[英]Javascript string match specific regex
I want to match specific string from this variable. 我想匹配此变量中的特定字符串。
var string = '150-50-30-20=50+skip50-20-10-5=15+1*2*3*4=24+50-50*30*20=0+skip2*4*8=64';
Here is my regex : 这是我的正则表达式:
var string = '150-50-30-20=50+skip50-20-10-5=15+1*2*3*4=24+50-50*30*20=0+skip2*4*8=64';
var match_data = [];
match_data = string.match(/[0-9]+(?:((\s*\-\s*|\s*\*\s*)[0-9]+)*)\s*\=\s*[0-9]+(?:(\s*\+\s*[0-9]+(?:((\s*\-\s*|\s*\*\s*)[0-9]+)*)\s*=\s*[0-9]+)*)/g);
console.log(match_data);
The output will show 输出将显示
[
0: "150-50-30-20=50"
1: "50-20-10-5=15+1*2*3*4=24+50-50*30*20=0"
2: "2*4*8=64"
]
The result that I want to match from string
variable is only 我要从
string
变量匹配的结果只是
[
0: "150-50-30-20=50"
1: "1*2*3*4=24"
2: "50-50*30*20=0"
]
You may use ((?:\\+|^)skip)?
您可以使用
((?:\\+|^)skip)?
capturing group before (\\d+(?:\\s*[-*\\/+]\\s*\\d+)*\\s*=\\s*\\d+)
in the pattern, find each match, and whenever Group 1 is not undefined, skip (or omit) that match, else, grab Group 2 value. 在模式中的
(\\d+(?:\\s*[-*\\/+]\\s*\\d+)*\\s*=\\s*\\d+)
之前捕获组,找到每个匹配项,并且每当组1不存在时未定义,跳过(或忽略)匹配的内容,否则,获取组2的值。
var string = '150-50-30-20=50+skip50-20-10-5=15+1*2*3*4=24+50-50*30*20=0+skip2*4*8=64', reg = /((?:^|\\+)skip)?(\\d+(?:\\s*[-*\\/+]\\s*\\d+)*\\s*=\\s*\\d+)/gi, match_data = [], m; while(m=reg.exec(string)) { if (!m[1]) { match_data.push(m[2]); } } console.log(match_data);
Note that I added /
and +
operators ( [-*\\/+]
) to the pattern. 请注意,我在模式中添加了
/
和+
运算符( [-*\\/+]
)。
Regex details 正则表达式详细信息
((?:^|\\+)skip)?
- Group 1 (optional): 1 or 0 occurrences of +skip
or skip
at the start of a string +skip
或skip
(\\d+(?:\\s*[-*\\/+]\\s*\\d+)*\\s*=\\s*\\d+)
- Group 2: (\\d+(?:\\s*[-*\\/+]\\s*\\d+)*\\s*=\\s*\\d+)
-组2:
\\d+
- 1+ digits \\d+
-1个以上数字 (?:\\s*[-*\\/+]\\s*\\d+)*
- zero or more repetitions of (?:\\s*[-*\\/+]\\s*\\d+)*
-零个或多个重复
\\s*[-*\\/+]\\s*
- -
, *
, /
, +
enclosed with 0+ whitespaces \\s*[-*\\/+]\\s*
-
, *
, /
, +
包含0+空格 \\d+
- 1+ digits \\d+
-1个以上数字 \\s*=\\s*
- =
enclosed with 0+ whitespaces \\s*=\\s*
- =
包含0+空格 \\d+
- 1+ digits. \\d+
-1个以上的数字。 As per your input string and the expected results in array, you can just split your string with +
and then filter out strings starting with skip
and get your intended matches in your array. 根据您输入的字符串和数组中的预期结果,您可以使用
+
分割字符串,然后从skip
过滤掉字符串,并在数组中获得预期的匹配项。
const s = '150-50-30-20=50+skip50-20-10-5=15+1*2*3*4=24+50-50*30*20=0+skip2*4*8=64' console.log(s.split(/\\+/).filter(x => !x.startsWith("skip")))
There are other similar approaches using regex that I can suggest, but the approach mentioned above using split seems simple and good enough. 我可以建议使用正则表达式的其他类似方法,但是上面提到的使用split的方法似乎简单且足够好。
try 尝试
var t = string.split('+skip');
var tt= t[1].split('+');
var r = [t[0],tt[1],tt[2]]
var string = '150-50-30-20=50+skip50-20-10-5=15+1*2*3*4=24+50-50*30*20=0+skip2*4*8=64'; var t = string.split('+skip'); var tt= t[1].split('+'); var r = [t[0],tt[1],tt[2]] console.log(r)
const string = '150-50-30-20=50+skip50-20-10-5=15+1*2*3*4=24+50-50*30*20=0+skip2*4*8=64'; const stepOne = string.replace(/skip[^=]*=\\d+./g, "") const stepTwo = stepOne.replace(/\\+$/, "") const result = stepTwo.split("+") console.log(result)
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