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Checking if output of a command contains a certain string in a shell script
I'm writing a shell script, and I'm trying to check if the output of a command contains a certain string. I'm thinking I probably have to use grep, but I'm not sure how. Does anyone know?
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What's the “Content-Length” field in HTTP header?
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Combine this answer with the answer from Tom Cabanski and you have all the information you need. In case of text you can count the number of characters since ASCII is 8 bit.
– hcpl
Sep 24 '12 at 8:45
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Rake just one migration
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rake db:migrate:redo VERSION=xxxxxxx, but that will run the down and then the up step. You could do this in conjunction with commenting out the down step temporarily.
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Get an object's class name at runtime
...\w+/g)[1];
The above code gets the entire constructor code as a string and applies a regex to get all 'words'. The first word should be 'function' and the second word should be the name of the class.
Hope this helps.
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How can I access getSupportFragmentManager() in a fragment?
I have a FragmentActivity and I want to use a map fragment within it. I'm having a problem getting the support fragment manager to access it.
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How to use range-based for() loop with std::map?
...t;< std::endl;
}
if you don't plan on modifying the values.
In C++11 and C++14, you can use enhanced for loops to extract out each pair on its own, then manually extract the keys and values:
for (const auto& kv : myMap) {
std::cout << kv.first << " has value " << kv....
Converting between java.time.LocalDateTime and java.util.Date
Java 8 has a completely new API for date and time. One of the most useful classes in this API is LocalDateTime , for holding a timezone-independent date-with-time value.
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How do I update/upsert a document in Mongoose?
Perhaps it's the time, perhaps it's me drowning in sparse documentation and not being able to wrap my head around the concept of updating in Mongoose :)
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Plot correlation matrix into a graph
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Quick, dirty, and in the ballpark:
library(lattice)
#Build the horizontal and vertical axis information
hor <- c("214", "215", "216", "224", "211", "212", "213", "223", "226", "225")
ver <- paste("DM1-", hor, sep="")
#Build the fa...
Singleton with Arguments in Java
I was reading the Singleton article on Wikipedia and I came across this example:
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