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update: Fibonacci using tabular method #12

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Merged
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Sep 24, 2019
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update: Fibonacci using tabular method #12

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21 changes: 21 additions & 0 deletions src/_Classics_/fibonacci/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -34,3 +34,24 @@ function fibonacciMemoized(index, cache) {
}
return cache[index];
}

/**
* Using the bottom up approach, also known as tabular method
*/

function fibonacciTabular(n) {
const table = [0, 1];

for (let i = 2; i <= n; i += 1) {
table[i] = table[i - 1] + table[i - 2];
}

return table[n];
}

// const number = 50;

// console.log(`Fib normal - ${fibonacci(number)}`);
// console.log('--');
// console.log(`Fib memo - ${fibonacciMemoized(number)}`);
// console.log(`Fib table - ${fibonacciTabular(number)}`);