将字符串拆分为指定大小的块，而不会破坏单词

I need to split a string into chunks according to a specific size. I cannot break words between chunks, so I need to catch when adding the next word will go over chunk size and start the next one (it's ok if a chunk is less than specified size).

我需要根据特定大小将字符串拆分为块。我不能打破块之间的单词，所以我需要抓住当添加下一个单词将超过块大小并启动下一个单词时（如果块小于指定大小则可以）。

Here is my working code, but I would like to find a more elegant way to do this.

这是我的工作代码，但我想找到一种更优雅的方式来做到这一点。

def split_into_chunks_by_size(chunk_size, string)
  string_split_into_chunks = [""]
  string.split(" ").each do |word|
    if (string_split_into_chunks[-1].length + 1 + word.length > chunk_size)
      string_split_into_chunks << word
    else
      string_split_into_chunks[-1] << " " + word
    end
  end
  return string_split_into_chunks
end

2 个解决方案

#1

How about:

怎么样：

str = "split a string into chunks according to a specific size. Seems easy enough, but here is the catch: I cannot be breaking words between chunks, so I need to catch when adding the next word will go over chunk size and start the next one (its ok if a chunk is less than specified size)." 
str.scan(/.{1,25}\W/)
=> ["split a string into ", "chunks according to a ", "specific size. Seems easy ", "enough, but here is the ", "catch: I cannot be ", "breaking words between ", "chunks, so I need to ", "catch when adding the ", "next word will go over ", "chunk size and start the ", "next one (its ok if a ", "chunk is less than ", "specified size)."]

Update after @sawa comment:

@sawa评论后更新：

str.scan(/.{1,25}\b|.{1,25}/).map(&:strip)

This is better as it doesn't require a string to end with \W

这样更好，因为它不需要字符串以\ W结尾

And it will handle words longer than specified length. Actually it will split them, but I assume this is desired behaviour

它将处理超过指定长度的单词。实际上它会分裂它们，但我认为这是理想的行为

#2

@Yuriy, your alternation looks like trouble. How about:

@Yuriy，你的轮换看起来很麻烦。怎么样：

str.scan /\S.{1,24}(?!\S)/
#=> ["split a string into", "chunks according to a", "specific size. Seems easy", "enough, but here is the", "catch: I cannot be", "breaking words between", "chunks, so I need to", "catch when adding the", "next word will go over", "chunk size and Start the", "next one (its ok if a", "chunk is less than", "specified size)."]

#1