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How to elegantly rename all keys in a hash in Ruby? [duplicate]
I have a Ruby hash:
11 Answers
11
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How to use a variable for the key part of a map
...mentation in the newest documentation its like this: Map keys are strings by default: [a:1] is equivalent to ['a':1]. This can be confusing if you define a variable named a and that you want the value of to be the key in your map. If this is the case, then you must escape >the key by adding par...
Timer function to provide time in nano seconds using C++
...tionally some dual core AMDs may also cause a problem. See the second post by sebbbi, where he states:
QueryPerformanceCounter() and
QueryPerformanceFrequency() offer a
bit better resolution, but have
different issues. For example in
Windows XP, all AMD Athlon X2 dual
core CPUs return ...
Why would a static nested interface be used in Java?
... access Foo will not be able to access Foo.Bar either. (From source code - bytecode or reflection can access Foo.Bar even if Foo is package-private!)
It is acceptable style to create a nested interface this way if you expect it to be used only from the outer class, so that you do not create a new t...
Best way to convert an ArrayList to a string
... want to output it in order using the toString of each element separated by tabs. Is there any fast way to do this? You could loop through it (or remove each element) and concatenate it to a String but I think this will be very slow.
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How to write multiple line property value using PropertiesConfiguration?
...the same
escaped notation used for Java Strings. The list separator ("," by
default), can also be escaped:
key = This \n string \t contains \, escaped \\ characters \u0020
Backslashes are more difficult.
Lists and arrays:
You can specify a list of values in your properties file by us...
Override compile flags for single files
... builds.
You should be able to countermand the -Weffc++ flag for foo.cpp by doing
set_source_files_properties(foo.cpp PROPERTIES COMPILE_FLAGS -Wno-effc++)
This should have the effect of adding -Wno-effc++ after -Weffc++ in the compiler command, and the latter setting wins. To see the full com...
How do I delete unpushed git commits?
... answered Jul 7 '10 at 17:50
dbyrnedbyrne
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What is the difference between JavaConverters and JavaConversions in Scala?
...d the closest corresponding Scala collection, and vice versa. This is done by creating wrappers that implement either the Scala interface and forward the calls to the underlying Java collection, or the Java interface, forwarding the calls to the underlying Scala collection.
JavaConverters uses the ...
What is the difference between “screen” and “only screen” in media queries?
...
Let's break down your examples one by one.
@media (max-width:632px)
This one is saying for a window with a max-width of 632px that you want to apply these styles. At that size you would be talking about anything smaller than a desktop screen in most cases. ...