Issue #10927 has been updated by Robert A. Heiler.


I don't think this is likely to get in because it breaks backwards compatibility.

The prior usage could well be a case for .delete when it comes to .gsub:

"foo".delete("o") #=> "f"

Perhaps .delete could allow to replace just n occurences instead, to also
allow .sub behaviour, such as:

"foo".delete('o',1) #=> "fo"


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Feature #10927: [PATCH] Add default empty string to string replacements
https://bugs.ruby-lang.org/issues/10927#change-51732

* Author: zimba tm
* Status: Open
* Priority: Normal
* Assignee: 
----------------------------------------
Hi ruby devs !

A common case for string substitution is to just remove the found items. This patch changes the `String#[g]sub[!]` methods to allow that.

Old usages:

    "foo".sub("o", "") #=> "fo"
    "foo".gsub("o", "") #=> "f"

New usages:

    "foo".sub("o") #=> "fo"
    "foo".gsub("o") #=> "f"

Applies to the bang versions as well.

This commit changes the return values of String#gsub! call with a single
argument and no block from an Enumerator to a String. The previous usage
would return an Enumerator containing each match, which is not a string
substitution. A suitable replacement should nonetheless be found before
merging this commit.

Before:

    "foo".gsub("o") #=> #<Enumerator: "foo":gsub("o")>

Replacement:

    ???



---Files--------------------------------
0001-Add-a-default-empty-string-to-string-replacements.patch (2.2 KB)


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