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Do I need to manually close an ifstream?
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NO
This is what RAII is for, let the destructor do its job. There is no harm in closing it manually, but it's not the C++ way, it's programming in C with classes.
If you want to close the file before the end of a function you can always use a neste...
Why are ToLookup and GroupBy different?
...k on demand a few at a time.
Logically they are the same thing but the performance implications of each are completely different. Calling ToLookup means I want a cache of the entire thing right now organized by group. Calling GroupBy means "I am building an object to represent the question 'what w...
Do we still need end slashes in HTML5?
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Void elements only have a start tag; end tags must not be specified for void elements.
W3C | WHATWG
That being said it's not strict parsing in HTML5 so it won't do any major harm.
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Search in all files in a project in Sublime Text 3
Is there a way to search for a string in all files inside a project in Sublime Text 3? The string is not a method.
5 Answer...
argparse store false if unspecified
...default to True when the command-line argument is not present.
The source for this behavior is succinct and clear: http://hg.python.org/cpython/file/2.7/Lib/argparse.py#l861
The argparse docs aren't clear on the subject, so I'll update them now: http://hg.python.org/cpython/rev/49677cc6d83a
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How do I convert a Ruby class name to a underscore-delimited symbol?
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Rails comes with a method called underscore that will allow you to transform CamelCased strings into underscore_separated strings. So you might be able to do this:
FooBar.name.underscore.to_sym
But you will have to install ActiveSupport just to do that, as ipsum says.
If you don't want to ins...
Ruby Regexp group matching, assign variables on 1 line
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You don't want scan for this, as it makes little sense. You can use String#match which will return a MatchData object, you can then call #captures to return an Array of captures. Something like this:
#!/usr/bin/env ruby
string = "RyanOnRails: ...
Why doesn't Java Map extend Collection?
...lections and
collections are not mappings. Thus, it
makes little sense for Map to extend
the Collection interface (or vice
versa).
If a Map is a Collection, what are the
elements? The only reasonable answer
is "Key-value pairs", but this
provides a very limited (and not
particul...
How to print full stack trace in exception?
For example, in one place...
3 Answers
3
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How persistent is localStorage?
I'm depending heavily on localStorage for a plugin I'm writing. All the user settings are stored in it. Some settings require the user the write regex'es and they would be sad if their regex rules are gone at some point.
So now I am wondering just how persistent the localStorage is.
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