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- var Calculator = function(el) {
- this.eqCtl = document.getElementById(el);
- };
- Calculator.prototype = {
- add: function(x, y) {
- var val = x + y;
- this.eqCtl.innerHTML = val;
- }
- }
- var calc = new Calculator('eqCtl');
- calc.add(2, 2);
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