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20个命令行工具监控 Linux 系统性能 - 更多技术 - 清泛网 - 专注C/C++及内核技术
20个命令行工具监控 Linux 系统性能原文出处：Tecmint.Com-Ravi Saive译文出处：Linux story-FOREST对于每个系统管理员或网络管理员来说，每天要监控和调试 Linux 系统性...原文出处： Tecmint.Com-Ravi Saive 译文出处：Linux story-FOREST
对于每...
Ruby: How to get the first character of a string
...= "Smith"
first_name = "John"
Then you can get the initials very cleanly and readably:
puts first_name.initial # prints J
puts last_name.initial # prints S
The other method mentioned here doesn't work on Ruby 1.8 (not that you should be using 1.8 anymore anyway!--but when this answer was p...
Uninstall old versions of Ruby gems
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For removing older versions of all installed gems, following 2 commands are useful:
gem cleanup --dryrun
Above command will preview what gems are going to be removed.
gem cleanup
Above command will actually remove them.
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Function to clear the console in R and RStudio
I am wondering if there is a function to clear the console in R and, in particular, RStudio I am looking for a function that I can type into the console, and not a keyboard shortcut.
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How to stop unwanted UIButton animation on title change?
In iOS 7 my UIButton titles are animating in and out at the wrong time - late. This problem does not appear on iOS 6. I'm just using:
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Redis connection to 127.0.0.1:6379 failed - connect ECONNREFUSED
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After you install redis, type from terminal:
redis-server
and you'll have redis running
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How can I verify a Google authentication API access token?
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For user check, just post
get the access token as accessToken and post it and get the response
https://www.googleapis.com/oauth2/v1/tokeninfo?access_token=accessToken
you can try in address bar in browsers too, use httppost and response in java also
response will be like
{
"i...
Queue.Queue vs. collections.deque
I need a queue which multiple threads can put stuff into, and multiple threads may read from.
7 Answers
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Converting XML to JSON using Python?
I've seen a fair share of ungainly XML->JSON code on the web, and having interacted with Stack's users for a bit, I'm convinced that this crowd can help more than the first few pages of Google results can.
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What is the difference between Reader and InputStream?
What is the difference between Reader and InputStream?
And when to use what?
If I can use Reader for reading characters why I will use inputstream, I guess to read objects?
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