How to programmatically change the state of all objects of a folder?

Question

How can I programmatically change the state of all objects in a folder to 'published'? All are default objects of Plone 4 as Link, Page, Document, and so.

Answer 1

Cycle all objects in that folder and publish them:

wftool = getToolByName(folder, 'portal_workflow')
for child in folder.objectValues():
    wftool.doActionFor(child, 'publish')