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SQL Query to concatenate column values from multiple rows in Oracle
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LISTAGG delivers the best performance if sorting is a must(00:00:05.85)
SELECT pid, LISTAGG(Desc, ' ') WITHIN GROUP (ORDER BY seq) AS description
FROM B GROUP BY pid;
COLLECT delivers the best performance if sorting is not needed(00:00:02.90):
SELECT pid, TO_STRING(CAST(COLLECT(Desc) AS v...
Add st, nd, rd and th (ordinal) suffix to a number
...7th
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How can I resize an image using Java?
...d to sit down and write a simple implementation that would address that 80-85% use-cases where you have an image and probably want a thumbnail for it -- either as fast as possible or as good-looking as possible (for those that have tried, you'll notice doing a Graphics.drawImage even with BICUBIC in...
Converting numpy dtypes to native python types
...mpy.asscalar(x) for x in numpy.linspace(1.0, 0.0, 21)]) [1.0, 0.95, 0.9, 0.85, 0.8, 0.75, 0.7, 0.6499999999999999, 0.6, 0.55, 0.5, 0.44999999999999996, 0.3999999999999999, 0.35, 0.29999999999999993, 0.25, 0.19999999999999996, 0.1499999999999999, 0.09999999999999998, 0.04999999999999993, 0.0] As you ...
How do I measure request and response times at once using cURL?
...dian max
Connect: 20 22 0.8 22 26
Processing: 59 85 108.7 68 911
Waiting: 59 85 108.7 67 910
Total: 80 107 108.8 90 932
Percentage of the requests served within a certain time (ms)
50% 90
66% 91
75% 93
80% 95...
译文：理解Java中的弱引用 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...文原文进行研究。
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Java 弱引用
How can I see the request headers made by curl when sending a request to the server?
...o: About to connect() to www.google.com port 80 (#0)
== Info: Trying 209.85.229.104... == Info: connected
== Info: Connected to www.google.com (209.85.229.104) port 80 (#0)
=> Send header, 145 bytes (0x91)
0000: GET / HTTP/1.1
0010: User-Agent: curl/7.16.3 (powerpc-apple-darwin9.0) libcurl/7.16...
Format decimal for percentage values?
...rmat string. This will vary by culture:
String.Format("Value: {0:P2}.", 0.8526) // formats as 85.26 % (varies by culture)
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What is console.log?
...8 in IE9 or IE10
http://msdn.microsoft.com/en-us/library/ie/gg589507(v=vs.85).aspx
http://msdn.microsoft.com/en-us/library/dd565628(v=vs.85).aspx
If you must access the console in IE6 for IE7 use the Firebug Lite bookmarklet
http://getfirebug.com/firebuglite/ look for stable bookmarklet
http:/...
Create a hexadecimal colour based on a string with JavaScript
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Martin Tournoij
22.1k1717 gold badges8585 silver badges116116 bronze badges
answered May 2 '13 at 22:45
Joe FreemanJoe Freeman
...