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---
id: a56138aff60341a09ed6c480
title: Inventory Update
localeTitle: Actualización de inventario
challengeType: 5
---
## Description
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< section id = 'description' >
Compare y actualice el inventario almacenado en una matriz 2D con una segunda matriz 2D de una entrega nueva. Actualice las cantidades de artículos de inventario existentes actuales (en < code > arr1< / code > ). Si no se puede encontrar un artículo, agregue el nuevo artículo y la cantidad en la matriz de inventario. La matriz de inventario devuelta debe estar ordenada alfabéticamente por artículo.
Recuerda usar < a href = 'http://forum.freecodecamp.org/t/how-to-get-help-when-you-are-stuck/19514' target = '_blank' > Read-Search-Ask< / a > si te atascas. Trate de emparejar el programa. Escribe tu propio código.
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< / section >
## Instructions
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< section id = 'instructions' >
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< / section >
## Tests
< section id = 'tests' >
```yml
tests:
- text: La función < code > updateInventory</ code > debería devolver una matriz.
testString: 'assert.isArray(updateInventory([[21, "Bowling Ball"], [2, "Dirty Sock"], [1, "Hair Pin"], [5, "Microphone"]], [[2, "Hair Pin"], [3, "Half-Eaten Apple"], [67, "Bowling Ball"], [7, "Toothpaste"]]), "The function < code > updateInventory< / code > should return an array.");'
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- text: ' < code > updateInventory([[21, " Bowling Ball" ], [2, " Dirty Sock" ], [1, " Hair Pin" ], [5, " Microphone" ]], [[2, " Hair Pin" ], [3, " Half-Eaten Apple" ], [67, " Bowling Ball" ], [7, " Toothpaste" ]])</ code > debe devolver una matriz con una longitud de 6. '
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testString: 'assert.equal(updateInventory([[21, "Bowling Ball"], [2, "Dirty Sock"], [1, "Hair Pin"], [5, "Microphone"]], [[2, "Hair Pin"], [3, "Half-Eaten Apple"], [67, "Bowling Ball"], [7, "Toothpaste"]]).length, 6, "< code > updateInventory([[21, "Bowling Ball"], [2, "Dirty Sock"], [1, "Hair Pin"], [5, "Microphone"]], [[2, "Hair Pin"], [3, "Half-Eaten Apple"], [67, "Bowling Ball"], [7, "Toothpaste"]])< / code > should return an array with a length of 6.");'
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- text: ' < code > updateInventory([[21, " Bowling Ball" ], [2, " Dirty Sock" ], [1, " Hair Pin" ], [5, " Microphone" ]], [[2, " Hair Pin" ], [3, " Half-Eaten Apple" ], [67, " Bowling Ball" ], [7, " Toothpaste" ]])</ code > debe devolver < code > [[88, " Bowling Ball" ], [2, " Dirty Sock" ], [3, " Hair Pin" ], [3, " Half-Eaten Apple" ], [5, " Microphone" ], [7, " Toothpaste" ]]</ code > . '
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testString: 'assert.deepEqual(updateInventory([[21, "Bowling Ball"], [2, "Dirty Sock"], [1, "Hair Pin"], [5, "Microphone"]], [[2, "Hair Pin"], [3, "Half-Eaten Apple"], [67, "Bowling Ball"], [7, "Toothpaste"]]), [[88, "Bowling Ball"], [2, "Dirty Sock"], [3, "Hair Pin"], [3, "Half-Eaten Apple"], [5, "Microphone"], [7, "Toothpaste"]], "< code > updateInventory([[21, "Bowling Ball"], [2, "Dirty Sock"], [1, "Hair Pin"], [5, "Microphone"]], [[2, "Hair Pin"], [3, "Half-Eaten Apple"], [67, "Bowling Ball"], [7, "Toothpaste"]])< / code > should return < code > [[88, "Bowling Ball"], [2, "Dirty Sock"], [3, "Hair Pin"], [3, "Half-Eaten Apple"], [5, "Microphone"], [7, "Toothpaste"]]< / code > .");'
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- text: ' < code > updateInventory([[21, " Bowling Ball" ], [2, " Dirty Sock" ], [1, " Hair Pin" ], [5, " Microphone" ]], [])</ code > debe devolver < code > [[21, " Bowling Ball" ], [2, " Dirty Sock" ], [1, " Hair Pin" ], [5, " Microphone" ]]</ code > . '
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testString: 'assert.deepEqual(updateInventory([[21, "Bowling Ball"], [2, "Dirty Sock"], [1, "Hair Pin"], [5, "Microphone"]], []), [[21, "Bowling Ball"], [2, "Dirty Sock"], [1, "Hair Pin"], [5, "Microphone"]], "< code > updateInventory([[21, "Bowling Ball"], [2, "Dirty Sock"], [1, "Hair Pin"], [5, "Microphone"]], [])< / code > should return < code > [[21, "Bowling Ball"], [2, "Dirty Sock"], [1, "Hair Pin"], [5, "Microphone"]]< / code > .");'
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- text: ' < code > updateInventory([], [[2, " Hair Pin" ], [3, " Half-Eaten Apple" ], [67, " Bowling Ball" ], [7, " Toothpaste" ]])</ code > debe devolver < code > [[67, " Bowling Ball" ], [2, " Hair Pin" ], [3, " Half-Eaten Apple" ], [7, " Toothpaste" ]]</ code > . '
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testString: 'assert.deepEqual(updateInventory([], [[2, "Hair Pin"], [3, "Half-Eaten Apple"], [67, "Bowling Ball"], [7, "Toothpaste"]]), [[67, "Bowling Ball"], [2, "Hair Pin"], [3, "Half-Eaten Apple"], [7, "Toothpaste"]], "< code > updateInventory([], [[2, "Hair Pin"], [3, "Half-Eaten Apple"], [67, "Bowling Ball"], [7, "Toothpaste"]])< / code > should return < code > [[67, "Bowling Ball"], [2, "Hair Pin"], [3, "Half-Eaten Apple"], [7, "Toothpaste"]]< / code > .");'
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- text: ' < code > updateInventory([[0, " Bowling Ball" ], [0, " Dirty Sock" ], [0, " Hair Pin" ], [0, " Microphone" ]], [[1, " Hair Pin" ], [1, " Half-Eaten Apple" ], [1, " Bowling Ball" ], [1, " Toothpaste" ]])</ code > debe devolver < code > [[1, " Bowling Ball" ], [0, " Dirty Sock" ], [1, " Hair Pin" ], [1, " Half-Eaten Apple" ], [0, " Microphone" ], [1, " Toothpaste" ]]</ code > . '
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testString: 'assert.deepEqual(updateInventory([[0, "Bowling Ball"], [0, "Dirty Sock"], [0, "Hair Pin"], [0, "Microphone"]], [[1, "Hair Pin"], [1, "Half-Eaten Apple"], [1, "Bowling Ball"], [1, "Toothpaste"]]), [[1, "Bowling Ball"], [0, "Dirty Sock"], [1, "Hair Pin"], [1, "Half-Eaten Apple"], [0, "Microphone"], [1, "Toothpaste"]], "< code > updateInventory([[0, "Bowling Ball"], [0, "Dirty Sock"], [0, "Hair Pin"], [0, "Microphone"]], [[1, "Hair Pin"], [1, "Half-Eaten Apple"], [1, "Bowling Ball"], [1, "Toothpaste"]])< / code > should return < code > [[1, "Bowling Ball"], [0, "Dirty Sock"], [1, "Hair Pin"], [1, "Half-Eaten Apple"], [0, "Microphone"], [1, "Toothpaste"]]< / code > .");'
```
< / section >
## Challenge Seed
< section id = 'challengeSeed' >
< div id = 'js-seed' >
```js
function updateInventory(arr1, arr2) {
// All inventory must be accounted for or you're fired!
return arr1;
}
// Example inventory lists
var curInv = [
[21, "Bowling Ball"],
[2, "Dirty Sock"],
[1, "Hair Pin"],
[5, "Microphone"]
];
var newInv = [
[2, "Hair Pin"],
[3, "Half-Eaten Apple"],
[67, "Bowling Ball"],
[7, "Toothpaste"]
];
updateInventory(curInv, newInv);
```
< / div >
< / section >
## Solution
< section id = 'solution' >
```js
function updateInventory(arr1, arr2) {
arr2.forEach(function(item) {
createOrUpdate(arr1, item);
});
// All inventory must be accounted for or you're fired!
return arr1;
}
function createOrUpdate(arr1, item) {
var index = -1;
while (++index < arr1.length ) {
if (arr1[index][1] === item[1]) {
arr1[index][0] += item[0];
return;
}
if (arr1[index][1] > item[1]) {
break;
}
}
arr1.splice(index, 0, item);
}
// Example inventory lists
var curInv = [
[21, 'Bowling Ball'],
[2, 'Dirty Sock'],
[1, 'Hair Pin'],
[5, 'Microphone']
];
var newInv = [
[2, 'Hair Pin'],
[3, 'Half-Eaten Apple'],
[67, 'Bowling Ball'],
[7, 'Toothpaste']
];
updateInventory(curInv, newInv);
```
< / section >
