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how to use sed, awk, or gawk to print only what is matched?
I see lots of examples and man pages on how to do things like search-and-replace using sed, awk, or gawk.
11 Answers
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How to implement a queue with three stacks?
...nown for 3 stacks, but using lazy evaluation which in practice corresponds to having extra internal data structures, so it does not constitute a solution
People near Sedgewick have confirmed they are not aware of a 3-stack solution within all the constraints of the original question
DETAILS
There...
How to revert a merge commit that's already pushed to remote branch?
...s because a merge commit has more than one parent, and Git does not know automatically which parent was the mainline, and which parent was the branch you want to un-merge.
When you view a merge commit in the output of git log, you will see its parents listed on the line that begins with Merge:
com...
How to remove k__BackingField from json when Deserialize
...etting the k_BackingField in my returned json after serializing a xml file to a .net c# object.
13 Answers
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Django migration strategy for renaming a model and relationship fields
I'm planning to rename several models in an existing Django project where there are many other models that have foreign key relationships to the models I would like to rename. I'm fairly certain this will require multiple migrations, but I'm not sure of the exact procedure.
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Does PHP have threading?
...There is nothing available that I'm aware of. The next best thing would be to simply have one script execute another via CLI, but that's a bit rudimentary. Depending on what you are trying to do and how complex it is, this may or may not be an option.
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Objective-C: difference between id and void *
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void * means "a reference to some random chunk o' memory with untyped/unknown contents"
id means "a reference to some random Objective-C object of unknown class"
There are additional semantic differences:
Under GC Only or GC Supported modes, the c...
Optimise PostgreSQL for fast testing
I am switching to PostgreSQL from SQLite for a typical Rails application.
2 Answers
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What is the “Execute Around” idiom?
...ar) I've been hearing about?
Why might I use it, and why might I not want to use it?
8 Answers
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GCC compile error with >2 GB of code
I have a huge number of functions totaling around 2.8 GB of object code (unfortunately there's no way around, scientific computing ...)
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