[ARROW-10959] [C++] Add scalar string join kernel

• Type: New Feature
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 5.0.0
• Component/s: C++, Python
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/26882
• Assignee: Antoine Pitrou
• Reporter: Maarten Breddels
• Created: 18/Dec/20 14:47
• Updated: 11/Jan/23 08:16
• Resolved: 07/Jun/21 17:08

Description

Similar to Python's str.join

For example, if the separator were "-", this takes input:

ListArray<list<item: string>>
[
  ["foo","bar"],
  ["push","pop"]
]

and returns output:

Array<string>
[ 
  "foo-bar",
  "push-pop"
] 

Issue Links

• is a child of: ARROW-555 [C++] String algorithm library for StringArray/BinaryArray
• is related to: ARROW-12709 [C++] Add variadic string join kernel
• links to: GitHub Pull Request #8990