Question

How to extract all the substrings between single quotation marks in TypeScript

Answer 1

function extractSubstrings(s: string):  string[] | "" {
    // Regular expression pattern to find substrings between single quotation marks
    const pattern: RegExp = /'(.*?)'/g;
       
    // Find all matches in the input string
    const substrings: string[] = [];
    let match: any;
       
    while ((match = pattern.exec(s)) !== null) {
        substrings.push(match[1]);
    }
       
    if (substrings.length === 0) { 
        return "";
    }
          
    return substrings;
}
 
const str: string = "TypeScript is a free and 'open-source' 'high-level' 'programming language'";
 
const result: string[] | "" = extractSubstrings(str);
console.log(result);
 


/*
run:
 
["open-source", "high-level", "programming language"] 
 
*/
 

 

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