feat: enable new langs (#42491)

Enable italian and portuguese
2021-06-15 00:49:18 -07:00
parent d8d6d20793
commit f25e3e69f8
3301 changed files with 423168 additions and 6 deletions
--- a/curriculum/challenges/italian/10-coding-interview-prep/rosetta-code/knapsack-problem-continuous.md
+++ b/curriculum/challenges/italian/10-coding-interview-prep/rosetta-code/knapsack-problem-continuous.md
@@ -0,0 +1,169 @@
+---
+id: 5a23c84252665b21eecc7ed3
+title: Knapsack problem/Continuous
+challengeType: 5
+forumTopicId: 323654
+dashedName: knapsack-problemcontinuous
+---
+
+# --description--
+
+A thief burgles a butcher's shop, where he can select from some items.
+
+The thief knows the weights and prices of each items. Because he has a knapsack with a limit on the maximum weight that it can carry, he wants to select the items such that he would have his profit maximized. He may cut the items; the item has a reduced price after cutting that is proportional to the original price by the ratio of masses. That means: half of an item has half the price of the original.
+
+# --instructions--
+
+Write a function that takes an array of objects representing the items available in the shop. Each object has 3 attributes: name, weight, and value. The function also takes the maximum weight as a parameter. The function should return the maximum value possible, and the total weight of the selected items should not exceed the maximum weight.
+
+# --hints--
+
+`knapContinuous([{ "weight":3.8, "value":36, name:"beef" }, { "weight":5.4, "value":43, name:"pork" }, { "weight":3.6, "value":90, name:"ham" }, { "weight":2.4, "value":45, name:"greaves" }, { "weight":4.0, "value":30, name:"flitch" }, { "weight":2.5, "value":56, name:"brawn" }, { "weight":3.7, "value":67, name:"welt" }, { "weight":3.0, "value":95, name:"salami" }, { "weight":5.9, "value":98, name:"sausage" }], 10)` should return `257.875`.
+
+```js
+assert.equal(
+  knapContinuous(
+    [
+      { weight: 3.8, value: 36, name: 'beef' },
+      { weight: 5.4, value: 43, name: 'pork' },
+      { weight: 3.6, value: 90, name: 'ham' },
+      { weight: 2.4, value: 45, name: 'greaves' },
+      { weight: 4.0, value: 30, name: 'flitch' },
+      { weight: 2.5, value: 56, name: 'brawn' },
+      { weight: 3.7, value: 67, name: 'welt' },
+      { weight: 3.0, value: 95, name: 'salami' },
+      { weight: 5.9, value: 98, name: 'sausage' }
+    ],
+    10
+  ),
+  257.875
+);
+```
+
+`knapContinuous([{ "weight":3.8, "value":36, name:"beef" }, { "weight":5.4, "value":43, name:"pork" }, { "weight":3.6, "value":90, name:"ham" }, { "weight":2.4, "value":45, name:"greaves" }, { "weight":4.0, "value":30, name:"flitch" }, { "weight":2.5, "value":56, name:"brawn" }, { "weight":3.7, "value":67, name:"welt" }, { "weight":3.0, "value":95, name:"salami" }, { "weight":5.9, "value":98, name:"sausage" }], 12)` should return `295.05405405405406`.
+
+```js
+assert.equal(
+  knapContinuous(
+    [
+      { weight: 3.8, value: 36, name: 'beef' },
+      { weight: 5.4, value: 43, name: 'pork' },
+      { weight: 3.6, value: 90, name: 'ham' },
+      { weight: 2.4, value: 45, name: 'greaves' },
+      { weight: 4.0, value: 30, name: 'flitch' },
+      { weight: 2.5, value: 56, name: 'brawn' },
+      { weight: 3.7, value: 67, name: 'welt' },
+      { weight: 3.0, value: 95, name: 'salami' },
+      { weight: 5.9, value: 98, name: 'sausage' }
+    ],
+    12
+  ),
+  295.05405405405406
+);
+```
+
+`knapContinuous([{ "weight":3.8, "value":36, name:"beef" }, { "weight":5.4, "value":43, name:"pork" }, { "weight":3.6, "value":90, name:"ham" }, { "weight":2.4, "value":45, name:"greaves" }, { "weight":4.0, "value":30, name:"flitch" }, { "weight":2.5, "value":56, name:"brawn" }, { "weight":3.7, "value":67, name:"welt" }, { "weight":3.0, "value":95, name:"salami" }, { "weight":5.9, "value":98, name:"sausage" }], 15)` should return `349.3783783783784`.
+
+```js
+assert.equal(
+  knapContinuous(
+    [
+      { weight: 3.8, value: 36, name: 'beef' },
+      { weight: 5.4, value: 43, name: 'pork' },
+      { weight: 3.6, value: 90, name: 'ham' },
+      { weight: 2.4, value: 45, name: 'greaves' },
+      { weight: 4.0, value: 30, name: 'flitch' },
+      { weight: 2.5, value: 56, name: 'brawn' },
+      { weight: 3.7, value: 67, name: 'welt' },
+      { weight: 3.0, value: 95, name: 'salami' },
+      { weight: 5.9, value: 98, name: 'sausage' }
+    ],
+    15
+  ),
+  349.3783783783784
+);
+```
+
+`knapContinuous([{ "weight":3.8, "value":36, name:"beef" }, { "weight":5.4, "value":43, name:"pork" }, { "weight":3.6, "value":90, name:"ham" }, { "weight":2.4, "value":45, name:"greaves" }, { "weight":4.0, "value":30, name:"flitch" }, { "weight":2.5, "value":56, name:"brawn" }, { "weight":3.7, "value":67, name:"welt" }, { "weight":3.0, "value":95, name:"salami" }, { "weight":5.9, "value":98, name:"sausage" }], 22)` should return `459.5263157894737`.
+
+```js
+assert.equal(
+  knapContinuous(
+    [
+      { weight: 3.8, value: 36, name: 'beef' },
+      { weight: 5.4, value: 43, name: 'pork' },
+      { weight: 3.6, value: 90, name: 'ham' },
+      { weight: 2.4, value: 45, name: 'greaves' },
+      { weight: 4.0, value: 30, name: 'flitch' },
+      { weight: 2.5, value: 56, name: 'brawn' },
+      { weight: 3.7, value: 67, name: 'welt' },
+      { weight: 3.0, value: 95, name: 'salami' },
+      { weight: 5.9, value: 98, name: 'sausage' }
+    ],
+    22
+  ),
+  459.5263157894737
+);
+```
+
+`knapContinuous([{ "weight":3.8, "value":36, name:"beef" }, { "weight":5.4, "value":43, name:"pork" }, { "weight":3.6, "value":90, name:"ham" }, { "weight":2.4, "value":45, name:"greaves" }, { "weight":4.0, "value":30, name:"flitch" }, { "weight":2.5, "value":56, name:"brawn" }, { "weight":3.7, "value":67, name:"welt" }, { "weight":3.0, "value":95, name:"salami" }, { "weight":5.9, "value":98, name:"sausage" }], 24)` should return `478.4736842105263`.
+
+```js
+assert.equal(
+  knapContinuous(
+    [
+      { weight: 3.8, value: 36, name: 'beef' },
+      { weight: 5.4, value: 43, name: 'pork' },
+      { weight: 3.6, value: 90, name: 'ham' },
+      { weight: 2.4, value: 45, name: 'greaves' },
+      { weight: 4.0, value: 30, name: 'flitch' },
+      { weight: 2.5, value: 56, name: 'brawn' },
+      { weight: 3.7, value: 67, name: 'welt' },
+      { weight: 3.0, value: 95, name: 'salami' },
+      { weight: 5.9, value: 98, name: 'sausage' }
+    ],
+    24
+  ),
+  478.4736842105263
+);
+```
+
+# --seed--
+
+## --seed-contents--
+
+```js
+function knapContinuous(items, maxweight) {
+
+}
+```
+
+# --solutions--
+
+```js
+function knapContinuous(items, maxweight) {
+  function item_cmp(a, b) {
+    const ua = a.unitVal,
+      ub = b.unitVal;
+    return ua < ub ? 1 : ua > ub ? -1 : 0;
+  }
+  items = items.map(({ value, weight }) => ({
+    unitVal: value / weight,
+    weight
+  }));
+  items.sort(item_cmp);
+
+  let val = 0;
+  let wt = 0;
+  for (let { unitVal, weight } of items) {
+    var portion = Math.min(maxweight - wt, weight);
+    wt += portion;
+    var addVal = portion * unitVal;
+    val += addVal;
+    if (wt >= maxweight) {
+      break;
+    }
+  }
+  return val;
+}
+```