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Replacing some characters in a string with another character
I have a string like AxxBCyyyDEFzzLMN and I want to replace all the occurrences of x , y , and z with _ .
5 Answers
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Throwing cats out of windows
Imagine you're in a tall building with a cat. The cat can survive a fall out of a low story window, but will die if thrown from a high floor. How can you figure out the longest drop that the cat can survive, using the least number of attempts?
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Why does sed not replace all occurrences?
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You should add the g modifier so that sed performs a global substitution of the contents of the pattern buffer:
echo dog dog dos | sed -e 's:dog:log:g'
For a fantastic documentation on sed, check http://www.grymoire.com/Unix/Sed.html. This g...
Upgrade Node.js to the latest version on Mac OS
Currently I am using Node.js v0.6.16 on Mac OS X 10.7.4. Now I want to upgrade it to the latest Node.js v0.8.1. But after downloading and installing the latest package file from nodejs.org, I found that system is still using v0.6.16 instead of v0.8.1 when I typed "node -v" in a terminal. Is there an...
How to PUT a json object with an array using curl
...f data to enter into database. The user interface to enter the data isn't good for bulk entry, so I'm trying to formulate a command line equivalent. When I examine the network request of the UI in chrome, I see a PUT request of a json object. When I try to replicate the request
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What is the difference between concurrency and parallelism?
What is the difference between concurrency and parallelism?
37 Answers
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Testing the type of a DOM element in JavaScript
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You can use typeof(N) to get the actual object type, but what you want to do is check the tag, not the type of the DOM element.
In that case, use the elem.tagName or elem.nodeName property.
if you want to get really creative, you can use a dictionary of tagnames a...
C++11 features in Visual Studio 2012
...ersion of Visual Studio 2012 (the next version after VS2010) is now available .
7 Answers
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Is optimisation level -O3 dangerous in g++?
I have heard from various sources (though mostly from a colleague of mine), that compiling with an optimisation level of -O3 in g++ is somehow 'dangerous', and should be avoided in general unless proven to be necessary.
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ld cannot find an existing library
I am attempting to link an application with g++ on this Debian lenny system. ld is complaining it cannot find specified libraries. The specific example here is ImageMagick, but I am having similar problems with a few other libraries too.
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