how can i remove chars between indexes in a javascript string

Question

i have the following:

var S=\"hi how are you\";
var bindex = 2;
var eindex = 6;

how can i remove all the chars from S that reside between

Answer 1

First find the substring of the string to replace, then replace the first occurrence of that string with the empty string.

S = S.replace(S.substring(bindex, eindex), "");

Another way is to convert the string to an array, splice out the unwanted part and convert to string again.

var result = S.split('');
result.splice(bindex, eindex - bindex);
S = result.join('');

Answer 2

The following function returns the complementary result of slice function:

 String.prototype.remainderOfSlice = function(begin, end) {

    begin = begin || 0
    end = (end === undefined) ? this.length : end 

    if (this.slice(begin, end) === '') return this + ''
    return this.slice(0, begin) + this.slice(end) 
 }

examples:

 "hi how are you".slice(2, 6) // " how"
 "hi how are you".remainderOfSlice(2, 6) // "hi are you"

 "hi how are you".slice(-2, 6) // ""
 "hi how are you".remainderOfSlice(-2, 6) // "hi how are you"

Answer 3

S.split(S.substring(bindex, eindex)).join(" ");

Answer 4

Take the text before bindex and concatenate with text after eindex, like:

var S="hi how are you"; 
var bindex = 2; var eindex = 6; 
S = S.substr(0, bindex) + S.substr(eindex);

S is now "hi are you"

Answer 5

You can:

1. get the substring from bindex and eindex
2. remove spaces from that string

3. rebuild the string

   var new_s = S.slice(1, bindex) + S.slice(bindex, eindex).replace(/\s/g, '') + S.slice(eindex)

Answer 6

With String.slice:

S = S.slice(0, bindex) + S.slice(eindex);