Question

How to get all substrings of a string with JavaScript

Answer 1

var s = "abcde";

for (var i = 0; i < s.length; i++) { 
    for (var j = i + 1; j <= s.length; j++) { 
         document.write(s.substring(i, j) + "<br />");
    }
}



/*

a
ab
abc
abcd
abcde
b
bc
bcd
bcde
c
cd
cde
d
de
e
    
*/

 

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Answer 2

function all_substrings(s) {
  var subs = [];

  for (var i = 0; i < s.length; i++) {
      for (var j = i + 1; j < s.length + 1; j++) {
          subs.push(s.slice(i, j));
      }
  }
  return subs;
}

var s = "abcde";

document.write(all_substrings(s));



/*

a,ab,abc,abcd,abcde,b,bc,bcd,bcde,c,cd,cde,d,de,e 
    
*/

 

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