[英]How to split a string in two by first digit occurrence?
Having a string like this有这样的字符串
str = "word 12 otherword(s) 2000 19"
or like this或者像这样
str = "word word 12 otherword(s) 2000 19"
I need to split the string in two, in order to have an array like this:我需要将字符串分成两部分,以便拥有这样的数组:
newstr[0] = first part of the string
(ie "word" in the first case, "word word" in the second case); newstr[0] = first part of the string
(即第一种情况下的“word”,第二种情况下的“word word”);
newstr[1] = rest of the string
(ie "12 otherword(s) 2000 19" in both cases). newstr[1] = rest of the string
(即“12 otherword(s) 2000 19”在这两种情况下)。
I've tried to accomplish this using split
and regex
, without success:我尝试使用
split
和regex
来完成此操作,但没有成功:
str.split(/\d.*/)
returns Array [ "word ", "" ]
or Array [ "word word ", "" ]
str.split(/\d.*/)
返回Array [ "word ", "" ]
或Array [ "word word ", "" ]
while str.split(/^\D*/gm)
returns Array [ "", "12 otherword(s) 2000 19" ]
而
str.split(/^\D*/gm)
返回Array [ "", "12 otherword(s) 2000 19" ]
Would you give me a suggestion?你能给我一个建议吗? Even without using
split
and regex
- if there's a better/faster (Vanilla JavaScript) solution.即使不使用
split
和regex
- 如果有更好/更快的(Vanilla JavaScript)解决方案。
There's 3 things going on here.这里发生了 3 件事。
String.split usually doesn't includes the matched delimiter in the return array. String.split 通常在返回数组中不包含匹配的分隔符。 So splitting
abc.split('b')
would return ['a', 'c']
.所以拆分
abc.split('b')
会返回['a', 'c']
。 This behavior can be changed by using a matching regex group;可以通过使用匹配的正则表达式组来更改此行为; ie adding parens
'abc'.split(/(b)/)
will return ['a', 'b', 'c']
.即添加括号
'abc'.split(/(b)/)
将返回['a', 'b', 'c']
。
String.split will keep the delimter seperate from the other elements. String.split 将使分隔符与其他元素分开。 Ie
'abc'.split(/(b)/)
will return 3 elements ['a', 'b', 'c']
.即
'abc'.split(/(b)/)
将返回 3 个元素['a', 'b', 'c']
。 Suffix the regex with .*
to combine the last 2 elements: 'abc'.split(/(b.*)/)
will return ['a', 'bc', '']
.使用
.*
为正则表达式添加后缀以组合最后两个元素: 'abc'.split(/(b.*)/)
将返回['a', 'bc', '']
。
Lastly, to ignore the last empty element, we send the 2nd param of 2
.最后,为了忽略最后一个空元素,我们发送
2
的第二个参数。
let str = "word word 12 otherword(s) 2000 19"; let splitStr = str.split(/(\d.*)/, 2); console.log(splitStr);
You can match these parts:您可以匹配这些部分:
const strs = ["word 12 otherword(s) 2000 19", "word word 12 otherword(s) 2000 19"]; for (var s of strs) { const [_, part1, part2] = s.match(/^(\D*)(\d+[\w\W]*)/) console.log([part1, part2]) }
See the regex demo .请参阅正则表达式演示。
Regex details :正则表达式详细信息:
^
- start of a string ^
- 字符串的开头(\D*)
- Group 1: any zero or more chars other than digits (\D*)
- 第 1 组:除数字以外的任何零个或多个字符(\d+[\w\W]*)
- Group 2: one or more digits, and then any zero or more chars as many as possible. (\d+[\w\W]*)
- 第 2 组:一个或多个数字,然后是尽可能多的零个或多个字符。 Note you may .trim()
the resulting parts when using them (print them with console.log([part1.trim(), part2.trim()])
).请注意,您可以
.trim()
使用它们时生成的部分(使用console.log([part1.trim(), part2.trim()])
打印它们)。
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