeGestureRecognizer has predeterminate Right direction.. And I don't know how make this for use other directions..
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Jquery - How to make $.post() use contentType=application/json?
... Its not a bad idea, just create a method called $.mvcpost() that does the same as $.post (by copying the linked code) plus changes the contenttype. Then for all the $.post()s that need to be changed, I just have to type 3 extra characters in front. Its much quicker than rewriting them as ...
Access parent URL from iframe
Okay, I have a page on and on this page I have an iframe. What I need to do is on the iframe page, find out what the URL of the main page is.
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EditText maxLines not working - user can still input more lines than set
... Thats what I thought also... Is there a way to limit the inputed lines or do I have to it on backend code programmatically?
– Indrek Kõue
Aug 17 '11 at 14:12
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Angularjs - ng-cloak/ng-show elements blink
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Though the documentation doesn't mention it, it might not be enough to add the display: none; rule to your CSS. In cases where you are loading angular.js in the body or templates aren't compiled soon enough, use the ng-cloak directive ...
str.startswith with a list of strings to test for
...ink.lower().startswith(("js", "catalog", "script", "katalog")):
From the docs:
str.startswith(prefix[, start[, end]])
Return True if string starts with the prefix, otherwise return False. prefix can also be a tuple of prefixes to look for.
Below is a demonstration:
>>> "abcde...
What is the best way to conditionally apply a class?
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If you don't want to put CSS class names into Controller like I do, here is an old trick that I use since pre-v1 days. We can write an expression that evaluates directly to a class name selected, no custom directives are necessary:
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How to send email to multiple recipients using python smtplib?
...)
msg = MIMEText("""body""")
sender = 'me@example.com'
recipients = ['john.doe@example.com', 'john.smith@example.co.uk']
msg['Subject'] = "subject line"
msg['From'] = sender
msg['To'] = ", ".join(recipients)
s.sendmail(sender, recipients, msg.as_string())
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