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Enhance readability of ZeroOneKnapsack.js (TheAlgorithms#1574)

* Enhance readability of ZeroOneKnapsack.js * Update ZeroOneKnapsack.js --------- Co-authored-by: Lars Müller <34514239+appgurueu@users.noreply.github.com>

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Dynamic-Programming
- ZeroOneKnapsack.js

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`‎Dynamic-Programming/ZeroOneKnapsack.js`

Lines changed: 17 additions & 9 deletions

Original file line number	Diff line number	Diff line change
`@@ -1,26 +1,34 @@`
`1`	`1`	`/**`
`2`	`2`	`* A Dynamic Programming based solution for calculating Zero One Knapsack`
`3`	`3`	`* https://en.wikipedia.org/wiki/Knapsack_problem`
	`4`	`+ *`
	`5`	`+ * Time and Space Complexity: O(n*cap)`
`4`	`6`	`*/`
`5`		`-`
`6`	`7`	`const zeroOneKnapsack = (arr, n, cap, cache) => {`
	`8`	`+ // Base Case: No capacity or no items`
`7`	`9`	`if (cap === 0 \|\| n === 0) {`
`8`	`10`	`cache[n][cap] = 0`
`9`	`11`	`return cache[n][cap]`
`10`	`12`	`}`
	`13`	`+`
	`14`	`+ // Lookup (value already calculated)`
`11`	`15`	`if (cache[n][cap] !== -1) {`
`12`	`16`	`return cache[n][cap]`
`13`	`17`	`}`
	`18`	`+`
	`19`	`+ // Profit when excluding the nth item`
	`20`	`+ let notPick = zeroOneKnapsack(arr, n - 1, cap, cache)`
	`21`	`+`
	`22`	`+ // Profit when including the nth item`
	`23`	`+ let pick = 0`
`14`	`24`	`if (arr[n - 1][0] <= cap) {`
`15`		`- cache[n][cap] = Math.max(`
`16`		`- arr[n - 1][1] + zeroOneKnapsack(arr, n - 1, cap - arr[n - 1][0], cache),`
`17`		`- zeroOneKnapsack(arr, n - 1, cap, cache)`
`18`		`- )`
`19`		`- return cache[n][cap]`
`20`		`- } else {`
`21`		`- cache[n][cap] = zeroOneKnapsack(arr, n - 1, cap, cache)`
`22`		`- return cache[n][cap]`
	`25`	`+ // If weight of the nth item is within the capacity`
	`26`	`+ pick =`
	`27`	`+ arr[n - 1][1] + zeroOneKnapsack(arr, n - 1, cap - arr[n - 1][0], cache)`
`23`	`28`	`}`
	`29`	`+`
	`30`	`+ cache[n][cap] = Math.max(pick, notPick) // maximize profit`
	`31`	`+ return cache[n][cap]`
`24`	`32`	`}`
`25`	`33`
`26`	`34`	`const example = () => {`

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`‎Dynamic-Programming/ZeroOneKnapsack.js`

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