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Add a default value to a column through a migration
... What do you mean when you say "make sure you update the field manually on the migration"? How does one do that?
– David Argyle Thacker
Jan 8 '16 at 21:51
7
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How to delete and replace last line in the terminal using bash?
... I need to erase the last line shown on the screen (command "clear" erases all the screen, but I need to erase only the line of the progress bar and replace it with the new information).
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What causes java.lang.IncompatibleClassChangeError?
...out recompiling the client code. Java Language Specification §13 details all such changes, most prominently, changing non-static non-private fields/methods to be static or vice versa.
Recompile the client code against the new library, and you should be good to go.
UPDATE: If you publish a public...
Inputting a default image in case the src attribute of an html is not valid?
...body>
</html>
Since the first image doesn't exist, the fallback (the sprites used on this web site*) will display. And if you're using a really old browser that doesn't support object, it will ignore that tag and use the img tag. See caniuse website for compatibility. This element...
How to “pretty” format JSON output in Ruby on Rails
... the code above in a controller, you'll have tons of useless whitespace in all responses, which isn't even needed for client-side debugging as any tools worth their salt (eg. Firebug) already handle prettyprinting JSON.
– lambshaanxy
Sep 20 '11 at 3:37
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How to execute XPath one-liners from shell?
...uld try these tools :
xmlstarlet : can edit, select, transform... Not installed by default, xpath1
xmllint : often installed by default with libxml2-utils, xpath1 (check my wrapper to have --xpath switch on very old releases and newlines delimited output (v < 2.9.9)
xpath : installed via perl's ...
Disable mouse scroll wheel zoom on embedded Google Maps
I am working on a WordPress site where the authors usually embed Google Maps using iFrames in most posts.
30 Answers
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What is the difference between And and AndAlso in VB.NET?
...p;&.
More info here: http://www.panopticoncentral.net/2003/08/18/the-ballad-of-andalso-and-orelse/
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Static member functions error; How to properly write the signature?
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I'm guessing you've done something like:
class Foo
{
static void Bar();
};
...
static void Foo::Bar()
{
...
}
The "static void Foo::Bar" is incorrect. You don't need the second "static".
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Renaming xcode 4 project and the actual folder
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Rename your source folder in the Finder. This will break the project initially because Xcode doesn't automatically detect when the real folders that the virtual (yellow) project folders point to are changed, so all the files inside that folder will turn red in Xcode. Don't worry about that, we'll f...