Issue #14022 has been updated by sorah (Sorah Fukumori).

Status changed from Open to Feedback

It appears like `yield_self` or `%s` formatting can satisfy the use cases noted here.

Changing this ticket to Feedback for now. @sawa, could you update your opinion by taking a look into this discussion?

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Feature #14022: String#surround
https://bugs.ruby-lang.org/issues/14022#change-71012

* Author: sawa (Tsuyoshi Sawada)
* Status: Feedback
* Priority: Normal
* Assignee: 
* Target version: 
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After joining the elements of an array into a string using `Array#join`, I frequently need to put substrings before and after the string. In such case, I would have to use either of the following:

```ruby
[1, 2, 3].join(", ").prepend("<").concat(">") # => "<1, 2, 3>"
"<#{[1, 2, 3].join(", ")}>"                   # => "<1, 2, 3>"
"<" + [1, 2, 3].join(", ") + ">"              # => "<1, 2, 3>"
```

but none of them is concise enough. I wish there were `String#surround` that works like this:

```ruby
[1, 2, 3].join(", ").surround("<", ">") # => "<1, 2, 3>"
```



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