匹配空格但不匹配换行符 [英] Match whitespace but not newlines

问题描述

有时我想匹配空格而不是换行符.

I sometimes want to match whitespace but not newline.

到目前为止，我一直在使用 [ ].有什么不那么尴尬的方式吗?

So far I've been resorting to [ ]. Is there a less awkward way?

推荐答案

Perl 5.10 及更高版本支持辅助垂直和水平字符类，v 和 h，以及通用空白字符类 s

Perl versions 5.10 and later support subsidiary vertical and horizontal character classes, v and h, as well as the generic whitespace character class s

最干净的解决方案是使用水平空白字符类h.这将匹配 ASCII 集中的制表符和空格、扩展 ASCII 中的不间断空格或任何这些 Unicode 字符

The cleanest solution is to use the horizontal whitespace character class h. This will match tab and space from the ASCII set, non-breaking space from extended ASCII, or any of these Unicode characters

U+0009 CHARACTER TABULATION
U+0020 SPACE
U+00A0 NO-BREAK SPACE (not matched by s)

U+1680 OGHAM SPACE MARK
U+2000 EN QUAD
U+2001 EM QUAD
U+2002 EN SPACE
U+2003 EM SPACE
U+2004 THREE-PER-EM SPACE
U+2005 FOUR-PER-EM SPACE
U+2006 SIX-PER-EM SPACE
U+2007 FIGURE SPACE
U+2008 PUNCTUATION SPACE
U+2009 THIN SPACE
U+200A HAIR SPACE
U+202F NARROW NO-BREAK SPACE
U+205F MEDIUM MATHEMATICAL SPACE
U+3000 IDEOGRAPHIC SPACE

垂直空间模式v用处不大，但匹配这些字符

The vertical space pattern v is less useful, but matches these characters

U+000A LINE FEED
U+000B LINE TABULATION
U+000C FORM FEED
U+000D CARRIAGE RETURN
U+0085 NEXT LINE (not matched by s)

U+2028 LINE SEPARATOR
U+2029 PARAGRAPH SEPARATOR

有七个垂直空白字符匹配 v，十八个水平空白字符匹配 h.s 匹配二十三个字符

There are seven vertical whitespace characters which match v and eighteen horizontal ones which match h. s matches twenty-three characters

所有空白字符都是垂直或水平，没有重叠，但它们不是真子集，因为h也匹配U+00A0NO-BREAK SPACE 和 v 也匹配 U+0085 NEXT LINE，但都没有被 s

All whitespace characters are either vertical or horizontal with no overlap, but they are not proper subsets because h also matches U+00A0 NO-BREAK SPACE, and v also matches U+0085 NEXT LINE, neither of which are matched by s

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