These heavy equipment operator training schools are designed to give someone who knows little or nothing about the trade the opportunity to earn while they learn. The average length of an operating engineer apprenticeship is three to four years.
Conceptually, a merge branches operation has four steps: 1  Developer selects changes in the origin. 2  Source control tool applies some changes automatically to the target. 3  Developer reviews the results and resolves any conflicts.  Commit.
If a changeset is not the head of a branch, it has one or more child changesets (it is then the parent of its child changesets). The working directory can be updated to any commited changeset of the repository, which then becomes the parent of the working directory.