Test task - closure
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function combinedFunc(a = 0){
this.res = a;
}
combinedFunc.prototype.add = function(b){
this.res += b;
return this;
};
combinedFunc.prototype.deduct = function(b){
this.res -= b;
return this;
};
combinedFunc.prototype.mult = function(b){
this.res *= b;
return this;
};
combinedFunc.prototype.div = function(b){
this.res /= b;
return this;
};
combinedFunc.prototype.inc = function(){
this.res++;
return this;
};
combinedFunc.prototype.valueOf = function(){
return this.res;
};
var cf = new combinedFunc(0);
console.log(cf.add(6).mult(2).div(3).deduct(2).inc() == 3);
JavaScript
INFO