Some things I’ve learned or discovered during the last few days. Nothing special, but taking notes is usually a good idea, so there.
Get values fromInfo.plist
For example, app name and version:
info = NSBundle.mainBundle.infoDictionary
info.objectForKey("CFBundleName")
info.objectForKey("CFBundleVersion")
Open an URL in the default browser:
url = NSURL.URLWithString("http://municode.de/")
NSWorkspace.sharedWorkspace.openURL(url)
Run an AppleScript
Sometimes you want to execute a short AppleScript snippet to save yourself some time by using the higher-level functionality AS offers instead of writing a huge block of MacRuby. (For example, to eject a FS volume.) Here’s how you do it (the AS is deliberately simple):
script = "display dialog (\"omg\")"
pnt = Pointer.new_with_type("@")
as = NSAppleScript.alloc.initWithSource(script)
as.executeAndReturnError(pnt)
More info at developer.apple.com.
Delete nodes/tags from an XML document
Let’s say you have a variable doc which represents a NSXMLDocument, and you want to remove all em and cite tags:
error = Pointer.new_with_type("@")
selectors = [ "//em", "//cite" ].join("|")
doc.nodesForXPath( selectors, error: error ).each do |n|
n.detach
end
More notes might follow at a later date. :)
