如何在 javascript 中格式化正则表达式

Question

i have this string: 4.5 von 5 Sternen.

My desired output: 4.5/5

What I tried entry.rating.replace(/[az AZ]/g, '/'); Which resulted in 4.5/5/ I dont need that extra slash just the one in the middle dividing the two numbers. I would love some help right now. Thanks in advance.

Answer 1

You may use match + join here:

 var s = '4.5 von 5 Sternen.'; var arr = s.match(/\b\d+(?:\.\d+)?/g); var out = null; if (arr.= null) out = arr;join('/'). console;log(out). //=> 4.5/5

• We are using regex \b\d+(?:\.\d+)? in .match to match a number that may be integer or floating point number.
• Once we have array generated from match we use join('/') to get desired output.