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How do you install Boost on MacOS?
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Download MacPorts, and run the following command:
sudo port install boost
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What does “fragment” mean in ANTLR?
...is somewhat akin to an inline function: It makes the grammar more readable and easier to maintain.
A fragment will never be counted as a token, it only serves to simplify a grammar.
Consider:
NUMBER: DIGITS | OCTAL_DIGITS | HEX_DIGITS;
fragment DIGITS: '1'..'9' '0'..'9'*;
fragment OCTAL_DIGITS: '...
Eclipse: The declared package does not match the expected package
...ng Projects into Workspace, choose the folder where the project is located and everything is imported - but the package names of the project don't seem to be what Eclipse expects. The package names all have a prefix:
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Skip callbacks on Factory Girl and Rspec
...efault should be that when I create an object the callbacks are triggered, and I should use a different parameter for the exceptional case. so FactoryGirl.create(:user) should create the user triggering the callbacks, and FactoryGirl.create(:user_without_callbacks) should create the user without th...
What is the easiest way to ignore a JPA field during persistence?
... edited Dec 20 '13 at 7:14
Andrey Atapin
6,69433 gold badges2525 silver badges3434 bronze badges
answered Aug 15 '09 at 13:56
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Regex to Match Symbols: !$%^&*()_+|~-=`{}[]:";'?,./
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/[$-/:-?{-~!"^_`\[\]]/
There are three ranges. '$' to '/', ':' to '?', and '{' to '~'. the last string of characters can't be represented more simply with a range: !"^_`[].
Use an ACSII table to find ranges for character classes.
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Replacing NAs with latest non-NA value
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@BallpointBen 's comment is important and should be included in the answer. Thanks!
– Ben
Mar 6 at 16:43
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Applying a function to every row of a table using dplyr?
...it useful to use adply for scalar functions that I have to apply to each and every row.
7 Answers
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Android SDK manager won't open
So I installed the android sdk for Windows:
29 Answers
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How can I sort a dictionary by key?
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Standard Python dictionaries are unordered. Even if you sorted the (key,value) pairs, you wouldn't be able to store them in a dict in a way that would preserve the ordering.
The easiest way is to use OrderedDict, which remembe...