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为什么你有10年经验，但成不了专家？ - 杂谈 - 清泛网 - 专注C/C++及内核技术
...的教材、任务，如何开始呢？
1、避免自动完成
自检问题：你今天的工作，是有意识地刻意提升，还是在自动完成？
比如一开始学习驾驶的时候，你会去刻意地记忆如何换挡、如何刹车，当遇到情况需要刹车的时候，你就...
Best way to store a key=>value array in JavaScript?
...upation programmer
height Object {feet: 6, inches: 1}
In a language like php this would be considered a multidimensional array with key value pairs, or an array within an array. I'm assuming because you asked about how to loop through a key value array you would want to know how to get an object (...
Host 'xxx.xx.xxx.xxx' is not allowed to connect to this MySQL server
...ccess the MySQL Database on your actual server (say your remote address is 123.123.123.123 at port 3306 as user 'root' and I want to change permissions on database 'dataentry'. Remember to change the IP Address, Port, and database name to your settings)
mysql -u root -p
Enter password: <enter p...
创业测试：50个迹象表明你真该创业了 - 资讯 - 清泛网 - 专注C/C++及内核技术
...个很吓人的过程，需要大量辛勤的劳作。但是是否创业这问题日夜都在困扰着你。至于原因，或许你仅仅是不满足于自己的现状;或许你是渴望开一家属于自己的店铺或是咨询公司;再或者只是你觉得你的生活需要一个显著的变化...
App Inventor 2开发计步器与定位器 - App Inventor 2 中文网 - 清泛IT论坛，有思想、有深度
...能。
2.主题：编写“健身宝”手机应用程序
3.问题：
（1）如何获取走路步数、距离？
（2）如何计算走路时间？
（3）如何获得当前位置？
（4）如何存储信息？
4.规划：
（1）利用pedome...
Removing all non-numeric characters from string in Python
... this is the most efficient way, but:
>>> ''.join(c for c in "abc123def456" if c.isdigit())
'123456'
The ''.join part means to combine all the resulting characters together without any characters in between. Then the rest of it is a list comprehension, where (as you can probably guess) ...
创业 比“直男癌”更可怕的是“技术癌” - 资讯 - 清泛网 - 专注C/C++及内核技术
...方案成本过高，则实用性大大降低，仍然无法真正地解决问题。更有甚者，明明市场上已有采用通用技术的、低成本的解决方案，却仅仅因为对技术的痴迷而生搬硬套地非要用高科技、高大上的手段去替代现有方案，却无视其带...
提问 - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
...sp;使用下面程序时，为什么每次都会把实际数字设为0？
问题出在你的判断逻辑上：
这里和你拼接的字符串比较，非常容易出错，比如多了或少了一个空格等。实际编程中判断最好使用数字，也就是你选择了难度等级是第几...
Why does changing 0.1f to 0 slow down performance by 10x?
... credits to Carl Hetherington [1])
[1] http://carlh.net/plugins/denormals.php
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Comma separator for numbers in R?
...rn a vector of characters. I'd only use that for printing.
> prettyNum(12345.678,big.mark=",",scientific=FALSE)
[1] "12,345.68"
> format(12345.678,big.mark=",",scientific=FALSE)
[1] "12,345.68"
EDIT: As Michael Chirico says in the comment:
Be aware that these have the side effect of padd...