Top "Merge" questions

Merging is a generic term for combining two or more related sets of data.

Why does Pandas inner join give ValueError: len(left_on) must equal the number of levels in the index of "right"?

I'm trying to inner join DataFrame A to DataFrame B and am running into an error. Here's my join statement: …

python pandas join merge inner-join
How to make svn diff produce file that patch would apply, when svn cp or svn mv was used?

The scenario is: svn cp or mv some file modify that file svn diff > mypatch On other machine (same …

svn merge diff patch
Why is a 3-way merge advantageous over a 2-way merge?

Wikipedia says a 3-way merge is less error-prone than a 2-way merge, and often times doesn't need user intervention. Why …

version-control merge conflict three-way-merge
Lua - merge tables?

I need to merge two tables, with the contents of the second overwriting contents in the first if a given …

merge lua lua-table
Python: Dictionary merge by updating but not overwriting if value exists

If I have 2 dicts as follows: d1 = {('unit1','test1'):2,('unit1','test2'):4} d2 = {('unit1','test1'):2,(…

python dictionary merge compare
Undo a git merge (hasn't been pushed yet)

I just committed some changes into one of my feature branches ("feedback_tab") then, checked out "master" and merged them …

git merge revert
MySQL - How to create a new table that is a join on primary key of two existing tables

I have two existing tables, with different fields, except for Primary ID (a varchar, not an int). I want to …

mysql join merge create-table
How to use Regex to move everything onto one line in notepad++

I'm trying to figure out how to use Regex to merge the contents of my text file (25 lines of data) …

regex merge notepad++ lines
How can I merge two STL maps?

How can I merge two STL maps into one? They both have the same key and value types (map<…

c++ merge stl maps stdmap
How to git cherrypick all changes introduced in specific branch

Background info: Due to restrictions in workflow with out existing systems, we need to set up a somewhat unorthodox git …

git merge git-cherry-pick