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Scala: join an iterable of strings
...ariant exists in which you can specify a prefix and suffix too.
See here for an implementation using foldLeft, which is much more verbose, but perhaps worth looking at for education's sake.
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Should I git ignore xcodeproject/project.pbxproj file?
..., I offen got xcodeproject/project.pbxproj file changed, but useless info for me, it for compile.
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bower command not found
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I would like to add that this is not the most correct answer if you work with multiple projects. Bower should be installed in the node_moduleslocally from package.json and not globally, since different projects can use different versions (that's the whole point of npm). T...
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 global flag is explained her...
Why does Ruby have both private and protected methods?
Before I read this article , I thought access control in Ruby worked like this:
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How to find the installed pandas version
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Check pandas.__version__:
In [76]: import pandas as pd
In [77]: pd.__version__
Out[77]: '0.12.0-933-g281dc4e'
Pandas also provides a utility function, pd.show_versions(), which reports the version of its dependencies as well:
In [53]: pd.show_versions(as_json...
Calling remove in foreach loop in Java [duplicate]
...call remove on a collection when iterating through the collection using a foreach loop? For instance:
11 Answers
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How to specialize std::hash::operator() for user-defined type in unordered containers?
To support user-defined key types in std::unordered_set<Key> and std::unordered_map<Key, Value>
one has to provide operator==(Key, Key) and a hash functor:
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How do I adjust the anchor point of a CALayer, when Auto Layout is being used?
Note : Things have moved on since this question was asked; see here for a good recent overview.
11 Answers
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HashSet vs. List performance
It's clear that a search performance of the generic HashSet<T> class is higher than of the generic List<T> class. Just compare the hash-based key with the linear approach in the List<T> class.
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