Question

How to get substring that start and end with the same character in JavaScript

Answer 1

function char_substr(str, ch) {  
    var start = 0;
    var end = 0;
    for (var i = 0; str[i] !== '\0'; i++) {  
        if (str[i] === ch) {
            start = i;
            for (var j = i + 1; str[j] !== '\0'; j++) {
                if (str[j] === ch) {  
                    end = j; 
                    break;
                }
            }
        }
        if (start !== 0)
            break;
    }
    return [start, end];
}  
   
 
str = "hgdabcvauyec"; 
     
arr =  char_substr(str, 'a');

var start = arr[0];
var end = arr[1];
      
for (var i = start; i <= end; i++) {
        document.write(str[i]);
}



/*
run:

abcva 

*/

 

70+ SQL courses for beginners and professionals