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Formula to determine brightness of RGB color
I'm looking for some kind of formula or algorithm to determine the brightness of a color given the RGB values. I know it can't be as simple as adding the RGB values together and having higher sums be brighter, but I'm kind of at a loss as to where to start.
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How to use if statements in underscore.js templates?
... null is not the same as undefined, it would still produce an error
– xorinzor
Apr 2 '13 at 17:45
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Create a variable name with “paste” in R?
See below:
4 Answers
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How does SIGINT relate to the other termination signals such as SIGTERM, SIGQUIT and SIGKILL?
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– Jonathan Leffler
Oct 29 '10 at 14:05
TTY Demystified has some easily digestable information on how signals interact ...
新闻传播中如何让沉默的数据说话 - 资讯 - 清泛网 - 专注C/C++及内核技术
...价值。这一点，曾经有人将不同时期的口号与时代特征相连接，形成别开生面的新闻报道，其价值基础就是历史数据的积累。
数据还可以类比为实际生活中可感知的对象。比如，说中国春运大军的人数之多，就类比为相当于让...
How do you force a CIFS connection to unmount
I have a CIFS share mounted on a Linux machine. The CIFS server is down, or the internet connection is down, and anything that touches the CIFS mount now takes several minutes to timeout, and is unkillable while you wait. I can't even run ls in my home directory because there is a symlink pointin...
App Inventor 2 中文网VIP专享内容 · App Inventor 2 中文网
...ventor 2 FTP 上传下载全方案总结
【MySQL】App Inventor 2 如何连接MySQL数据库（阿里云数据库）
【短信平台】App Inventor 2 接入阿里云短信服务，实现短信验证码功能
产品级技巧
【EXCEL】App Inventor 2 实现导出Exce...
Difference between two dates in Python
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I have this error on the console: type object 'datetime.datetime' has no attribute 'strptime'
– mauguerra
Dec 7 '11 at 18:00
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How to fix SSL certificate error when running Npm on Windows?
... package with npm, it doesn't work. After a long wait, I eventually get an error 'tunneling socket could not be established, sutatusCode=403'.
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Remove all occurrences of a value from a list?
In Python remove() will remove the first occurrence of value in a list.
23 Answers
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