我试图将一长串文本截断为一定长度，但也希望确保截断的结果以空白结尾.之后我还要加上一个省略号.
例如:
"This is a very long string that has more characters than I want in it."
变成这样:
"This is a very long string that..."
我从这里开始，但很明显，这并不能解决在空白处结束字符串的问题.
<%= item.description[0..30] %>…
我试图将一长串文本截断为一定长度，但也希望确保截断的结果以空白结尾.之后我还要加上一个省略号.
例如:
"This is a very long string that has more characters than I want in it."
变成这样:
"This is a very long string that..."
我从这里开始，但很明显，这并不能解决在空白处结束字符串的问题.
<%= item.description[0..30] %>…
s[0..30].gsub(/\s\w+\s*$/, '...')
最初的答案在30个字符的子字符串以空白字符结尾的情况下不起作用.这就解决了这个问题.
>> desc="This is some text it is really long"
>> desc[0..30].gsub(/\s\w+$/,'...')
"This is some text it is really "
>> desc[0..30].gsub(/\s\w+\s*$/,'...')
"This is some text it is..."