Javascript stringSplice

void function(root){

 var splice = Array.prototype.splice;

 function toString(value){ return String(value || '') }

 function toArray(val){ return toString(val).split('') }

 function stringSplice(original, from, length, change){

 var org = toArray(original)
 , chg = toArray(change)

 splice.apply(org, [from, length].concat(chg)).join('')
 return org 
 } 

 module.exports = stringSplice

}(this) 

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