javascript正则表达式-用一个替换所有实例

Question

I want to replace all the words XXX/XXX/XXX/ ... with one XXX/

For example:

www.domain.com/XXX/XXX/XXX/XXX/XXX/section/XXX/XXX

should be:

www.domain.com/XXX/section/XXX

How can i do it with regex instead of:

str.replace("XXX/XXX","XXX").replace("XXX/XXX","XXX").replace("XXX/XXX","XXX").replace("XXX/XXX","XXX").replace("XXX/XXX","XXX").replace("XXX/XXX","XXX");

Thanks

Answer 1

You can use regular expression to match all occurrences of /XXX that are repeated 2 or more times in a row:

 var str = "www.domain.com/XXX/XXX/XXX/XXX/XXX/section/XXX/XXX"; var strOut = str.replace(/(\\/XXX){2,}/g, '$1'); console.log(strOut); 

Answer 2

Solution

 const input = "www.domain.com/XXX/XXX/XXX/XXX/XXX/section/XXX/XXX"; const expectedOutput = "www.domain.com/XXX/section/XXX" const actualOutput = input.replace(/(\\/XXX)\\1+/g, "$1") console.log("output", actualOutput) 

Explanation

the () will capture the match inside the parenthesis.

the \\1 and $1 will use whats captured inside the first capture group, the /XXX in our case.

the + will ask for 1 or more repeats.

the g flag will cause the regex to be applied on the whole string, even if a match is found earlier.

the whole regex will look for an /XXX followed by another /XXX 1 or more times, then replacing whats matched with only one "/XXX".

Answer 3

Try this:

 var str = "www.domain.com/XXX/XXX/XXX/XXX/XXX/section/XXX/XXX"; str = str.replace(/(XXX\\/*)+/g, "XXX/"); console.log(str); 

Answer 4

Try this

 var url="www.domain.com/XXX/XXX/XXX/XXX/XXX/section/XXX/XXX"; var regexer=/(XXX\\/*)+/g; url = url.replace(regexer, "XXX/"); console.log(url) 

Answer 5

Try:

 function processUrl(url) { return url.replace(/www.domain.com(\\/[^/]*)*\\/section(\\/[^/]*)*/g, "www.domain.com$1/section$2"); } console.log(processUrl("www.domain.com/XXX/XXX/XXX/XXX/XXX/section/XXX/XXX")); console.log(processUrl("www.domain.com/XXX/XXX/XXX/XXX/XXX/section/YYY/YYY")); console.log(processUrl("www.domain.com/XXX/XXX/XXX/XXX/section/ZZZ/ZZZ/ZZZ")); 

Answer 6

To capture and output only first occurrence of XXX/* :

 var url="www.domain.com/XXX/XXX/XXX/XXX/XXX/section/XXX/XXX"; var re=/(XXX\\/*)+/g; url = url.replace(re, "$1"); console.log(url)