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Does the 'mutable' keyword have any purpose other than allowing the variable to be modified by a con
...lly the const veil is pierced comprehensively. It is completely up to the API designer to ensure that mutable doesn't destroy the const concept and is only used in useful special cases. The mutable keyword helps because it clearly marks data members that are subject to these special cases.
In prac...
List of Rails Model Types
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:time
:timestamp
These are documented under column in the Active Record API.
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How to resolve “Error: bad index – Fatal: index file corrupt” when using Git
...epository called dev, for example, and your submodule repository is called api.
if you are inside of api and you get the error mentioned in this question:
error: bad index file sha1 signature
fatal: index file corrupt
The index file will NOT be inside of a .git folder. In fact, the .git won't ev...
How to write a UTF-8 file with Java?
...ink shown in the question, then it tells you the version of the Commons IO API where the write APIs were introduced. It looks like the write APIs were introduced from v2.0 onwards.
– A_M
May 13 '14 at 8:15
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The most sophisticated way for creating comma-separated Strings from a Collection/Array/List?
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Use the Google Guava API's join method:
Joiner.on(",").join(collectionOfStrings);
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Rails update_attributes without save?
...=> 'Sierra', :years => '1990', :looks => 'Sexy'}
Source: http://api.rubyonrails.org/classes/ActiveRecord/Base.html
attributes=(new_attributes, guard_protected_attributes = true)
Allows you to set all the attributes at once by passing in a hash with keys matching the attribute names (whic...
Find text string using jQuery?
...oundin will be a jQuery object that contains any matched element. See the API information at: https://api.jquery.com/contains-selector/
One thing to note with the '*' wildcard is that you'll get all elements, including your html an body elements, which you probably don't want. That's why most of ...
Why do you not use C for your web apps?
...b which is especially frustrating is to desperately search for the 'magic' API call that will do what you want to do.
Think about how to do 'pretty thousands' in:
C#
String.Format("{0:n}"...
Java
new DecimalFormat("0.00"); ...
PHP
number_format($amount, 2); ...
ANSI C
sprintf("%'.2f", am...
How does Python manage int and long?
...e well if you actually bothered to read the PEP, it explicitly says: The C API remains unchanged; C code will still need to be aware of the difference between short and long ints. (The Python 3.0 C API will probably be completely incompatible.) The PyArg_Parse*() APIs already accept long ints, as l...
Alternative to itoa() for converting integer to string C++? [duplicate]
...Tew : Thanks for your concern, but I guess I'm familiar enough with both C API and C++ API to handle sprintf, and know when (and how) to use it safely, and when NOT to use it at all... :-D
– paercebal
Sep 7 '11 at 10:52
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