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How can two strings be concatenated?
...ctors or vectors of different lengths is a bit too flexible in paste() for my liking. For instance, paste(c('a','b'),'blah', c(1,2,3)) results in "a blah 1" "b blah 2" "a blah 3". Basically, it creates a vector of strings the same length as the longest vector that's passed in, and loops the other ve...
Use of Finalize/Dispose method in C#
... base.Dispose( isDisposing );
}
}
I've posted this implementation on my blog at: How to Properly Implement the Dispose Pattern
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How do you kill all current connections to a SQL Server 2005 database?
...@SPID to SELECT @sKillConnection statement so that it wouldn't try to kill my current connection, which would generate an error message.
– Luis Perez
Feb 8 '12 at 19:44
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Git Cherry-pick vs Merge Workflow
...oth, but people who do not want to be experts in version control (which in my experience has included many colleagues who are damn good at what they do, but don't want to spend the extra time) have an easier time just merging.
Even with a merge-heavy workflow rebase and cherry-pick are still usefu...
How to use the PI constant in C++
...clude <math.h>
and the value of pi can be accessed via:
M_PI
In my math.h (2014) it is defined as:
# define M_PI 3.14159265358979323846 /* pi */
but check your math.h for more. An extract from the "old" math.h (in 2009):
/* Define _USE_MATH_DEFINES before including math.h ...
Getting MAC Address
... getnode() returns something different every time I restart my windows 7 laptop.
– nu everest
Nov 15 '14 at 21:52
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“Invalid form control” only in Google Chrome
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you solved my problem. But pay attention that pattern doesn't seem to be universally acceptable in type="number" field
– João Pimentel Ferreira
Jul 24 '17 at 21:05
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How do I find which rpm package supplies a file I'm looking for?
... 5.1.6-23.2.el5_3 package, but the file appears to not to be installed on my filesystem.
7 Answers
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How to establish a connection pool in JDBC?
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If you need a standalone connection pool, my preference goes to C3P0 over DBCP (that I've mentioned in this previous answer), I just had too much problems with DBCP under heavy load. Using C3P0 is dead simple. From the documentation:
ComboPooledDataSource cpds = new...
Change multiple files
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I used this to replace two different lines in all my website config files with a one-liner below. sed -i.bak "s/supercache_proxy_config/proxy_includes\/supercache_config/g; s/basic_proxy_config/proxy_include\/basic_proxy_config/g" sites-available/* Don't forget to dele...