[英]RegEx split string into words by space and containing chars
How can one perform this split with the Regex.Split(input, pattern)
method? 如何使用Regex.Split(input, pattern)
方法执行此拆分?
This is a [normal string ] made up of # different types # of characters
Array of strings output: 字符串输出数组:
1. This
2. is
3. a
4. [normal string ]
5. made
6. up
7. of
8. # different types #
9. of
10. characters
Also it should keep the leading spaces, so I want to preserve everything. 而且它应该保留前导空格,所以我想保留所有内容。 A string contains 20 chars, array of strings should total 20 chars across all elements. 一个字符串包含20个字符,字符串数组在所有元素中的总数应为20个字符。
What I have tried: 我试过的
Regex.Split(text, @"(?<=[ ]|# #)")
Regex.Split(text, @"(?<=[ ])(?<=# #")
I suggest matching , ie extracting words, not splitting : 我建议匹配 ,即提取单词,而不是拆分 :
string source = @"This is a [normal string ] made up of # different types # of characters";
// Three possibilities:
// - plain word [A-Za-z]+
// - # ... # quotation
// - [ ... ] quotation
string pattern = @"[A-Za-z]+|(#.*?#)|(\[.*?\])";
var words = Regex
.Matches(source, pattern)
.OfType<Match>()
.Select(match => match.Value)
.ToArray();
Console.WriteLine(string.Join(Environment.NewLine, words
.Select((w, i) => $"{i + 1}. {w}")));
Outcome: 结果:
1. This
2. is
3. a
4. [normal string ]
5. made
6. up
7. of
8. # different types #
9. of
10. characters
You may use 您可以使用
var res = Regex.Split(s, @"(\[[^][]*]|#[^#]*#)|\s+")
.Where(x => !string.IsNullOrEmpty(x));
See the regex demo 见正则表达式演示
The (\\[[^][]*]|#[^#]*#)
part is a capturing group whose value is output to the resulting list along with the split items. (\\[[^][]*]|#[^#]*#)
部分是一个捕获组,其值与拆分项一起输出到结果列表。
Pattern details 图案细节
(\\[[^][]*]|#[^#]*#)
- Group 1: either of the two patterns: (\\[[^][]*]|#[^#]*#)
-组1:以下两种模式之一:
\\[[^][]*]
- [
, followed with 0+ chars other than [
and ]
and then ]
\\[[^][]*]
- [
,后跟0+个除[
和]
以外的字符,然后是]
#[^#]*#
- a #
, then 0+ chars other than #
and then #
#[^#]*#
-a #
,然后是0+,而不是#
,然后是#
|
- or - 要么 \\s+
- 1+ whitespaces \\s+
-1+空格 var s = "This is a [normal string ] made up of # different types # of characters";
var results = Regex.Split(s, @"(\[[^][]*]|#[^#]*#)|\s+")
.Where(x => !string.IsNullOrEmpty(x));
Console.WriteLine(string.Join("\n", results));
Result: 结果:
This
is
a
[normal string ]
made
up
of
# different types #
of
characters
It would be easier using matching approach however it can be done using negative lookeaheads : 使用匹配方法会更容易,但是可以使用负前瞻性符号来完成 :
[ ](?![^\]\[]*\])(?![^#]*\#([^#]*\#{2})*[^#]*$)
matches a space not followed by 匹配一个不跟在后面的空格
[
or ]
followed by ]
除[
或]
后跟]
以外的任何字符序列 #
followed by an even number of #
#
接着偶数#
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