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How to define optional methods in Swift protocol?
Is it possible in Swift? If not then is there a workaround to do it?
19 Answers
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Python non-greedy regexes
How do I make a python regex like "(.*)" such that, given "a (b) c (d) e" python matches "b" instead of "b) c (d" ?
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How to delete duplicate lines in a file without sorting it in Unix?
Is there a way to delete duplicate lines in a file in Unix?
9 Answers
9
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:after vs. ::after
Is there any functional difference between the CSS 2.1 :after and the CSS 3 ::after pseudo-selectors (other than ::after not being supported in older browsers)? Is there any practical reason to use the newer specification?
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Rails migrations: self.up and self.down versus change
Looks like the new rails version has "change" versus self.up and self.down methods.
3 Answers
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How to detect if a property exists on an ExpandoObject?
In javascript you can detect if a property is defined by using the undefined keyword:
11 Answers
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How and where are Annotations used in Java?
What are the major areas that we can use Annotations? Is the feature a replacement for XML based configuration?
15 Answers
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How to efficiently concatenate strings in go
In Go, a string is a primitive type, which means it is read-only, and every manipulation of it will create a new string.
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JavaScript - cannot set property of undefined
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How do you create a remote Git branch?
I created a local branch which I want to 'push' upstream. There is a similar question here on Stack Overflow on how to track a newly created remote branch.
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