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Can't find the 'libpq-fe.h header when trying to install pg gem
...l-9.3/bin/p* /usr/local/bin. I installed postgres 9.3 like so: yum install http://yum.postgresql.org/9.3/redhat/rhel-6-x86_64/pgdg-redhat93-9.3-1.noarch.rpm && yum install postgresql93 postgresql93-contrib postgresql93-server postgresql93-devel
– JoePasq
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What are the lesser known but useful data structures?
...e a few:
Suffix tries. Useful for almost all kinds of string searching (http://en.wikipedia.org/wiki/Suffix_trie#Functionality). See also suffix arrays; they're not quite as fast as suffix trees, but a whole lot smaller.
Splay trees (as mentioned above). The reason they are cool is threefold:
...
Difference between the 'controller', 'link' and 'compile' functions when defining a directive
...l>
and you want to access animal from inside of "leopard" directive.
http://egghead.io/lessons/angularjs-directive-communication will be helpful to know about inter-directive communication
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How to create ENUM type in SQLite?
...ype in SQLite, only the following:
NULL
INTEGER
REAL
TEXT
BLOB
Source: http://www.sqlite.org/datatype3.html
I'm afraid a small, custom enum table will be required in your case.
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9个常用iptables配置实例 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...p --sport 22 -m state --state NEW,ESTABLISHED -j ACCEPT
类似的，对于HTTP/HTTPS(80/443)、pop3(110)、rsync(873)、MySQL(3306)等基于tcp连接的服务，也可以参照上述命令配置。
对于基于udp的dns服务，使用以下命令开启端口服务：
iptables -A OUTPUT -p ud...
Split delimited strings in a column and insert as new rows [duplicate]
...the unnest function from Hadley Wickham's tidyr package (see release notes http://blog.rstudio.org/2014/12/08/tidyr-0-2-0/)
> library(tidyr)
> library(dplyr)
> mydf
V1 V2
2 1 a,b,c
3 2 a,c
4 3 b,d
5 4 e,f
6 . .
> mydf %>%
mutate(V2 = strsplit(as.character(...
When should I use malloc in C and when don't I?
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The thread has exited with code 0 (0x0) with no unhandled exception
...y right clicking into the output window and uncheck Thread Exit Messages.
http://msdn.microsoft.com/en-us/library/bs4c1wda.aspx
In addition to program out from your application, the Output window
can display the information about:
Modules the debugger has loaded or unloaded.
Except...
Change column type from string to float in Pandas
...y what you want, but what if you wanted to save some memory and use a more compact dtype, like float32, or int8?
to_numeric() gives you the option to downcast to either 'integer', 'signed', 'unsigned', 'float'. Here's an example for a simple series s of integer type:
>>> s = pd.Series([1, 2...
Why can't I forward-declare a class in a namespace using double colons?
...eUploader: {
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