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| 1 | - | function add() {
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| 1 | + | function add(n) {
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| 2 | if (typeof add.summ === "number") {
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| 3 | add.summ += n; | |
| 4 | } else {
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| 5 | add.summ = n | |
| 6 | }; | |
| 7 | ||
| 8 | return add; | |
| 9 | } | |
| 10 | ||
| 11 | Function.prototype.toString = function () {
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| 12 | var res = this.summ || "No sum"; | |
| 13 | ||
| 14 | delete this.summ; | |
| 15 | ||
| 16 | return res; | |
| 17 | } | |
| 18 | ||
| 19 | alert( add(1) ) // выведет '1' | |
| 20 | alert( add(1)(9) ) // выведет '10' | |
| 21 | alert( add(4)(4)(4) ) // выведет '12' |
