大约有 40,000 项符合查询结果（耗时：0.1006秒） [XML]
Using psql how do I list extensions installed in a database?
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In psql that would be
\dx
See the manual for details: http://www.postgresql.org/docs/current/static/app-psql.html
Doing it in plain SQL it would be a select on pg_extension:
SELECT *
FROM pg_extension
http://www.postgresql.org/docs/current/static/catalog-pg-extension.html
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Can I install/update WordPress plugins without providing FTP access?
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I had to do: sudo chown -R www-data wp-content as well as granting write permissions
– mikermcneil
Feb 12 '12 at 20:32
5
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How to position one element relative to another with jQuery?
...holder">placeholder 2</div>
Here is the fiddle: http://jsfiddle.net/QrrpB/1657/
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Creating a simple XML file using python
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Yattag http://www.yattag.org/ or https://github.com/leforestier/yattag provides an interesting API to create such XML document (and also HTML documents).
It's using context manager and with keyword.
from yattag import Doc, indent
doc, t...
Remove blue border from css custom-styled button in Chrome
...rk:
button:focus {outline:0;}
Check it out or JSFiddle: http://jsfiddle.net/u4pXu/
Or in this snippet:
button.launch {
background-color: #F9A300;
border: none;
height: 40px;
padding: 5px 15px;
color: #ffffff;
font-size: 16px;
font-weight: 300;
margin-top: 10px;
margin-right: 10px;
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Postgresql aggregate array
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Use array_agg: http://www.sqlfiddle.com/#!1/5099e/1
SELECT s.name, array_agg(g.Mark) as marks
FROM student s
LEFT JOIN Grade g ON g.Student_id = s.Id
GROUP BY s.Id
By the way, if you are using Postgres 9.1, you don't need to repeat the...
How to make a element expand or contract to its parent container?
...id="containerId">
<svg
id="svgId"
xmlns:svg="http://www.w3.org/2000/svg"
xmlns="http://www.w3.org/2000/svg"
version="1.1"
x="0"
y="0"
width="100%"
height="100%"
viewBox="0 0 800 600"
preserveAspectRatio="none">
<path d="m0 0v600h800...
Base64 length calculation?
...luding the null terminator is silly, especially since we're talking about .net here.
– CodesInChaos
Mar 23 '14 at 16:18
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Why use ICollection and not IEnumerable or List on many-many/one-many relationships?
...one heap object. Compilers which duck-type enumerators (as both C# and vb.net do) can take advantage of this when generating foreach code. If the List<T> is cast to IEnumrable<T> before the foreach, the IEnumerable<T>.GetEnumerator() method will return a heap-allocated object, re...
How to convert PascalCase to pascal_case?
...gt; lib_c
You can test this function here: http://syframework.alwaysdata.net/decamelize
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