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How can I rename a database column in a Ruby on Rails migration?
...st db:migrate as usual or however you go about your business.
For Rails 4:
While creating a Migration for renaming a column, Rails 4 generates a change method instead of up and down as mentioned in the above section. The generated change method is:
$ > rails g migration ChangeColumnName
w...
What is Objective C++? [closed]
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edited Oct 31 '18 at 4:17
Cœur
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answe...
Printing 1 to 1000 without loop or conditionals
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votes
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How do I remove a folder from source control with TortoiseSVN?
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edited Sep 29 '14 at 9:32
answered Aug 5 '10 at 13:35
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Why is “a” != “a” in C?
...ored in different locations. Doing so essentially looks like this:
if(0x00403064 == 0x002D316A) // Two memory locations
{
printf("Yes, equal");
}
Use the following code to compare two string values:
#include <string.h>
...
if(strcmp("a", "a") == 0)
{
// Equal
}
Additionally, "a...
How to control the line spacing in UILabel
...et paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.lineSpacing = 40
let attrString = NSMutableAttributedString(string: "Swift Answer")
attrString.addAttribute(.paragraphStyle, value:paragraphStyle, range:NSMakeRange(0, attrString.length))
var tableViewCell = NSTableCellView()
tableViewCe...
Error installing libv8: ERROR: Failed to build gem native extension
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614
try this one:
gem install libv8 -v '3.16.14.3' -- --with-system-v8
Note : Because libv8 i...
How to get a string after a specific substring?
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419
The easiest way is probably just to split on your target word
my_string="hello python world ,...
Passing variable number of arguments around
... Servy
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answered Oct 15 '08 at 17:11
SmacLSmacL
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Printing hexadecimal characters in C
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134
You are seeing the ffffff because char is signed on your system. In C, vararg functions such as ...