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What is the method for converting radians to degrees?
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360 degrees is 2*PI radians
You can find the conversion formulas at: http://en.wikipedia.org/wiki/Radian#Conversion_between_radians_and_degrees.
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Convert normal date to unix timestamp
...mply use the unary + operator
(+new Date('2012.08.10')/1000).toFixed(0);
http://xkr.us/articles/javascript/unary-add/ - look under Dates.
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How do I select an element with its name attribute in jQuery? [duplicate]
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it's very simple getting a name:
$('[name=elementname]');
Resource:
http://www.electrictoolbox.com/jquery-form-elements-by-name/ (google search: get element by name jQuery - first result)
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Abusing the algebra of algebraic data types - why does this work?
...re operators for other constructs, such as parallelism and disruption.
See http://en.wikipedia.org/wiki/Algebra_of_Communicating_Processes. There is also a paper online named "A Brief History of Process Algebra".
I am working on extending programming languages with ACP. Last April I presented a res...
Byte order mark screws up file reading in Java
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EDIT: I've made a proper release on GitHub: https://github.com/gpakosz/UnicodeBOMInputStream
Here is a class I coded a while ago, I just edited the package name before pasting. Nothing special, it is quite similar to solutions posted in SUN's bug database. Incorpora...
Mysql ibdata 丢失或损坏如何通过frm&ibd 恢复数据 - 更多技术 - 清泛网 - ...
...复你的数据。my.ini的设置为 innodb_file_per_table = 1。
参考 http://blog.chinaunix.net/uid-24111901-id-2627876.html
1、找回表结构，如果表结构没有丢失直接到下一步
a、先创建一个数据库，这个数据库必须是没有表和任何操作的。
b、创建...
What is “callback hell” and how and why does RX solve it?
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First let's describe callback hell again.
Imagine a case were we must do http to get three resources - person, planet and galaxy. Our objective is to find the galaxy the person lives in. First we must get the person, then the planet, then the galaxy. That's three callbacks for three asynchronous o...
使用TokuMX配置Replica Set集群 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...细对比请参见《TokuMX vs. MongoDB 性能对比》。
下载地址：http://www.tokutek.com/tokumx-for-mongodb/
TokuMX目前只有Linux版本，下载完成后
解压(tar -zxvf xxxx.tar.gz)
进入bin目录，新建配置文件如：tokumx.conf （文件名随意）
内容如下：
lo...
Filter rows which contain a certain string
...verse)
# The data. Data expo 09. ASA Statistics Computing and Graphics
# http://stat-computing.org/dataexpo/2009/the-data.html
df <- read_csv("Downloads/2008.csv")
print(dim(df))
# [1] 7009728 29
benchmark(
"str_detect" = {df %>% filter(str_detect(Dest, 'MCO|BWI'))},
"grepl" = {df ...
Creating a singleton in Python
...ion of a class means and how to implement that definition. See for example http://code.activestate.com/recipes/498149/, which essentially recreates C-style structs in Python using metaclasses. The thread What are some (concrete) use-cases for metaclasses? also provides some examples, they generally ...