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45 lines
1.5 KiB
HTML
45 lines
1.5 KiB
HTML
<p>Write a function <code>createCounter</code>. It should accept an initial integer <code>init</code>. It should return an object with three functions.</p>
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<p>The three functions are:</p>
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<ul>
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<li><code>increment()</code> increases the current value by 1 and then returns it.</li>
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<li><code>decrement()</code> reduces the current value by 1 and then returns it.</li>
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<li><code>reset()</code> sets the current value to <code>init</code> and then returns it.</li>
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</ul>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<pre>
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<strong>Input:</strong> init = 5, calls = ["increment","reset","decrement"]
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<strong>Output:</strong> [6,5,4]
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<strong>Explanation:</strong>
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const counter = createCounter(5);
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counter.increment(); // 6
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counter.reset(); // 5
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counter.decrement(); // 4
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</pre>
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<p><strong class="example">Example 2:</strong></p>
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<pre>
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<strong>Input:</strong> init = 0, calls = ["increment","increment","decrement","reset","reset"]
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<strong>Output:</strong> [1,2,1,0,0]
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<strong>Explanation:</strong>
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const counter = createCounter(0);
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counter.increment(); // 1
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counter.increment(); // 2
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counter.decrement(); // 1
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counter.reset(); // 0
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counter.reset(); // 0
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</pre>
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<p> </p>
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<p><strong>Constraints:</strong></p>
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<ul>
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<li><code>-1000 <= init <= 1000</code></li>
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<li><code>total calls not to exceed 1000</code></li>
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</ul>
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