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How can I rename a database column in a Ruby on Rails migration?
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http://api.rubyonrails.org/classes/ActiveRecord/Migration.html
Under Available Transformations
rename_column(table_name, column_name, new_column_name):
Renames a column but keeps the type and content.
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What does Bump Version stand for?
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Semver is mostly for libs and APIs. It doesn't make sense everywhere.
– Marc.2377
Nov 20 '19 at 1:03
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Get last element of Stream/List in a one-liner
...of course) or not. The statement of Brian Goetz makes a point, further the API documentation states that reduce("", String::concat) is an inefficient but correct solution for string concatenation, which implies maintenance of the encounter order.The intention is well-known,the documentation has to c...
Setting a timeout for socket operations
... timeout on read() operations.
See: http://docs.oracle.com/javase/7/docs/api/java/net/Socket.html
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Is effective C++ still effective?
...probably have an entire chapter on making effective use of the concurrency API. Such a book would also contain different examples, e.g., ones making use of auto variables, range-based for loops, in-class default initializers, as well as the occasional variadic template. To the extent that this book ...
Default string initialization: NULL or Empty? [closed]
... return values from Python scripts, examine values retrieved from external APIs, etc.)
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Assign variable in if condition statement, good practice or not? [closed]
...st') Creates a node.js GLOBAL variable myvar (nodejs.org/docs/latest-v12.x/api/globals.html#globals_global). So if you're like me and used that variable in server request handling (coming back to it after a few seconds when other requests might have dropped in and stuff), you can be surprised at wha...
Getting the first and last day of a month, using a given DateTime object
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Getting month range with .Net API (just another way):
DateTime date = ...
var firstDayOfMonth = new DateTime(date.Year, date.Month, 1);
var lastDayOfMonth = new DateTime(date.Year, date.Month, DateTime.DaysInMonth(date.Year, date.Month));
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What is the purpose of using -pedantic in GCC/G++ compiler?
...so implement the ANSI standard, and, if you are careful in which libraries/api calls you use, under other operating systems/platforms.
The first one, turns off SPECIFIC features of GCC. (-ansi)
The second one, will complain about ANYTHING at all that does not adhere to the standard (not only specif...
Toggle input disabled attribute using jQuery
...rop() instead of attr() on both occurences to get boolean values back. See api.jquery.com/prop
– Manuel Arwed Schmidt
Sep 11 '15 at 15:03
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