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how can i remove chars between indexes in a javascript string

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 bindex and eindex?
therefore S will be "hi are you"

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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"


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