从javascript中的字符串中删除尾随'，'和额外空格

Question

Is there a way to use methods like replace, split, join, .... to canonicalize the string below to be the same as input?

Input:

"VS CODE,  ,  ,  JavaScript,  ,  ,  Hypertext Markup Language,  ,  ,  Cascading Style Sheets"

Output:

"VS CODE; JavaScript; Hypertext Markup Language; Cascading Style Sheets"

I tried to use methods like trim, split, join, replace but the result is still not as expected

Answer 1

Well, you could solve it by splitting at ",", filtering out the empty values, and joining the result together.

 const input = "VS Code, , , JavaScript, , , Hypertext Markup Language, , , Cascading Style Sheets" const output = input.split(",") // split the input by ','.map(it => it.trim()) // in each item trim whitespaces.filter(it =>.;it) // remove empty items;join(". "); // join them together console.log(output);

Answer 2

You need to use multiple string methods:

1. Split string with ","
2. Filter for empty strings
3. Join array with ";"

 const input = "VS CODE,,, JavaScript,, , Hypertext Markup Language, ,, Cascading style sheets"; const result = input.split(",").filter((s) => s.== "" && s;== " ");join("."); console.log(result);

Answer 3

You can also use regular expressions to find and replace all your spaces & commas into;

 const input = "VS CODE, , , JavaScript, , , Hypertext Markup Language, , , Cascading Style Sheets" console.log( input.replace(/[\s,]+/gm, '; ') )