From: usa@garbagecollect.jp
To: ruby-core@ruby-lang.org
Subject: [ruby-core:94643] [Ruby master Feature#15588] String#each_chunk and #chunks
Date: Thu, 29 Aug 2019 05:05:38 +0000 (UTC) [thread overview]
Message-ID: <redmine.journal-81241.20190829050538.dc1daa6bdd02b415@ruby-lang.org> (raw)
In-Reply-To: redmine.issue-15588.20190206013518@ruby-lang.org
Issue #15588 has been updated by usa (Usaku NAKAMURA).
Just an idea, this method may be useful to treat data of fixed-length record format if it accepts multi column lengths, such as
```ruby
records = []
fixed_length_records_data.each_slice(7, 10, 20) do |zip, tel, name|
records.push({zip: zip, tel: tel, name: name})
end
```
----------------------------------------
Feature #15588: String#each_chunk and #chunks
https://bugs.ruby-lang.org/issues/15588#change-81241
* Author: Glass_saga (Masaki Matsushita)
* Status: Open
* Priority: Normal
* Assignee:
* Target version: 2.7
----------------------------------------
String#each_chunk iterates chunks of specified size in String.
String#chunks is a shorthand for str.each_chunk(n).to_a.
present:
```ruby
str = <<EOS
20190101 20190102
20190103 20190104
EOS
str.scan(/.{1,9}/m) do |chunk|
p chunk #=> "20190101 "
end
str.scan(/.{1,9}/m) do |chunk|
chunk.strip!
p chunk #=> "20190101"
end
str.scan(/.{1,9}/m) #=> ["20190101 ", "20190102\n", "20190103 ", "20190104\n"]
str.scan(/.{1,9}/m).map(&:strip) #=> ["20190101", "20190102", "20190103", "20190104"]
```
proposal:
```ruby
str = <<EOS
20190101 20190102
20190103 20190104
EOS
str.each_chunk(9) do |chunk|
p chunk #=> "20190101 "
end
str.each_chunk(9, strip: true) do |chunk|
p chunk #=> "20190101"
end
str.chunks(9) #=> ["20190101 ", "20190102\n", "20190103 ", "20190104\n"]
str.chunks(9, strip: true) #=> ["20190101", "20190102", "20190103", "20190104"]
```
---Files--------------------------------
patch.diff (6.56 KB)
--
https://bugs.ruby-lang.org/
prev parent reply other threads:[~2019-08-29 5:05 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <redmine.issue-15588.20190206013518@ruby-lang.org>
2019-02-06 1:35 ` [ruby-core:91414] [Ruby trunk Feature#15588] String#each_chunk and #chunks glass.saga
2019-02-06 3:30 ` [ruby-core:91416] " shyouhei
2019-02-06 12:39 ` [ruby-core:91425] " mame
2019-02-06 14:32 ` [ruby-core:91435] " sawadatsuyoshi
2019-02-06 15:23 ` [ruby-core:91437] " naruse
2019-06-17 4:11 ` [ruby-core:93192] " samuel
2019-06-17 4:13 ` [ruby-core:93193] " samuel
2019-06-17 4:16 ` [ruby-core:93194] " samuel
2019-07-29 9:04 ` [ruby-core:93993] [Ruby master " glass.saga
2019-07-29 9:22 ` [ruby-core:93994] " eregontp
2019-07-29 11:01 ` [ruby-core:93996] " shevegen
2019-07-29 11:56 ` [ruby-core:93998] " manga.osyo
2019-08-29 4:43 ` [ruby-core:94642] " matz
2019-08-29 5:05 ` usa [this message]
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