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How can I rename a database column in a Ruby on Rails migration?
... :new_column
You'll probably want to create a separate migration to do this. (Rename FixColumnName as you will.):
script/generate migration FixColumnName
# creates db/migrate/xxxxxxxxxx_fix_column_name.rb
Then edit the migration to do your will:
# db/migrate/xxxxxxxxxx_fix_column_name.rb
clas...
Create JSON-object the correct way
...trying to create an JSON object out of a PHP array. The array looks like this:
5 Answers
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Easiest way to split a string on newlines in .NET?
...a string into newlines in .NET and the only way I know of to split strings is with the Split method. However that will not allow me to (easily) split on a newline, so what is the best way to do it?
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Error installing libv8: ERROR: Failed to build gem native extension
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try this one:
gem install libv8 -v '3.16.14.3' -- --with-system-v8
Note : Because libv8 is the interface for the V8 engine used by therubyracer,
you may need to use libv8, even if you have V8 installed already. If
you wi...
Number of visitors on a specific page
I'd like to see the number of visitors on a specific page (for which I have URL).
I don't find in Analytics where to enter a URL in order to look for statistics for this specific page.
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How to restore to a different database in sql server?
I have a backup of Database1 from a week ago. The backup is done weekly in the scheduler and I get a .bak file. Now I want to fiddle with some data so I need to restore it to a different database - Database2 .
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Comparing boxed Long values 127 and 128
...on works properly, but when they are greater than or equal to 128 , comparison fails.
4 Answers
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How to insert an item into an array at a specific index (JavaScript)?
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What you want is the splice function on the native array object.
arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert).
In this example we will create an array...
Why cast an unused function parameter value to void?
In some C project, I have seen this code:
2 Answers
2
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What is the difference between SIGSTOP and SIGTSTP?
...lly resumed with SIGCONT. The main differences between them are:
SIGSTOP is a signal sent programmatically (eg: kill -STOP pid ) while SIGTSTP (for signal - terminal stop) may also be sent through the tty driver by a user typing on a keyboard, usually Control-Z.
SIGSTOP cannot be ignored. SIGTSTP ...